CH509343A - Isoxazolyl-pyridinium salts having hypoglycaemic - Google Patents
Isoxazolyl-pyridinium salts having hypoglycaemicInfo
- Publication number
- CH509343A CH509343A CH729770A CH729770A CH509343A CH 509343 A CH509343 A CH 509343A CH 729770 A CH729770 A CH 729770A CH 729770 A CH729770 A CH 729770A CH 509343 A CH509343 A CH 509343A
- Authority
- CH
- Switzerland
- Prior art keywords
- isoxazolyl
- methyl
- lower alkyl
- salt
- alkyl
- Prior art date
Links
- NQYYYBSUMYOTIJ-UHFFFAOYSA-N 3-pyridin-1-ium-1-yl-1,2-oxazole Chemical class O1C=CC([N+]=2C=CC=CC=2)=N1 NQYYYBSUMYOTIJ-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 230000002218 hypoglycaemic effect Effects 0.000 title abstract description 3
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 14
- 125000003342 alkenyl group Chemical group 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 150000002443 hydroxylamines Chemical class 0.000 claims description 4
- 125000000339 4-pyridyl group Chemical group N1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 claims description 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 2
- 229910052739 hydrogen Inorganic materials 0.000 claims 2
- 239000001257 hydrogen Substances 0.000 claims 2
- 238000006798 ring closing metathesis reaction Methods 0.000 claims 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000002798 polar solvent Substances 0.000 claims 1
- 150000003222 pyridines Chemical class 0.000 claims 1
- 238000005956 quaternization reaction Methods 0.000 claims 1
- -1 ar(lower)-alkenyl Chemical group 0.000 abstract description 5
- 239000008280 blood Substances 0.000 abstract description 4
- 210000004369 blood Anatomy 0.000 abstract description 4
- 150000001450 anions Chemical class 0.000 abstract description 3
- 125000003545 alkoxy group Chemical group 0.000 abstract 1
- 125000000753 cycloalkyl group Chemical group 0.000 abstract 1
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 18
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 16
- 239000013078 crystal Substances 0.000 description 16
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 9
- WTDHULULXKLSOZ-UHFFFAOYSA-N Hydroxylamine hydrochloride Chemical compound Cl.ON WTDHULULXKLSOZ-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004480 active ingredient Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 description 4
- 239000002552 dosage form Substances 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 3
- 239000003937 drug carrier Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000006187 pill Substances 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 230000001225 therapeutic effect Effects 0.000 description 3
- KUKIDIVHMGASSW-UHFFFAOYSA-M 3-ethyl-5-(1-methylpyridin-1-ium-4-yl)-1,2-oxazole;chloride Chemical compound [Cl-].O1N=C(CC)C=C1C1=CC=[N+](C)C=C1 KUKIDIVHMGASSW-UHFFFAOYSA-M 0.000 description 2
- ONWVWQNOTUTWGQ-UHFFFAOYSA-M 3-methyl-5-(1-methylpyridin-1-ium-4-yl)-1,2-oxazole;chloride Chemical compound [Cl-].O1N=C(C)C=C1C1=CC=[N+](C)C=C1 ONWVWQNOTUTWGQ-UHFFFAOYSA-M 0.000 description 2
- SNMAMLQEKVNFHE-UHFFFAOYSA-M 3-methyl-5-(1-prop-2-enylpyridin-1-ium-4-yl)-1,2-oxazole;chloride Chemical compound [Cl-].O1N=C(C)C=C1C1=CC=[N+](CC=C)C=C1 SNMAMLQEKVNFHE-UHFFFAOYSA-M 0.000 description 2
- UXZUURWFPJSDNN-UHFFFAOYSA-M 5-(1,3-dimethylpyridin-1-ium-4-yl)-3-methyl-1,2-oxazole;chloride Chemical compound [Cl-].O1N=C(C)C=C1C1=CC=[N+](C)C=C1C UXZUURWFPJSDNN-UHFFFAOYSA-M 0.000 description 2
- KWIMAVCVJKCEBU-UHFFFAOYSA-M 5-(1-methylpyridin-1-ium-4-yl)-3-(trifluoromethyl)-1,2-oxazole;chloride Chemical compound [Cl-].C1=C[N+](C)=CC=C1C1=CC(C(F)(F)F)=NO1 KWIMAVCVJKCEBU-UHFFFAOYSA-M 0.000 description 2
- NIUWIHHMSVUEBG-UHFFFAOYSA-M 5-[1-(2-methoxyethyl)pyridin-1-ium-4-yl]-3-methyl-1,2-oxazole;chloride Chemical compound [Cl-].C1=C[N+](CCOC)=CC=C1C1=CC(C)=NO1 NIUWIHHMSVUEBG-UHFFFAOYSA-M 0.000 description 2
- HBSFDLBBQBDFSK-UHFFFAOYSA-M 5-methyl-3-(1-methylpyridin-1-ium-4-yl)-1,2-oxazole;chloride Chemical compound [Cl-].O1C(C)=CC(C=2C=C[N+](C)=CC=2)=N1 HBSFDLBBQBDFSK-UHFFFAOYSA-M 0.000 description 2
