CH450414A - Process for the preparation of benzo (a) quinolizine derivatives - Google Patents
Process for the preparation of benzo (a) quinolizine derivativesInfo
- Publication number
- CH450414A CH450414A CH704063A CH704063A CH450414A CH 450414 A CH450414 A CH 450414A CH 704063 A CH704063 A CH 704063A CH 704063 A CH704063 A CH 704063A CH 450414 A CH450414 A CH 450414A
- Authority
- CH
- Switzerland
- Prior art keywords
- formula
- benzo
- dihydro
- ethyl
- dimethoxy
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 12
- 238000002360 preparation method Methods 0.000 title claims description 4
- RMOYSWDTCQZJGS-UHFFFAOYSA-N 6h-benzo[a]quinolizine Chemical class C1=CC=CN2CC=C(C=CC=C3)C3=C21 RMOYSWDTCQZJGS-UHFFFAOYSA-N 0.000 title description 3
- 150000001875 compounds Chemical class 0.000 claims description 13
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000005984 hydrogenation reaction Methods 0.000 claims description 7
- 239000007858 starting material Substances 0.000 claims description 7
- 125000003342 alkenyl group Chemical group 0.000 claims description 6
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 150000001450 anions Chemical class 0.000 claims description 5
- 239000007795 chemical reaction product Substances 0.000 claims description 4
- NKSZCPBUWGZONP-UHFFFAOYSA-N 3,4-dihydroisoquinoline Chemical class C1=CC=C2C=NCCC2=C1 NKSZCPBUWGZONP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- YDZIFJMWOCAKAO-UHFFFAOYSA-N 3-ethyl-9,10-dimethoxy-2-methyl-6,7-dihydrobenzo[a]quinolizin-5-ium Chemical class CC=1C(=C[N+]=2CCC3=C(C2C1)C=C(C(=C3)OC)OC)CC YDZIFJMWOCAKAO-UHFFFAOYSA-N 0.000 claims description 2
- QCRCVAMGUZYIKG-UHFFFAOYSA-N 6,7-dihydrobenzo[a]quinolizin-5-ium Chemical class C1=CC=C2CC[N+]3=CC=CC=C3C2=C1 QCRCVAMGUZYIKG-UHFFFAOYSA-N 0.000 claims description 2
- 229910052783 alkali metal Inorganic materials 0.000 claims description 2
- 150000001340 alkali metals Chemical class 0.000 claims description 2
- 238000003776 cleavage reaction Methods 0.000 claims description 2
- 230000007017 scission Effects 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 2
- 125000002471 4H-quinolizinyl group Chemical class C=1(C=CCN2C=CC=CC12)* 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 239000000243 solution Substances 0.000 description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 10
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 229960000583 acetic acid Drugs 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 3
- VKQSJVGUTKKLAD-UHFFFAOYSA-M quinolizin-5-ium;bromide Chemical compound [Br-].C1=CC=CC2=CC=CC=[N+]21 VKQSJVGUTKKLAD-UHFFFAOYSA-M 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- CWIBEJSBTZBSCH-UHFFFAOYSA-M [Br-].CC=1C(=C[N+]=2CCC3=C(C2C1)C=C(C(=C3)OC)OC)CC Chemical compound [Br-].CC=1C(=C[N+]=2CCC3=C(C2C1)C=C(C(=C3)OC)OC)CC CWIBEJSBTZBSCH-UHFFFAOYSA-M 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000002026 chloroform extract Substances 0.000 description 2
- 238000006264 debenzylation reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- XXLZPUYGHQWHRN-RPBOFIJWSA-N dehydroemetine Chemical compound COC1=C(OC)C=C2[C@@H]3CC(C[C@@H]4C5=CC(OC)=C(OC)C=C5CCN4)=C(CC)CN3CCC2=C1 XXLZPUYGHQWHRN-RPBOFIJWSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 150000004681 metal hydrides Chemical class 0.000 description 2
- UKVIEHSSVKSQBA-UHFFFAOYSA-N methane;palladium Chemical compound C.[Pd] UKVIEHSSVKSQBA-UHFFFAOYSA-N 0.000 description 2
- -1 methylenedioxy group Chemical group 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Chemical compound [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- GUOHRXPYGSKUGT-UHFFFAOYSA-N quinolizinium Chemical class C1=CC=CC2=CC=CC=[N+]21 GUOHRXPYGSKUGT-UHFFFAOYSA-N 0.000 description 2
- UWDOBVKRBKUGSJ-UHFFFAOYSA-N 2-benzyl-6,7-dimethoxy-3,4-dihydroisoquinolin-2-ium Chemical class C=1C=2C=C(OC)C(OC)=CC=2CC[N+]=1CC1=CC=CC=C1 UWDOBVKRBKUGSJ-UHFFFAOYSA-N 0.000 description 1
- 206010001986 Amoebic dysentery Diseases 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- BUXOXCZWTSOYOC-UHFFFAOYSA-M [Br-].C1=CC=C[N+]=2C=CC3=C(C1=2)C=CC=C3 Chemical compound [Br-].C1=CC=C[N+]=2C=CC3=C(C1=2)C=CC=C3 BUXOXCZWTSOYOC-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000005530 alkylenedioxy group Chemical group 0.000 description 1
- 239000002246 antineoplastic agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229940127089 cytotoxic agent Drugs 0.000 description 1