- FHSZLDCMPCQJCD-UHFFFAOYSA-N 5-pyridin-4-yl-1,2-oxazole Chemical class O1N=CC=C1C1=CC=NC=C1 FHSZLDCMPCQJCD-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 2
- 229920001800 Shellac Polymers 0.000 description 2
- JPURMLDQZSNQDM-UHFFFAOYSA-M [Cl-].C(C=CC1=CC=CC=C1)[N+]1=CC=C(C=C1)C1=CC(=NO1)C Chemical compound [Cl-].C(C=CC1=CC=CC=C1)[N+]1=CC=C(C=C1)C1=CC(=NO1)C JPURMLDQZSNQDM-UHFFFAOYSA-M 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- HIMXGTXNXJYFGB-UHFFFAOYSA-N alloxan Chemical compound O=C1NC(=O)C(=O)C(=O)N1 HIMXGTXNXJYFGB-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 206010012601 diabetes mellitus Diseases 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 229940050176 methyl chloride Drugs 0.000 description 2
- 239000008024 pharmaceutical diluent Substances 0.000 description 2
- 239000004208 shellac Substances 0.000 description 2
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 2
- 229940113147 shellac Drugs 0.000 description 2
- 235000013874 shellac Nutrition 0.000 description 2
- JGRUAOFWYVZHSK-UHFFFAOYSA-N 1-(1-methylpyridin-1-ium-4-yl)butane-1,3-dione Chemical compound CC(CC(C1=CC=[N+](C)C=C1)=O)=O JGRUAOFWYVZHSK-UHFFFAOYSA-N 0.000 description 1
- BZZPMCZQQJWNTB-UHFFFAOYSA-N 1-pyridin-4-ylbutane-1,3-dione Chemical compound CC(=O)CC(=O)C1=CC=NC=C1 BZZPMCZQQJWNTB-UHFFFAOYSA-N 0.000 description 1
- AZKZKZZWBMNDRX-UHFFFAOYSA-M 3-ethyl-5-(1-ethylpyridin-1-ium-4-yl)-1,2-oxazole;iodide Chemical compound [I-].O1N=C(CC)C=C1C1=CC=[N+](CC)C=C1 AZKZKZZWBMNDRX-UHFFFAOYSA-M 0.000 description 1
- OSAHUXWJKABNOR-UHFFFAOYSA-N 3-ethyl-5-pyridin-4-yl-1,2-oxazole Chemical compound C(C)C1=NOC(=C1)C1=CC=NC=C1 OSAHUXWJKABNOR-UHFFFAOYSA-N 0.000 description 1
- IUTODWBSAVNRGS-UHFFFAOYSA-N 3-hydroxyimino-1-pyridin-4-ylbutan-1-one Chemical compound ON=C(C)CC(=O)C1=CC=NC=C1 IUTODWBSAVNRGS-UHFFFAOYSA-N 0.000 description 1
- FEYVPARNWKPPCO-UHFFFAOYSA-N 3-hydroxyimino-1-pyridin-4-ylpropan-1-one Chemical compound N1=CC=C(C=C1)C(CC=NO)=O FEYVPARNWKPPCO-UHFFFAOYSA-N 0.000 description 1
- VGLKHXJQMBGCCO-UHFFFAOYSA-M 3-methyl-5-(1-propylpyridin-1-ium-4-yl)-1,2-oxazole;bromide Chemical compound [Br-].C1=C[N+](CCC)=CC=C1C1=CC(C)=NO1 VGLKHXJQMBGCCO-UHFFFAOYSA-M 0.000 description 1
- SXPSZLCFGBQKQT-UHFFFAOYSA-N 3-methyl-5-pyridin-4-yl-1,2-oxazole Chemical compound O1N=C(C)C=C1C1=CC=NC=C1 SXPSZLCFGBQKQT-UHFFFAOYSA-N 0.000 description 1
- KZCHVARSEUSUSY-UHFFFAOYSA-N 3-oxo-3-pyridin-4-ylpropanal Chemical compound O=CCC(=O)C1=CC=NC=C1 KZCHVARSEUSUSY-UHFFFAOYSA-N 0.000 description 1
- VVFWWIMDNOGGLM-UHFFFAOYSA-N 4,4,4-trifluoro-1-pyridin-4-ylbutane-1,3-dione Chemical compound FC(F)(F)C(=O)CC(=O)C1=CC=NC=C1 VVFWWIMDNOGGLM-UHFFFAOYSA-N 0.000 description 1
- DDIDMTDFBQLYEI-UHFFFAOYSA-M 4-ethyl-5-(1-ethylpyridin-1-ium-4-yl)-1,2-oxazole chloride Chemical compound [Cl-].C(C)[N+]1=CC=C(C=C1)C1=C(C=NO1)CC DDIDMTDFBQLYEI-UHFFFAOYSA-M 0.000 description 1
- GIDVGKQJHUPTPG-UHFFFAOYSA-M 4-methyl-3-(1-methylpyridin-1-ium-4-yl)-1,2-oxazole chloride Chemical compound [Cl-].C[N+]1=CC=C(C=C1)C1=NOC=C1C GIDVGKQJHUPTPG-UHFFFAOYSA-M 0.000 description 1
- YTKIDKPLNIXPJT-UHFFFAOYSA-M 5-(1-ethylpyridin-1-ium-4-yl)-3-methyl-1,2-oxazole;iodide Chemical compound [I-].C1=C[N+](CC)=CC=C1C1=CC(C)=NO1 YTKIDKPLNIXPJT-UHFFFAOYSA-M 0.000 description 1
- NILFJBVBVUSIFG-UHFFFAOYSA-M 5-(1-methylpyridin-1-ium-4-yl)-1,2-oxazole;chloride Chemical compound [Cl-].C1=C[N+](C)=CC=C1C1=CC=NO1 NILFJBVBVUSIFG-UHFFFAOYSA-M 0.000 description 1
- MHSDCECGDFELAS-UHFFFAOYSA-M 5-[1-(cyclopropylmethyl)pyridin-1-ium-4-yl]-3-methyl-1,2-oxazole;bromide Chemical compound [Br-].O1N=C(C)C=C1C(C=C1)=CC=[N+]1CC1CC1 MHSDCECGDFELAS-UHFFFAOYSA-M 0.000 description 1
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229920002261 Corn starch Polymers 0.000 description 1
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- 208000007241 Experimental Diabetes Mellitus Diseases 0.000 description 1
- CCGVDIYLTIBFMP-UHFFFAOYSA-N FC(C1=NOC(=C1)C1=CC=NC=C1)(F)F Chemical compound FC(C1=NOC(=C1)C1=CC=NC=C1)(F)F CCGVDIYLTIBFMP-UHFFFAOYSA-N 0.000 description 1
- 241000287828 Gallus gallus Species 0.000 description 1
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 1
- 235000019483 Peanut oil Nutrition 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- JLRGJRBPOGGCBT-UHFFFAOYSA-N Tolbutamide Chemical compound CCCCNC(=O)NS(=O)(=O)C1=CC=C(C)C=C1 JLRGJRBPOGGCBT-UHFFFAOYSA-N 0.000 description 1
- NKJVPLMBHNFQLZ-UHFFFAOYSA-M [Br-].CCC[N+]1=CC=C(C=C1)C1=CC(CC)=NO1 Chemical compound [Br-].CCC[N+]1=CC=C(C=C1)C1=CC(CC)=NO1 NKJVPLMBHNFQLZ-UHFFFAOYSA-M 0.000 description 1
- ZNOMGOJIYCGOPM-UHFFFAOYSA-M [Cl-].C1(CC1)C[N+]1=CC=C(C=C1)C1=CC(=NO1)C Chemical compound [Cl-].C1(CC1)C[N+]1=CC=C(C=C1)C1=CC(=NO1)C ZNOMGOJIYCGOPM-UHFFFAOYSA-M 0.000 description 1
- IWCYLNHAGUYMSK-UHFFFAOYSA-M [Cl-].C[N+]1=CC=C(C=C1)C1=C(C(=NO1)C)C Chemical compound [Cl-].C[N+]1=CC=C(C=C1)C1=C(C(=NO1)C)C IWCYLNHAGUYMSK-UHFFFAOYSA-M 0.000 description 1
- ZVNPNWVWQYAVGS-UHFFFAOYSA-M [Cl-].C[N+]1=CC=C(C=C1)C1=C(C=NO1)C Chemical compound [Cl-].C[N+]1=CC=C(C=C1)C1=C(C=NO1)C ZVNPNWVWQYAVGS-UHFFFAOYSA-M 0.000 description 1
- DKXOSYKZLGSPDA-UHFFFAOYSA-M [I-].C[N+]1=CC=C(C=C1)C1=CC=NO1 Chemical compound [I-].C[N+]1=CC=C(C=C1)C1=CC=NO1 DKXOSYKZLGSPDA-UHFFFAOYSA-M 0.000 description 1
- 229940081735 acetylcellulose Drugs 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000013330 chicken meat Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000003240 coconut oil Substances 0.000 description 1
- 235000019864 coconut oil Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000008120 corn starch Substances 0.000 description 1
- 239000002385 cottonseed oil Substances 0.000 description 1
- 235000012343 cottonseed oil Nutrition 0.000 description 1
- 125000001316 cycloalkyl alkyl group Chemical group 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 210000001198 duodenum Anatomy 0.000 description 1
- 239000008157 edible vegetable oil Substances 0.000 description 1
- MDKXBBPLEGPIRI-UHFFFAOYSA-N ethoxyethane;methanol Chemical compound OC.CCOCC MDKXBBPLEGPIRI-UHFFFAOYSA-N 0.000 description 1
- 239000012054 flavored emulsion Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000008101 lactose Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229940127017 oral antidiabetic Drugs 0.000 description 1
- 239000006186 oral dosage form Substances 0.000 description 1
- 239000000312 peanut oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- XTUSEBKMEQERQV-UHFFFAOYSA-N propan-2-ol;hydrate Chemical compound O.CC(C)O XTUSEBKMEQERQV-UHFFFAOYSA-N 0.000 description 1
- AOJFQRQNPXYVLM-UHFFFAOYSA-N pyridin-1-ium;chloride Chemical compound [Cl-].C1=CC=[NH+]C=C1 AOJFQRQNPXYVLM-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000008159 sesame oil Substances 0.000 description 1
- 235000011803 sesame oil Nutrition 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000003826 tablet Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 229960005371 tolbutamide Drugs 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 125000004385 trihaloalkyl group Chemical group 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
- C07D417/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings
- C07D417/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
- C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
- C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D413/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D413/02—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings
- C07D413/04—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and oxygen atoms as the only ring hetero atoms containing two hetero rings directly linked by a ring-member-to-ring-member bond
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Plural Heterocyclic Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Isoxazolyl-pyridinium salts of the general formula:- - (I) where R = H, lower alkyl or trihalo-lower alkyl - R1 and R2 = H or lower alkyl - R3 = lower alkyl, lower alkenyl, ar(lower)-alkenyl, cycloalkyl(lower) alkyl or lower alkoxy (lower) alkyl. - Z = a trivalent radical selected from the group consisting of - represents one double bond. - X = a pharmaceutically acceptable anion (e.g. Cl, Br, I, etc.). - Compounds (I) show hypoglycaemic activity and are therefore useful in the lowering of blood sugar levels.