- 125000001891 dimethoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- PSLIMVZEAPALCD-UHFFFAOYSA-N ethanol;ethoxyethane Chemical compound CCO.CCOCC PSLIMVZEAPALCD-UHFFFAOYSA-N 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- ZYCMDWDFIQDPLP-UHFFFAOYSA-N hbr bromine Chemical compound Br.Br ZYCMDWDFIQDPLP-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical group 0.000 description 1
- 229910000042 hydrogen bromide Inorganic materials 0.000 description 1
- 229910000039 hydrogen halide Inorganic materials 0.000 description 1
- 239000012433 hydrogen halide Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- SHLPPXXKRFINFY-UHFFFAOYSA-N isoquinolin-2-ium;bromide Chemical compound Br.C1=NC=CC2=CC=CC=C21 SHLPPXXKRFINFY-UHFFFAOYSA-N 0.000 description 1
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical class C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 1
- BRMYZIKAHFEUFJ-UHFFFAOYSA-L mercury diacetate Chemical compound CC(=O)O[Hg]OC(C)=O BRMYZIKAHFEUFJ-UHFFFAOYSA-L 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- QXKXDIKCIPXUPL-UHFFFAOYSA-N sulfanylidenemercury Chemical compound [Hg]=S QXKXDIKCIPXUPL-UHFFFAOYSA-N 0.000 description 1
- 125000005270 trialkylamine group Chemical group 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D455/00—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
- C07D455/03—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
- C07D455/04—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine
- C07D455/06—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine containing benzo [a] quinolizine ring systems
- C07D455/08—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine containing benzo [a] quinolizine ring systems having an isoquinolyl-1, a substituted isoquinolyl-1 or an alkylenedioxyisoquinolyl-1 radical linked through only one carbon atom, attached in position 2, e.g. emetine
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D455/00—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
- C07D455/03—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine
- C07D455/04—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine
- C07D455/06—Heterocyclic compounds containing quinolizine ring systems, e.g. emetine alkaloids, protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing quinolizine ring systems directly condensed with at least one six-membered carbocyclic ring, e.g. protoberberine; Alkylenedioxy derivatives of dibenzo [a, g] quinolizines, e.g. berberine containing a quinolizine ring system condensed with only one six-membered carbocyclic ring, e.g. julolidine containing benzo [a] quinolizine ring systems
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
Verfahren zur Herstellung von Benzo [a]chinolizinderivaten Die vorliegende Erfindung bezieht sich auf ein Ver fahren zur Herstellung von Benzo[a]chinolizinderivaten der Formel
EMI0001.0005
worin R Wasserstoff, eine niedrere Alkyl- oder Alkenyl- gruppe, beispielsweise eine solche mit 1 bis 4 Kohlen stoffatomen, insbesondere die Methyl- und die Äthyl- gruppe, R1,
R2 und R3 niedere Alkyl'gruppen, insbeson dere d!ne Methyl- bzw. Äthylgruppe, und m und n die Werte 1 bis 4 bedeuten, wobei zwei benachbarte Grup pen R10 und bzw. oder R30 zusammen auch eine Alkylendioxygruppe, beispielsweise die Methylendioxy- gruppe, bilden können.
Das erfindungsgemässe Verfahren ist dadurch ge kennzeichnet, dass man ein. 6,7-D.ihydro-benzo[a]chin- oliziniumsalz der Formel
EMI0001.0032
worin Y- das Äquivalent eines Anions bedeutet, mit einem 3,4-Dihydroisochinoliniumsal'z der Formel
EMI0001.0035
worin R4 eine Aralkylgruppe, insbesondere die Blenzyl- gruppe, oder eine niedere Alkyl'- oder Alkenyl'gruppe und Z- das Äquivalent eines Anions darstellt,
umsetzt und das vor oder nach der Abspaltung einer all'fälli'g vorhandenen Aralkylgruppe R4 erhaltene Produkt im Ring C hydriert.
Die nach dem erfindungsgemässen Verfahren als Endprodukte erhältlichen Verbindungen der allgemeinen Formel I sind zum grössten Teil bekannte Verbindungen. Unter diese Verbindungsgruppe fällt beispielsweise das 2-Dehydroemetin, welches ein hervorragendes Chemo- therapeutikum zur Bekämpfung der Amöbenruhr und der Bilharziosis darstellt.
Diejenigen Verbindungen der Formel I, in weilchen R eine Alkenylgruppe ist, sind neu.
Die Verbindungen der allgemeinen Formel 1I sind bekannte Substanzen.
Verbindungen der allgemeinen Formel 11I, in wel chen R4 eine Alkyl- oder Aralkylgruppe ist, sind eben falls bekannt, während diejenigen Verbindungen der Formel 11I, in welchen R eine Alkenylgruppe ist,
neue Verbindungen darstellen. Diese 2 - Al'kenyl - iso - chinolinsumverbindungen können durch N-Alkenylierung entsprechender N-unsubstituierter Isochinoliniumverbin- dungen gewonnen werden.