Description
Verfahren zur Herstellung von Isoxazolylpyridiniumsalzen Gegenstand der Erfindung ist ein Verfahren zur Herstellung von neuen Isoxazolylpyridiniumsalzen der Formel:
EMI0001.0000
<B>-</B> worin R ein Wasserstoffatom oder eine niedere Alkyl oder Trihalogenalkylgruppe, " R1 und R2, die untereinander gleich oder voneinander verschieden sein können, Wasserstoffatome oder nie dere Alkylreste und R3 einen niederen Alkyl-, niederen Alkenyl-, niederen Aralkenyl-, cycloalkylsubstituierten niederen Alkyl oder niederalkoxysubstituierten niederen Alkylrest be deuten und X ein pharmazeutisch annehmbares Anion bedeutet. Das Anion kann besipielsweise Chlorid, Bromid oder Jodid sein.
Diese Verbindungen sind im allgemeinen wasser lösliche kristalline Feststoffe.
Die beschriebenen neuen Verbindungen werden nach folgendem Verfahren hergestellt. Man setzt ein 1-(4-Pyridyl)-1,3-alkyldion oder ein Salz davon mit einem Hydroxylaminsalz um, überführt das dabei ge bildete 1-(4-Pyridyl)-1,3-alkyldion-3-oxim mit einer Verbindung R3X, zum Beispiel einem niederen Alkyl-, Alkenyl-, Aralkenyl-, Cycloalkylalkyl- oder Alkoxyal- kylhalogenid, in das. quaternäre Salz und dyclisiert die ses quaternäre Salz mit Hilfe einer Säure, wie Salz säure oder Essigsäure, unter Bildung eines 4-(5-Isoxa- zolyl)-pyridiniumsalzes.
EMI0001.0006
In den vorstehenden Formeln haben R, R" R2, R3 und X die oben angegebenen Bedeutungen.
Zu den nach dem erfindungsgemässen Verfahren erhältlichen Verbindungen gehören u. a.: 4-(3-Methyl-5-isoxazolyl)-pyridin, 4-(3-Äthyl-5-isoxazolyl)-pyridin, 4-(3-tert.-Butyl-5-isoxazolyl)-pyridin, 4-(3-Trifluormethyl-5-isoxazolyl)-pyridin, 4-(5-Isoxazolyl)-pyridin, 1-Methyl-4-(4-methyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Äthyl-4-(4-äthyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Methyl-4-(3-äthyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Allyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid,
1-Methyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Methyl-4-(5-methyl- 3-isoxazolyl)-pyridiniumchlorid, 1-Cinnamyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Cinnamyl-4-(5-isoxazolyl)-pyridiniodid, 1-Allyl-4-(5-äthyl- 3-isoxazolyl)-pyridiniumchlorid, 1-Methyl-4-(3-tert.-butyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Methyl-4-(3-trifluormethyl- 5-isoxazolyl)-pyridiniumchlorid, 1-(2-Methoxäthyl)
-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, 1-Cyclopropylmethyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, 1,3-Dimethyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid und 1-Methyl-4-(4-methyl- 3-isoxazolyl)-pyridiniumchlorid. Die nach dem erfindungsgemässen Verfahren er hältlichen Verbindungen zeigen hypoglykämische Wirksamkeit, aufgrund welcher sie sich als Mittel zur Erniedrigung des Blutzuckerspiegels eignen. Bei oraler Verabreichung der Verbindungen an normale Hühner wird eine Erniedrigung der Blutzuckerspiegel beobach tet.
Ausserdem wird bei einer oralen Verabreichung an Mäuse vor der Behandlung mit Alloxan (zur Erzeugung eines experimentellen Diabetes) der Blutzuckerspiegel beträchtlich herabgesetzt. Diese Wirkung tritt bei Dosierungen ein, die weit unter denen liegen, bei denen Anzeichen einer toxischen Wirkung festgestellt werden können. Im Gegensatz hierzu hat Tolbutamid, das am meisten angewandte orale Antidiabeticum bei Mäusen mit Alloxandiabetes keine Wirkung. Die Ergebnisse zeigen, dass die erfindungsgemäss erhältlichen Verbin dungen zur Behandlung von Diabetes bei Warmblütern eingesetzt werden können.
Die erfindungsgemäss erhältlichen Verbindungen können in verschiedenen Verarbeitungsformen ange wandt werden, z. B.als Tabletten, zu deren Herstellung der Wirkstoff mit herkömmlichen Tablettierungsstoffen wie Maisstärke, Lactose, Saccharose, Sorbit, Talcum, Stearinsäure, Magnesiumstearat, Dicalciumphosphat und Gummen und vergleichbaren Stoffen als, pharma zeutischen Verdünnungsmitteln oder Trägern vermischt wird. Die die neuen Wirkstoffe enthaltenden Tabletten oder Pillen können durch Schichtung oder andersartige bekannte Verarbeitung so ausgebildet werden, dass sie eine Dosierungsform mit protrahierter oder hinausge schobener Wirkung oder vorherbestimmter aufeinan derfolgenden Wirkung der darin eingeschlossenen Pharmaka ergeben.
Beispielsweise kann die Tablette oder Pille eine innere und eine äussere Dosierungs komponente umfassen, wobei die letztere die erste ein hüllt. Die beiden Komponenten können durch eine Schicht voneinander getrennt sein, die im Magen nicht angegriffen wird und es. ermöglicht, dass die innere Komponente unverändert in das Duodenum gelangt oder zumindest mit Verzögerung eingesetzt wird. Für solche Zwischenschichten oder Überzüge können die verschiedensten Stoffe verwendet werden, beispiels weise eine Reihe polymerer Säuren oder Gemische von polymeren Säuren mit Stoffen wie Schellack, Schellack und Cetylalkohol und Celluloseacetat.
Eine besonders vorteilhafte Zwischenschicht enthält ein Styrol-Malein säure-Mischpolymerisat neben anderen bekannten Stof fen, die zu den enteralen Eigenschaften des Überzugs beitragen.
Die flüssigen Formen, in die die erfindungsgemäss erhältlichen neuen Verbindungen zur Verabreichung eingebracht werden können, sind u. a. entsprechend aromatisierter Emulsionen mit Speiseölen wie Baum- wollsamenöl, Sesamöl, Kokosöl, Erdnussöl sowie Eli- xieren und ähnlichen pharmazeutischen Trägern. Für die parenterale Anwendung eignen sich sterile Suspen sionen oder Lösungen. Auch isotonische Zubereitun gen, die Konservierungsmittel enthalten, eignen sich sehr gut für Injektionen.
Die Bezeichnung Dosierungsform , wie sie hierin gebraucht wird, bezieht sich auf physikalisch diskrete Einheiten, die Warmblütern als Einheitsdosis verab reicht werden können, wobei jede Einheit eine vorbe stimmte Menge des, Wirkstoffs enthält, die so berechnet ist, dass < sie in Verbindung mit dem jeweils erforder lichen pharmazeutischen Verdünnungsmittel oder Trä ger die gewünschte therapeutische Wirkung ergibt.
Die Spezifikationen für die neuen Dosierungsformen sind direkt abhängig von (a) den besonderen Eigenschaften der neuen Wirkstoffe und der im einzelnen zu erzielen den therapeutischen Wirkung und (b) den bei der Her stellung von Formulierungen eines solchen Wirkstoffs für die therapeutische Anwendung bei Warmblütern beobachteten bekannten Beschränkungen. Beispiel für geeignete orale Dosierungsformen sind Tabletten, Kap seln, Pillen, mit Pulver gefüllte Päckchen, Granulate, Waffeln, Cachets, Teelöffelfüllungen, Tropferfüllungen, Ampullen und Flaschen sowie voneinander getrennte Vielfache solcher und ähnlicher Dosierungsformen.
<I>Beispiel 1</I> a) 4-Acetoacetylpyridin-B-oxim Eine Lösung von 24 g 4-Acetoacetylpyridin, 20 g Hydroxylaminhydrochlorid und 20 g Natriumcarbonat in 100 ml Wasser und 50 ml Äthanol wird eine halbe Stunde bei Zimmertemperatur gerührt. Die abgeschie dene feste Substanz wird gesammelt und aus Äthanol umkristallisiert. Man erhält farblose Kristalle vom F. _ 169-170 C.
b) 4-Acetoacetyl-l-methylpyridiniumchlorid-B-oxim Ein Gemisch aus 1 g 4-Acetoacetylpyridin-ss-oxim und 3 ml Methylchlorid wird 18 Stunden in einer Bombe auf 85 C erwärmt. Man lässt das überschüs sige Methylchlorid abdampfen und kristallisiert den festen Rückstand aus Methanol-Äther um. Man erhält Kristalle, die bei 194-195 C schmelzen.
c) 1-Methyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid Eine Lösung aus 0,1 g 4-Acetonacedyl-1-methylpyridiniumchlorid-ss-oxim und 2 ml Äthanol und 0,1 ml 3,8 n-äthanolischen Chlorwasserstoffs wird 3 Stunden zum Sieden unter Rückfluss erhitzt, abgekühlt, und mit Äther verdünnt. Man erhält eine farblose feste Substanz, die bei 250 bis 251 C (Zers.) nach Umkristallisieren aus Isopro- panol schmilzt; Amax 293m (in Methanol).