Bei Umsetzung der 6,7-Dihydro-benzo[a]chinolizi- niumsalze der allgemeinen Formel 1I mit den 3,4-Di- hydroisochinoliniumsalzen der Formel III gelangt man vorerst zu 2-[(1',2',3',4'-Tetrahydro-l'-isochsnolinyl) methyl]-6,7-dihydro-benzo[a]chinolizinium- verbind'ungen mit einem Kation der allgemeinen Formel
EMI0002.0001
Diese Verbindungen sind durchwegs neue Substanzen.
Die zu den Kationen der obigen Formeln Il, III und IV gehörigen Anionen können verschiedener organischer oder anorganischer Säuren, beispielsweise von Halogen wasserstoffsäuren, Schwefelsäure, Perchlorsäure., Essig säure, Oxalsäure oder dergleichen sein. Besonders bevor zugt sind das Chlorid-, das Bromid- und das Perchlor- ation.
Bei Durchführung des erfindungsgemässen Verfah rens verwendet man vorzugsweise als Ausgangsverbin dung der Formel 1I ein 2-Mehyl-3-äbhyl-6,7-dihydro-9,10-dimethoxy- benzo[a]chinoliziniumsalz, beispielsweise das Chinoliziniumbromid, und als Aus gangsverbindung der Formel III ein 2-Benzyl-3,4- dihydro-6,7-dimethoxy-isochinoliniumsalz, beispielsweise das Isochinoliniumbromid. Durch die Umsetzung dieser beiden Verbindungen gelangt man zum 2-[(2'-Benzyl-6',7'-dimethoxy-1',2',3',4' tetrahydro-1'-isochinolinyl)-methyl]-3-äthyl 9,
10-dimethoxy-6,7-dihyd'ro- benzo[a]chinoliziniumbromid, aus welchem man durch Debenzylierung und' Hydrierung bzw. Hydrierung und Debenzylierung das 2-Dehyd@ro- emetin erhält.
Die Umsetzung der Ausgangsverbindungen wird vorzugsweise in einem basischen Medium durchgeführt. Als besonders vorteilhaft hat es sich erwiesen, die Um setzung in einem wässrigen basischen Medium, wie bei spielsweise in einer wässrigen Lösung eines Trialkyl- amins, beispielsweise in einer wässrigen Lösung von Trimethylamin, durchzuführen. Die Umsetzung kann innerhalb eines weiten Temperaturbereiches erfolgen.
Vorzugsweise wird die Umsetzung jedoch bei einer Tem peratur zwischen etwa 20 C und etwa 50 C durch geführt.
Die Hydrierung der Umsetzungsprodukte erfolgt zweckmässig mittels Metallhydriden, welche in wässriger oder alkoholischer Lösung verwendbar sind. Insbeson- d'ere kommen als derartige Metallhydride Alkalimetall- borhydride, wie beispielsweise Natriumborhyd'rid', in Frage.
Die Abspaltung einer Arallkylgruppe R.4, welche, wie bereits oben angegeben wurde, entweder vor oder nach der Hydrierung des Ringes C ausgeführt werden kann, wird zweckmässig durch katalytische Hydrierung bewirkt. Hierbei wird vorzugsweise als Katalysator Palladium-Kohle oder Platin verwendet.
<I>Beispiel 1</I> Es werden<B>9,10</B> g 2-Methyl-3-äthyl-6,7-dihydro-9,10-dimethoxy- benzo[a]chinoliziniumbromid und 9,05 g 2-Be.nzyl-3,4-dihydro-6,7-dimiethoxy-iso- chinöliniumbromid zusammen in 100 ml Wasser gelöst, worauf die Lösung im Eisbad auf 0 C gekühlt wird. Zu dieser Lösung gibt man 150 ml 40% ige wässrige Trime.thylaminlösung hinzu und lässt dann die Lösung sich auf Raumtemperatur erwärmen.
Nach 15 bis 30 Minuten beginnt das 2-[(2'-Benzyl-6',7'-dimethoxy-1',2',3',4' tetrahydro-1'-isochinolinyl)-methyl]-3-äthyl 9,10-dimethoxy-6,7-dihydro- benzo[a]chino'.iziniumbromid nach vorherigem Animpfen auszukristallisieren. Man rührt noch etwa 2 bis 3 Stunden bei Raumtemperatur und filtriert dann ab.
Nach dem Waschen mit wässriger Trimethylaminlösung und mit Wasser und nach dem Trocknen im Vakuum erhält man 11,4 g blassgelbe Kristalle, welche sich bei etwa 150 C zu zersetzen beginnen. UV-Maxima in Feinsprit 230 (Schulter), 287,372 m,u. a - 10-3 = 21,8,<B>17,1,</B> 13,6.
Anstelle von wässriger Trimethylaminlösung kann man auch eine 2n wässrige Natriumhydroxydlösung ver wenden, welche man in einer Menge von 25 ml der Lösung der Ausgangsverbindungen langsam zutropfen lässt. Das Reaktionsprodukt fällt hierbei gewöhnlich ölig aus und kristallisiert nur sehr langsam.
Das so erhaltene 2-[(2'-Benzyl-6',7'-dimethoxy-1',2',3',4'-tetrahydro 1'-isochinolyl)-methyl]-3-äthyl-9,10 dimethoxy-6,7-dihydro-benzo[a]chinolizinium- bromid wird durch Hydrierung mit Natriumborhydrid in das 2-[(2'-Benzyl-6,7-dimethoxy-1',2', 3',4'-tetrahydro 1'-isochinolyl)-methyl]-3-äthyl-9,10-dimethoxy- 1,4,6,7-tetrahydro-benzo[a]chinolizin übergeführt.
Das hierbei als Ausgangsmaterial verwendete 2-Methyl-3-äthyl-6,7-dihydro-9,10-dimethoxy- benzo[a]chinoliziniumbromid kann wie folgt erhalten werden: Es werden 4 g 2-Methyl-3-äthyl-9,10-dimethoxy- 1,4, 6,7 - tetrahyd'ro-11 bH-benzo[a]chi@nolizinhydrochlori d in Wasser gelöst und mit einer Natriumhydroxydlösung versetzt. Die gebildete Base wird hierauf in Chloroform aufgenommen und das Lösungsmittel abgedampft.
Der verbleibende Rückstand wird in 200 ml<B>10</B> % iger Essig säure gelöst und die Lösung wird nach Zugabe von 18 g Quecksilber-II-acetat 16 Stunden auf 40 C erwärmt. Das hierbei ausfallende Ouecksilber-I-acetat wird ab- filtriert und das Filtrat mit Schwefelwasserstoff behan- deIt. Sodann wird vom ausgeschiedenen Quecksilber- sulfid abfiltriert und das Filtrat auf 20 bis 30 ml im Vakuum
eingeengt. Zu dieser eingeengten Lösung gibt man 2 ml 63 % iger Bromwasserstoffsäure hinzu, wonach 2-Methyl-3-äthyl-6,7-dihydro-9,10-d'imethoxy- benzo[a]chinol'iziniumbromid auskristallisiert. Nach dem Abfiltriere.n und Umkristalli- sieren aus Äthanol-Äther erhält man 3,3 g des Benzo[a]chinoliziniumbromids vom Schmelzpunkt 245 C.
Das entsprechende Perchlorat weist einen Schmelz punkt von 243 bis 244 C auf. <I>Beispiel 2</I> Es werden 3,32 g des nach Beispiel 1 erhaltenen 2-[(2'-Benzy2-6',7'-dlimethoxy-1',2',3',4'-tetrahyd!ro 1'-isochinolinyl)-methyl]-3-äthyl-9,10L- dimethoxy-6,7-d ihydro-benzo[a]chinalizinium:- bromids in 20 ml Eisessig unter Vermittlung von 1 g 5 % iger Palladium-Kohle bei 60 C unter Wasserstoffnormal- druck hydriert.
Nach Aufnahme der theoretischen Menge Wasserstoff wird vom Katalysator abfiltriert. Das Filtrat wird hierauf mit 0,7 ml 63 % iger wässriger Bromwasserstoffsäure versetzt und im Vakuum bei etwa 40 C eingedampft. Aus einer Lösung des Rückstandes in wenig Äthanol kristallisiert das 2-[(6',7'-Dimcthoxy-1',2',3',4'-tetrahydro, 1'-isochinolyl)-methyl]-3-äthyl-9,10-dämethoxy- 6,7-dihyd'ro,-benzo[a]chinobzin umbromid- hydrobromid spontan aus.
Es wird auf 0 C abgekühlt und filtriert, wobei man 1,85 g dieser Substanz mit einem Zer setzungspunkt von etwa 1801 bis 185 C erhält. UV- Maxima in Feinsprit: max 230 (Schulter), 268 (Schulter), 285 und 365 m,u. e <I>-</I> 10-3 = 23,5, 11,9, 18,2, 15,8.
Die so erhalten-, Verbindung wird in Analogie zu Beispiel 1 mittels Natriumborhydrid zum 2-[(6',7'-Dimethoxy-1',2', 3',4'-tetrahydro 1'-isochinolyl)-methyl]-3-äthyl-9,10-dimethoxy- 1,4,6,7-tetrahydro-benzo[a]chinolizin hydriert.
<I>Beispiel 3</I> Es werden 3 g des nach Beispiel 1 erhaltenen 2-[(2'-Benzyl-6',7'-dimethoxy-1',2',3',4'- tetrahydro-1'-isochinol@inyl)-methy1]-3-äthyl= 9,10-dimethoxy-6,7dihydro-benzo[a]chin- oliziniumbromid in einer Lösung von 0,375g Bromwasserstoff in 37,5 ml Methanol gelöst.
Zu dieser Lösung tropft man unter Eiskühlung eine Lösung von 3 g Natriumborhydrid in 10 ml Wasser in einem Zeitraum von 20 Minuten langsam zu. Nach etwa 30 Minuten dampft man im Vakuum ein und verteilt den erhaltenen Rückstand zwischen Wasser und Benzol.