<I>Beispiel 2a</I> Herstellung von 1-(4-Pyridyl)-1,3-propandion-3-oxim Zu einer Lösung von 103 g (0,6 Mol) des Natrium salzes von 1-(4-Pyridyl)-1,3-propandion in 500 ml Wasser gibt man 44 g Hydroxylaminhydrochlorid. Nach. einigen Minuten wird die Lösung mit Natrium- carbonat auf pH 8 eingestellt, und die sich abschei dende feste Substanz wird abgetrennt. Durch Umkri stallisieren aus Methanol erhält man 52 g farblose Kri stalle, die bei 152 bis 153 C unter Zersetzung schmel zen.
<I>Beispiel 3a</I> Herstellung von 1-(4-Pyridyl)- 4,4,4-trifluor-1,3-butandion-3-oxim Eine Lösung aus 2,2 g (0,01 Mol) 1-(4-Pyridyl)-4,4,4-trifluor-1,3-butandion, 0,7 g Hydroxylaminhydrochlorid, 20 ml Äthanol, 5 ml Wasser und 0,7 g Natriumcarbonat wird 12 Stunden zum Sieden unter Rückfluss. erhitzt, auf ein Volumen von 5 ml eingeengt und mit Wasser verdünnt. Die sich abscheidende feste Substanz wird aus, Isopropylalko- hol-Wasser umkristallisirt. Dadurch erhält man 1,85 g farbloser Prismen, die bei 187 C schmelzen.
Nach demselben Verfahren können die folgenden Verbindungen hergestellt werden: 1-Methyl-4-(5-methyl- 3-isoxazolyl)-pyridiniumchlorid. farblose Kristalle vom Smp. 221-222 C (Zers.) aus Acetonitril; l-Methyl-4-(3-äthyl- 5-isoxazolyl)-pyridiniumchlorid, farblose Kristalle vom Smp., 200-201 C (Zers.) aus Isopropanol; 1-Allyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, blassgelbe Nadeln vom Smp. 87 C (Zerr.) aus Acetonitril; 1-n-Propyl-4-(3-methyl- 5-isoxazolyl)-pyridinium-bromid, farblose Kristalle vom Smp. 180-182 C aus Isopropanol;
1-Äthyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumjodid, gelbe Kristalle vom Smp. 193-194 C (Zers.) aus Isopropanol; 1-Cyclopropylmethyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumbromid., farblose Kristalle vom Smp. 165-166 C (Zers.) aus Acetonitril; 1-(2-Methoxyäthyl)-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, weissliche Kristalle vom Smp. 73-74 C aus Isopropa- nol, Amax 293 m (in Methanol); 1-Cinnamyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, strohfarbene Kristalle vom Smp. 109-112 C aus Acetonitril;
1-Methyl-4-(5-isoxazolyl)-pyridiniumchlorid, farblose Kristalle vom Smp. 182-183 C (Zers.) aus Acetonitril, 1-Methyl-4-(5-isoxazolyl)-pyridiniumjodid, bräunliche Kristalle vom Smp. 212-213 C (Zers.) aus Methanol,; 1-Äthyl-4-(3-äthyl- 5-isoxazolyl)-pyridiniumjodid, gelbe Kristalle vom Smp. 154 C (Zerr.) aus Isopropanol; 1-Methyl-4-(3,4-dimethyl- 5-isoxazolyl)-pyridiniumchlorid, farblose Kristalle, Amax 293 m (in Methanol'); 1-Methyl-4-(3-trifluormethyl- 5-isoxazolyl)-pyridiniumchlorid, farblose Kristalle vom Smp. 230 C (Zers.) aus Isopropanol;
1,3-Dimethyl-4-(3-methyl- 5-isoxazolyl)-pyridiniumchlorid, farblose Kristalle vom Smp. 246-247 C (Zers.) aus Acetonitril; 1-n-Propyl-4-(3-äthyl- 5-isoxazolyl)-pyridiniumbromid, farblose Nadeln vom Smp. 153 C aus Isopropanol.
Process for the preparation of isoxazolylpyridinium salts The invention relates to a process for the preparation of new isoxazolylpyridinium salts of the formula:
EMI0001.0000
<B> - </B> where R is a hydrogen atom or a lower alkyl or trihaloalkyl group, "R1 and R2, which can be the same or different from one another, are hydrogen atoms or lower alkyl radicals and R3 is a lower alkyl, lower alkenyl, lower Aralkenyl, cycloalkyl-substituted lower alkyl or lower alkoxy-substituted lower alkyl radicals and X is a pharmaceutically acceptable anion The anion can be, for example, chloride, bromide or iodide.
These compounds are generally water soluble crystalline solids.
The new compounds described are prepared by the following process. A 1- (4-pyridyl) -1,3-alkyldione or a salt thereof is reacted with a hydroxylamine salt, and the 1- (4-pyridyl) -1,3-alkyldione-3-oxime thus formed is converted with a compound R3X, for example a lower alkyl, alkenyl, aralkenyl, cycloalkylalkyl or alkoxyalkyl halide, into the quaternary salt and cyclizes this quaternary salt with the aid of an acid such as hydrochloric acid or acetic acid to form a 4- ( 5-isoxazolyl) pyridinium salt.