Hierauf wird' der Benzol extrakt eingedampft und der Rückstand in 30 ml Eisessig gelöst und in Gegenwart von 1,5 g 5%iger Palqadium-Kohle bei 60 C unter Normal'wasserstoff- d'ruck hydriert. Nach Aufhören der Wasserstoffaufnahme wird der Katalysator abfiltriert und das Filtrat im Vakuum eingedampft.
Der erhaltene Rückstand wird hierauf zwischen Chloroform und verdünnter Natrium- hydroxydlösung verteilt. Der Chloroformextrakt wird im Vakuum eingedampft und der erhaltene Rückstand in 12 ml Methanol gelöst und mit 1,35 g wasserfreier Oxalsäure versetzt. Es kristallisieren 1,70, g saures Oxalat des 2-Dehydro-emetins aus.
Die Kristalle werden abfiltriert, das Filtrat im Vakuum eingeengt und der Rückstand zwischen Chloroform und verdünnter Na- triumhydroxydlösung verteilt. Der Chloroformextrakt wird wiederum im Vakuum eingeengt und der Rückstand in Methanol gelöst und mit methanolischer Salzsäure sauer gestellt. Nach Zugabe von Äther bis zur Trübung <RTI
ID="0003.0096"> kristallisieren 0,80 g 2-Dehydro-emetin-dihydrochlorid aus.
<I>Beispiel 4</I> Es werden 1,092 g 2-Methyl-3-äthyt 6,7-dihydro-9,10-dimethoxy- benzo[a]chino#liziniumbromid und 0,936 g 2-A11!yl-3,4-dihyd@ro-6,7-dimethoxy-iso- chinoliniumbromid zusammen in 10 ml Wasser gelöst. Zu dieser Lösung gibt man 15 ml 40% wässrige Tri- methylaminlösung und lässt die Lösung 3 Tage bei Raumtemperatur stehen.
Das 2-[(2'-Al!lyl-6',7'-dimethoxy-1',2',3',4' tetrahydro-1'-isochinolyl)-methyl1-3-äthyl 9,10-dimet'hoxy-6,7-dihydro- benzo@[a]chinoliziniumbromid kristallisiert dabei aus. Man filtriert es ab und wäscht es mit wässriger Trim@ethylaminlösung und- mit Wasser. Man erhält 0,45 g blassgelbe Kristalle, welche sich bei etwa 170 C zu zersetzen beginnen.
Durch Auflösen dieses Salzes, in einem kleinen Überschuss alkoholischer Bromwasserstoffsäure und Zu geben von Aceton und Äther verhält man das 2[(2'-Allyl,-6',7'-d'imethoxy-1',2',3',4'- tetrahydro-1'-isochinolinyl)-methyli]-3-äthyl 9,10-dimethoxy-6,7-dihydro@- benzo[a]chinoliziniumbromid-hydrobromid (Blassgelbe Kristalle: Zersetzung ab 220 C).
Durch Hydrierung dieser Verbindung mit Natrium- borhydrid erhält man 2-[2'-Allyl-6',7'-dimethaxy-1',2',3',4'- tetrahydro# l'-isochinolyl)-methyl#]-3-äthyl 9,10-dimethoxy-1,4,6,7-tetra'hyd,ro- benzo[a]chinalizin.
Process for the preparation of benzo [a] quinolizine derivatives The present invention relates to a process for the preparation of benzo [a] quinolizine derivatives of the formula
EMI0001.0005
wherein R is hydrogen, a lower alkyl or alkenyl group, for example one with 1 to 4 carbon atoms, in particular the methyl and the ethyl group, R1,
R2 and R3 are lower alkyl groups, in particular a methyl or ethyl group, and m and n are the values 1 to 4, where two adjacent groups R10 and / or R30 together also represent an alkylenedioxy group, for example the methylenedioxy group, can form.
The inventive method is characterized in that one. 6,7-D.ihydro-benzo [a] quinolizinium salt of the formula
EMI0001.0032
wherein Y- is the equivalent of an anion with a 3,4-dihydroisoquinolinium salt of the formula
EMI0001.0035
where R4 is an aralkyl group, in particular the blenzyl group, or a lower alkyl or alkenyl group and Z is the equivalent of an anion,
and the product obtained in ring C before or after the cleavage of any aralkyl group R4 present is hydrogenated.
The compounds of general formula I obtainable as end products by the process according to the invention are for the most part known compounds. This group of compounds includes, for example, 2-dehydroemetin, which is an excellent chemotherapeutic agent for combating amoebic dysentery and bilharziosis.
Those compounds of the formula I in which some R is an alkenyl group are new.
The compounds of the general formula 1I are known substances.
Compounds of the general formula 11I in which R4 is an alkyl or aralkyl group are also known, while those compounds of the formula 11I in which R is an alkenyl group
represent new connections. These 2-alkenyl-iso-quinoline compounds can be obtained by N-alkenylation of corresponding N-unsubstituted isoquinolinium compounds.
When the 6,7-dihydro-benzo [a] quinolizinium salts of the general formula 1I are reacted with the 3,4-dihydroisoquinolinium salts of the formula III, 2 - [(1 ', 2', 3 ', 4 '-Tetrahydro-l'-isochsnolinyl) methyl] -6,7-dihydro-benzo [a] quinolizinium compounds with a cation of the general formula
EMI0002.0001
These compounds are all new substances.
The anions belonging to the cations of the above formulas II, III and IV can be various organic or inorganic acids, for example hydrogen halide acids, sulfuric acid, perchloric acid., Acetic acid, oxalic acid or the like. The chloride, bromide and perchlorate ions are particularly preferred.
When carrying out the process according to the invention, a 2-methyl-3-ethyl-6,7-dihydro-9,10-dimethoxybenzo [a] quinolizinium salt, for example quinolizinium bromide, is preferably used as the starting compound of the formula 1I, and as the starting compound of the formula III is a 2-benzyl-3,4-dihydro-6,7-dimethoxy-isoquinolinium salt, for example isoquinolinium bromide. The reaction of these two compounds leads to 2 - [(2'-benzyl-6 ', 7'-dimethoxy-1', 2 ', 3', 4 'tetrahydro-1'-isoquinolinyl) methyl] -3- ethyl 9,
10-dimethoxy-6,7-dihydrobenzo [a] quinolizinium bromide, from which 2-dehydroemetin is obtained by debenzylation and hydrogenation or hydrogenation and debenzylation.
The reaction of the starting compounds is preferably carried out in a basic medium. It has proven to be particularly advantageous to carry out the reaction in an aqueous basic medium, such as, for example, in an aqueous solution of a trialkylamine, for example in an aqueous solution of trimethylamine. The reaction can take place within a wide temperature range.
However, the reaction is preferably carried out at a temperature between about 20 ° C. and about 50 ° C.
The reaction products are advantageously hydrogenated by means of metal hydrides, which can be used in aqueous or alcoholic solution. Particularly suitable metal hydrides of this type are alkali metal borohydrides, such as, for example, sodium borohydride.
The splitting off of an aralkyl group R.4, which, as already stated above, can be carried out either before or after the hydrogenation of the ring C, is expediently brought about by catalytic hydrogenation. Palladium-carbon or platinum is preferably used as the catalyst.
<I> Example 1 </I> There are <B> 9.10 </B> g of 2-methyl-3-ethyl-6,7-dihydro-9,10-dimethoxybenzo [a] quinolizinium bromide and 9, 05 g of 2-Be.nzyl-3,4-dihydro-6,7-dimiethoxy-isochinöliniumbromid dissolved together in 100 ml of water, whereupon the solution is cooled to 0 C in an ice bath. 150 ml of 40% strength aqueous trimethylamine solution are added to this solution and the solution is then allowed to warm to room temperature.
After 15 to 30 minutes the 2 - [(2'-Benzyl-6 ', 7'-dimethoxy-1', 2 ', 3', 4 'tetrahydro-1'-isoquinolinyl) methyl] -3-ethyl 9 begins To crystallize out 10-dimethoxy-6,7-dihydrobenzo [a] quino'.izinium bromide after prior seeding. The mixture is stirred for about 2 to 3 hours at room temperature and then filtered off.
After washing with aqueous trimethylamine solution and with water and after drying in vacuo, 11.4 g of pale yellow crystals are obtained, which begin to decompose at about 150.degree. UV maxima in fine spirit 230 (shoulder), 287.372 m, u. a - 10-3 = 21.8, 17.1, 13.6.
Instead of aqueous trimethylamine solution, a 2N aqueous sodium hydroxide solution can also be used, which is slowly added dropwise in an amount of 25 ml of the solution of the starting compounds. The reaction product usually precipitates as an oily product and crystallizes only very slowly.
The 2 - [(2'-benzyl-6 ', 7'-dimethoxy-1', 2 ', 3', 4'-tetrahydro 1'-isoquinolyl) methyl] -3-ethyl-9,10 dimethoxy obtained in this way -6,7-dihydro-benzo [a] quinolizinium bromide is converted into the 2 - [(2'-benzyl-6,7-dimethoxy-1 ', 2', 3 ', 4'-tetrahydro 1) by hydrogenation with sodium borohydride '-isoquinolyl) methyl] -3-ethyl-9,10-dimethoxy-1,4,6,7-tetrahydro-benzo [a] quinolizine converted.
The 2-methyl-3-ethyl-6,7-dihydro-9,10-dimethoxybenzo [a] quinolizinium bromide used here as starting material can be obtained as follows: 4 g of 2-methyl-3-ethyl-9, 10-dimethoxy-1,4,6,7-tetrahyd'ro-11 bH-benzo [a] chi @ nolizinhydrochlori d dissolved in water and treated with a sodium hydroxide solution. The base formed is then taken up in chloroform and the solvent is evaporated off.