EMI0001.0006
In the above formulas, R, R ", R2, R3 and X have the meanings given above.
The compounds obtainable by the process according to the invention include u. a .: 4- (3-methyl-5-isoxazolyl) -pyridine, 4- (3-ethyl-5-isoxazolyl) -pyridine, 4- (3-tert.-butyl-5-isoxazolyl) -pyridine, 4- (3-Trifluoromethyl-5-isoxazolyl) -pyridine, 4- (5-isoxazolyl) -pyridine, 1-methyl-4- (4-methyl-5-isoxazolyl) -pyridinium chloride, 1-ethyl-4- (4-ethyl - 5-isoxazolyl) pyridinium chloride, 1-methyl-4- (3-ethyl- 5-isoxazolyl) -pyridinium chloride, 1-allyl-4- (3-methyl-5-isoxazolyl) -pyridinium chloride,
1-methyl-4- (3-methyl-5-isoxazolyl) -pyridinium chloride, 1-methyl-4- (5-methyl-3-isoxazolyl) -pyridinium chloride, 1-cinnamyl-4- (3-methyl-5-isoxazolyl ) pyridinium chloride, 1-cinnamyl-4- (5-isoxazolyl) pyridine iodide, 1-allyl-4- (5-ethyl- 3-isoxazolyl) -pyridinium chloride, 1-methyl-4- (3-tert.-butyl- 5-isoxazolyl) pyridinium chloride, 1-methyl-4- (3-trifluoromethyl- 5-isoxazolyl) pyridinium chloride, 1- (2-methoxyethyl)
-4- (3-methyl- 5-isoxazolyl) -pyridinium chloride, 1-cyclopropylmethyl-4- (3-methyl- 5-isoxazolyl) -pyridinium chloride, 1,3-dimethyl-4- (3-methyl-5-isoxazolyl) pyridinium chloride and 1-methyl-4- (4-methyl-3-isoxazolyl) pyridinium chloride. The compounds obtainable by the process according to the invention show hypoglycemic activity, which makes them suitable as agents for lowering blood sugar levels. When the compounds are administered orally to normal chickens, a decrease in blood sugar levels is observed.
In addition, when administered orally to mice prior to treatment with alloxan (to produce experimental diabetes), blood sugar levels are significantly reduced. This effect occurs at doses well below those at which signs of a toxic effect can be found. In contrast, tolbutamide, the most widely used oral antidiabetic in mice with alloxan diabetes, has no effect. The results show that the compounds obtainable according to the invention can be used for the treatment of diabetes in warm-blooded animals.
The compounds obtainable according to the invention can be applied in various processing forms, eg. B. as tablets, for the production of which the active ingredient is mixed with conventional tabletting substances such as corn starch, lactose, sucrose, sorbitol, talc, stearic acid, magnesium stearate, dicalcium phosphate and gums and similar substances as pharmaceutical diluents or carriers. The tablets or pills containing the new active ingredients can be formed by layering or other known processing so that they result in a dosage form with a protracted or delayed effect or a predetermined successive effect of the pharmaceuticals enclosed therein.
For example, the tablet or pill can comprise an inner and an outer dosage component, the latter enveloping the former. The two components can be separated from each other by a layer that is not attacked in the stomach and it. enables the inner component to enter the duodenum unchanged or at least to be inserted with a delay. A wide variety of substances can be used for such intermediate layers or coatings, for example a number of polymeric acids or mixtures of polymeric acids with substances such as shellac, shellac and cetyl alcohol and cellulose acetate.
A particularly advantageous intermediate layer contains a styrene-maleic acid copolymer in addition to other known substances that contribute to the enteral properties of the coating.
The liquid forms into which the novel compounds obtainable according to the invention can be introduced for administration are i.a. a. appropriately flavored emulsions with edible oils such as cotton seed oil, sesame oil, coconut oil, peanut oil as well as elixirs and similar pharmaceutical carriers. Sterile suspensions or solutions are suitable for parenteral use. Isotonic preparations that contain preservatives are also very suitable for injections.
The term dosage form, as used herein, refers to physically discrete units that can be administered to warm-blooded animals as a unit dose, each unit containing a predetermined amount of the active ingredient calculated to be used in connection with the each required pharmaceutical diluent or carrier gives the desired therapeutic effect.
The specifications for the new dosage forms are directly dependent on (a) the special properties of the new active ingredients and the individual therapeutic effects to be achieved and (b) the known values observed in the preparation of formulations of such an active ingredient for therapeutic use in warm-blooded animals Restrictions. Examples of suitable oral dosage forms are tablets, capsules, pills, powder-filled packets, granules, wafers, cachets, teaspoon fillings, dropper fillings, ampoules and bottles, as well as separate multiples of such and similar dosage forms.