The remaining residue is dissolved in 200 ml of 10% acetic acid and the solution is heated to 40 ° C. for 16 hours after adding 18 g of mercury (II) acetate. The silver I-acetate which precipitates out is filtered off and the filtrate is treated with hydrogen sulfide. The precipitated mercury sulfide is then filtered off and the filtrate is reduced to 20 to 30 ml in vacuo
constricted. 2 ml of 63% hydrobromic acid are added to this concentrated solution, after which 2-methyl-3-ethyl-6,7-dihydro-9,10-d'imethoxy-benzo [a] quinol'izinium bromide crystallizes out. After filtering off and recrystallizing from ethanol-ether, 3.3 g of benzo [a] quinolizinium bromide with a melting point of 245 ° C. are obtained.
The corresponding perchlorate has a melting point of 243 to 244 C. <I> Example 2 </I> 3.32 g of the 2 - [(2'-Benzy2-6 ', 7'-dimethoxy-1', 2 ', 3', 4'-tetrahyd ! ro 1'-isoquinolinyl) methyl] -3-ethyl-9,10L-dimethoxy-6,7-dihydro-benzo [a] quinalizinium: - bromides in 20 ml glacial acetic acid with the mediation of 1 g 5% palladium Coal hydrogenated at 60 C under normal hydrogen pressure.
After the theoretical amount of hydrogen has been absorbed, the catalyst is filtered off. The filtrate is then treated with 0.7 ml of 63% strength aqueous hydrobromic acid and evaporated at about 40 ° C. in vacuo. The 2 - [(6 ', 7'-Dimcthoxy-1', 2 ', 3', 4'-tetrahydro, 1'-isoquinolyl) methyl] -3-ethyl-9 crystallizes from a solution of the residue in a little ethanol , 10-demethoxy-6,7-dihyd'ro, -benzo [a] quinobzine bromide hydrobromide spontaneously.
It is cooled to 0 C and filtered, 1.85 g of this substance with a decomposition point of about 1801 to 185 C being obtained. UV maxima in fine spirits: max 230 (shoulder), 268 (shoulder), 285 and 365 m, u. e <I> - </I> 10-3 = 23.5, 11.9, 18.2, 15.8.
The compound obtained in this way is converted to 2 - [(6 ', 7'-dimethoxy-1', 2 ', 3', 4'-tetrahydro 1'-isoquinolyl) methyl] -3 using sodium borohydride in analogy to Example 1 -ethyl-9,10-dimethoxy-1,4,6,7-tetrahydro-benzo [a] quinolizine hydrogenated.
<I> Example 3 </I> 3 g of the 2 - [(2'-benzyl-6 ', 7'-dimethoxy-1', 2 ', 3', 4'-tetrahydro-1 '-isoquinol @ inyl) -methy1] -3-ethyl = 9,10-dimethoxy-6,7dihydro-benzo [a] quinolizinium bromide dissolved in a solution of 0.375 g of hydrogen bromide in 37.5 ml of methanol.
A solution of 3 g of sodium borohydride in 10 ml of water is slowly added dropwise to this solution over a period of 20 minutes while cooling with ice. After about 30 minutes, it is evaporated in vacuo and the residue obtained is partitioned between water and benzene.
The benzene extract is then evaporated and the residue is dissolved in 30 ml of glacial acetic acid and hydrogenated in the presence of 1.5 g of 5% palladium-carbon at 60 ° C. under normal hydrogen pressure. After the uptake of hydrogen has ceased, the catalyst is filtered off and the filtrate is evaporated in vacuo.
The residue obtained is then partitioned between chloroform and dilute sodium hydroxide solution. The chloroform extract is evaporated in vacuo and the residue obtained is dissolved in 12 ml of methanol and treated with 1.35 g of anhydrous oxalic acid. 1.70 g of acidic oxalate of 2-dehydroemetine crystallize out.
The crystals are filtered off, the filtrate is concentrated in vacuo and the residue is partitioned between chloroform and dilute sodium hydroxide solution. The chloroform extract is again concentrated in vacuo and the residue is dissolved in methanol and acidified with methanolic hydrochloric acid. After adding ether until turbidity <RTI
ID = "0003.0096"> 0.80 g of 2-dehydroemetine dihydrochloride crystallize out.
<I> Example 4 </I> There are 1.092 g of 2-methyl-3-ethyte 6,7-dihydro-9,10-dimethoxybenzo [a] quino # lizinium bromide and 0.936 g of 2-A11! Yl-3, 4-dihyd @ ro-6,7-dimethoxy-iso-quinolinium bromide dissolved together in 10 ml of water. 15 ml of 40% aqueous trimethylamine solution are added to this solution and the solution is left to stand for 3 days at room temperature.
The 2 - [(2'-Al! Lyl-6 ', 7'-dimethoxy-1', 2 ', 3', 4 'tetrahydro-1'-isoquinolyl) -methyl1-3-ethyl 9,10-dimet' hoxy-6,7-dihydrobenzo @ [a] quinolizinium bromide crystallizes out. It is filtered off and washed with aqueous trimethylamine solution and with water. 0.45 g of pale yellow crystals are obtained, which begin to decompose at about 170.degree.