<I> Example 1 </I> a) 4-Acetoacetylpyridine-B-oxime A solution of 24 g of 4-acetoacetylpyridine, 20 g of hydroxylamine hydrochloride and 20 g of sodium carbonate in 100 ml of water and 50 ml of ethanol is stirred for half an hour at room temperature. The deposited solid substance is collected and recrystallized from ethanol. Colorless crystals of F. 169-170 C. are obtained.
b) 4-Acetoacetyl-1-methylpyridinium chloride-B-oxime A mixture of 1 g of 4-acetoacetylpyridine-β-oxime and 3 ml of methyl chloride is heated to 85 ° C. in a bomb for 18 hours. The excess methyl chloride is allowed to evaporate and the solid residue is recrystallized from methanol-ether. Crystals are obtained which melt at 194-195 ° C.
c) 1-Methyl-4- (3-methyl-5-isoxazolyl) -pyridinium chloride A solution of 0.1 g of 4-acetoneacedyl-1-methylpyridinium chloride-ss-oxime and 2 ml of ethanol and 0.1 ml of 3.8 n Ethanolic hydrogen chloride is refluxed for 3 hours, cooled, and diluted with ether. A colorless solid substance is obtained which, after recrystallization from isopropanol, melts at 250 to 251 C (decomp.); Amax 293m (in methanol).
<I> Example 2a </I> Preparation of 1- (4-pyridyl) -1,3-propanedione-3-oxime To a solution of 103 g (0.6 mol) of the sodium salt of 1- (4-pyridyl ) -1,3-propanedione in 500 ml of water is added to 44 g of hydroxylamine hydrochloride. To. The solution is adjusted to pH 8 with sodium carbonate for a few minutes and the solid substance which separates out is separated off. By recrystallizing from methanol, 52 g of colorless crystals are obtained, which melt at 152 to 153 ° C. with decomposition.
<I> Example 3a </I> Preparation of 1- (4-pyridyl) - 4,4,4-trifluoro-1,3-butanedione-3-oxime A solution of 2.2 g (0.01 mol) 1 - (4-Pyridyl) -4,4,4-trifluoro-1,3-butanedione, 0.7 g of hydroxylamine hydrochloride, 20 ml of ethanol, 5 ml of water and 0.7 g of sodium carbonate is refluxed for 12 hours. heated, concentrated to a volume of 5 ml and diluted with water. The solid substance which separates out is recrystallized from isopropyl alcohol-water. This gives 1.85 g of colorless prisms that melt at 187 C.
The following compounds can be prepared by the same procedure: 1-methyl-4- (5-methyl-3-isoxazolyl) pyridinium chloride. colorless crystals with a melting point of 221-222 ° C. (decomp.) from acetonitrile; 1-methyl-4- (3-ethyl-5-isoxazolyl) -pyridinium chloride, colorless crystals of melting point, 200-201 C (decomp.) from isopropanol; 1-allyl-4- (3-methyl-5-isoxazolyl) pyridinium chloride, pale yellow needles with a melting point of 87 ° C. (Zerr.) From acetonitrile; 1-n-propyl-4- (3-methyl-5-isoxazolyl) pyridinium bromide, colorless crystals with a melting point of 180-182 ° C. from isopropanol;
1-ethyl-4- (3-methyl-5-isoxazolyl) pyridinium iodide, yellow crystals of m.p. 193-194 ° C. (decomp.) From isopropanol; 1-Cyclopropylmethyl-4- (3-methyl-5-isoxazolyl) -pyridinium bromide., Colorless crystals with a melting point of 165-166 ° C. (decomp.) From acetonitrile; 1- (2-methoxyethyl) -4- (3-methyl-5-isoxazolyl) pyridinium chloride, whitish crystals with a melting point of 73-74 C from isopropanol, Amax 293 m (in methanol); 1-cinnamyl-4- (3-methyl-5-isoxazolyl) pyridinium chloride, straw-colored crystals with a melting point of 109-112 ° C. from acetonitrile;
1-Methyl-4- (5-isoxazolyl) -pyridinium chloride, colorless crystals with a melting point of 182-183 C (decomp.) From acetonitrile, 1-methyl-4- (5-isoxazolyl) -pyridinium iodide, brownish crystals with a melting point of 212 -213 C (dec.) From methanol; 1-ethyl-4- (3-ethyl-5-isoxazolyl) -pyridinium iodide, yellow crystals with a melting point of 154 ° C. (Zerr.) From isopropanol; 1-methyl-4- (3,4-dimethyl-5-isoxazolyl) pyridinium chloride, colorless crystals, Amax 293 m (in methanol '); 1-methyl-4- (3-trifluoromethyl-5-isoxazolyl) -pyridinium chloride, colorless crystals with a melting point of 230 ° C. (decomp.) From isopropanol;
1,3-dimethyl-4- (3-methyl-5-isoxazolyl) pyridinium chloride, colorless crystals of melting point 246-247 C (decomp.) From acetonitrile; 1-n-propyl-4- (3-ethyl-5-isoxazolyl) -pyridinium bromide, colorless needles with a melting point of 153 ° C. from isopropanol.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53571466A | 1966-03-21 | 1966-03-21 | |
| CH408167A CH505137A (en) | 1966-03-21 | 1967-03-21 | Process for the preparation of isoxazolylpyridinium salts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH509343A true CH509343A (en) | 1971-06-30 |
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ID=25694597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH729770A CH509343A (en) | 1966-03-21 | 1967-03-21 | Isoxazolyl-pyridinium salts having hypoglycaemic |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH509343A (en) |
-
1967
- 1967-03-21 CH CH729770A patent/CH509343A/en not_active IP Right Cessation
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