By dissolving this salt in a small excess of alcoholic hydrobromic acid and adding acetone and ether, the 2 [(2'-allyl, -6 ', 7'-d'imethoxy-1', 2 ', 3', 4 '- tetrahydro-1'-isoquinolinyl) methyli] -3-ethyl 9,10-dimethoxy-6,7-dihydro @ - benzo [a] quinolizinium bromide hydrobromide (pale yellow crystals: decomposition from 220 ° C.).
Hydrogenation of this compound with sodium borohydride gives 2- [2'-allyl-6 ', 7'-dimethaxy-1', 2 ', 3', 4'-tetrahydro # l'-isoquinolyl) -methyl #] - 3-ethyl 9,10-dimethoxy-1,4,6,7-tetrahyd, ro-benzo [a] quinalizine.
Claims (1)
Priority Applications (24)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH704163A CH442316A (en) | 1963-06-07 | 1963-06-07 | Process for the preparation of benzo (a) quinolizine derivatives |
| CH704063A CH450414A (en) | 1963-06-07 | 1963-06-07 | Process for the preparation of benzo (a) quinolizine derivatives |
| DE19641445895 DE1445895C (en) | 1963-06-07 | 1964-04-20 | Process for the preparation of 2 dehydroemetine derivatives |
| NL6405025A NL6405025A (en) | 1963-06-07 | 1964-05-06 | |
| SE05726/64A SE326448B (en) | 1963-06-07 | 1964-05-11 | |
| NL6405645A NL125065C (en) | 1963-06-07 | 1964-05-21 | |
| BR159689/64A BR6459689D0 (en) | 1963-06-07 | 1964-06-03 | PROCESS FOR THE PREPARATION OF BENZO (A) QUINOLIZINE DERIVATIVES |
| BR159690/64A BR6459690D0 (en) | 1963-06-07 | 1964-06-03 | PROCESS FOR THE PREPARATION OF BENZO (A) QUINOLIZINE DERIVATIVES |
| FR976838A FR1403940A (en) | 1963-06-07 | 1964-06-03 | Process for the preparation of benzo [a] quinolizine derivatives |
| SE6717/64A SE315284B (en) | 1963-06-07 | 1964-06-03 | |
| BE648824D BE648824A (en) | 1963-06-07 | 1964-06-04 | |
| FR976990A FR1403941A (en) | 1963-06-07 | 1964-06-04 | Process for the preparation of benzo [a] quinolizine derivatives |
| BE648823D BE648823A (en) | 1963-06-07 | 1964-06-04 | |
| GB45825/65A GB1041698A (en) | 1963-06-07 | 1964-06-05 | Novel 3,4-dihydro-isoquinolinium salts |
| GB23337/64A GB1042205A (en) | 1963-06-07 | 1964-06-05 | Manufacture of benzo[a]quinolizines |
| US373043A US3359264A (en) | 1963-06-07 | 1964-06-05 | Benzo[a] quinolizine derivatives and processes for the manufacture thereof |
| GB45824/65A GB1041697A (en) | 1963-06-07 | 1964-06-05 | Novel 6,7-dihydro-benzo[a]quinolizinium salts and a process for the preparation thereof |
| GB18814/66A GB1041699A (en) | 1963-06-07 | 1964-06-05 | Novel tetrahydro isoquinolinyl-methyldihydrobenzo[a]quinolizinium salts |
| GB23336/64A GB1041696A (en) | 1963-06-07 | 1964-06-05 | Manufacture of benzo[a]quinolizines |
| GB46933/65A GB1042206A (en) | 1963-06-07 | 1964-06-05 | Benzo[a]quinolizine amides and the preparation thereof |
| ES300712A ES300712A1 (en) | 1963-06-07 | 1964-06-06 | PROCEDURE FOR THE PREPARATION OF BENZO DERIVATIVES [A] QUINOLIZIN |
| DK285264AA DK107558C (en) | 1963-06-07 | 1964-06-08 | Process for the preparation of benzo (a) quinolizine derivatives. |
| DK285364AA DK123358B (en) | 1963-06-07 | 1964-06-08 | Process for the preparation of benzo [a] quinolizine derivatives. |
| OA51056A OA00961A (en) | 1963-06-07 | 1964-12-26 | Process for the preparation of benzo (a) quinolizine derivatives. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH704063A CH450414A (en) | 1963-06-07 | 1963-06-07 | Process for the preparation of benzo (a) quinolizine derivatives |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH450414A true CH450414A (en) | 1968-01-31 |
Family
ID=4318976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH704063A CH450414A (en) | 1963-06-07 | 1963-06-07 | Process for the preparation of benzo (a) quinolizine derivatives |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH450414A (en) |
| DK (1) | DK107558C (en) |
| ES (1) | ES300712A1 (en) |
| OA (1) | OA00961A (en) |
-
1963
- 1963-06-07 CH CH704063A patent/CH450414A/en unknown
-
1964
- 1964-06-06 ES ES300712A patent/ES300712A1/en not_active Expired
- 1964-06-08 DK DK285264AA patent/DK107558C/en active
- 1964-12-26 OA OA51056A patent/OA00961A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| OA00961A (en) | 1968-08-07 |
| DK107558C (en) | 1967-06-12 |
| ES300712A1 (en) | 1964-11-16 |
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