CH527213A - Antimicrobial substituted 2-amino-5-nitroth - Google Patents
Antimicrobial substituted 2-amino-5-nitrothInfo
- Publication number
- CH527213A CH527213A CH519070A CH519070A CH527213A CH 527213 A CH527213 A CH 527213A CH 519070 A CH519070 A CH 519070A CH 519070 A CH519070 A CH 519070A CH 527213 A CH527213 A CH 527213A
- Authority
- CH
- Switzerland
- Prior art keywords
- amino
- nitrothiazole
- radicals
- trimethyl
- reaction
- Prior art date
Links
- 230000000845 anti-microbial effect Effects 0.000 title abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 6
- 239000002253 acid Substances 0.000 claims abstract description 5
- 229910003439 heavy metal oxide Inorganic materials 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 6
- 125000005843 halogen group Chemical group 0.000 claims description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 3
- 150000007522 mineralic acids Chemical class 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- LNCZEVUDJZSPKB-UHFFFAOYSA-N C=NC=1SC(=CN1)[N+](=O)[O-] Chemical compound C=NC=1SC(=CN1)[N+](=O)[O-] LNCZEVUDJZSPKB-UHFFFAOYSA-N 0.000 claims description 2
- 125000003342 alkenyl group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 230000001419 dependent effect Effects 0.000 claims 1
- 241000224526 Trichomonas Species 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 3
- MIHADVKEHAFNPG-UHFFFAOYSA-N 2-Amino-5-nitrothiazole Chemical compound NC1=NC=C([N+]([O-])=O)S1 MIHADVKEHAFNPG-UHFFFAOYSA-N 0.000 abstract description 2
- 229940018167 2-amino-5-nitrothiazole Drugs 0.000 abstract description 2
- NWYYWIJOWOLJNR-UHFFFAOYSA-N 2-Amino-3-methyl-1-butanol Chemical compound CC(C)C(N)CO NWYYWIJOWOLJNR-UHFFFAOYSA-N 0.000 abstract 1
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 abstract 1
- GGWJFTHFCOPBSY-UHFFFAOYSA-N 4-nitro-1,3-thiazol-2-amine Chemical compound NC1=NC([N+]([O-])=O)=CS1 GGWJFTHFCOPBSY-UHFFFAOYSA-N 0.000 abstract 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 229950003476 aminothiazole Drugs 0.000 abstract 1
- HUTKTGWEGLEDDP-UHFFFAOYSA-N n-methyl-5-nitro-1,3-thiazol-2-amine Chemical compound CNC1=NC=C([N+]([O-])=O)S1 HUTKTGWEGLEDDP-UHFFFAOYSA-N 0.000 abstract 1
- 230000000802 nitrating effect Effects 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 241001465754 Metazoa Species 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- -1 aliphatic alcohols Chemical class 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- 210000003754 fetus Anatomy 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 241000699670 Mus sp. Species 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 238000011785 NMRI mouse Methods 0.000 description 2
- 239000013543 active substance Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 229910000464 lead oxide Inorganic materials 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UCSJYZPVAKXKNQ-HZYVHMACSA-N streptomycin Chemical compound CN[C@H]1[C@H](O)[C@@H](O)[C@H](CO)O[C@H]1O[C@@H]1[C@](C=O)(O)[C@H](C)O[C@H]1O[C@@H]1[C@@H](NC(N)=N)[C@H](O)[C@@H](NC(N)=N)[C@H](O)[C@H]1O UCSJYZPVAKXKNQ-HZYVHMACSA-N 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GRNGQBPTWDNTIA-UHFFFAOYSA-N (5-nitro-1,3-thiazol-2-yl)carbamodithioic acid Chemical compound [O-][N+](=O)C1=CN=C(S1)N=C(S)S GRNGQBPTWDNTIA-UHFFFAOYSA-N 0.000 description 1
- DRMPZGSUZYWPGC-UHFFFAOYSA-N 1,1-dichloro-N-(5-nitro-1,3-thiazol-2-yl)methanimine Chemical compound ClC(Cl)=NC=1SC(=CN1)[N+](=O)[O-] DRMPZGSUZYWPGC-UHFFFAOYSA-N 0.000 description 1
- VYMPLPIFKRHAAC-UHFFFAOYSA-N 1,2-ethanedithiol Chemical compound SCCS VYMPLPIFKRHAAC-UHFFFAOYSA-N 0.000 description 1
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 1
- PMIAXZGCKWNUAL-UHFFFAOYSA-N 4,5,5-trimethyl-n-(5-nitro-1,3-thiazol-2-yl)-4h-1,3-oxazol-2-amine Chemical compound O1C(C)(C)C(C)N=C1NC1=NC=C([N+]([O-])=O)S1 PMIAXZGCKWNUAL-UHFFFAOYSA-N 0.000 description 1
- 229930182555 Penicillin Natural products 0.000 description 1
- JGSARLDLIJGVTE-MBNYWOFBSA-N Penicillin G Chemical compound N([C@H]1[C@H]2SC([C@@H](N2C1=O)C(O)=O)(C)C)C(=O)CC1=CC=CC=C1 JGSARLDLIJGVTE-MBNYWOFBSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241001502500 Trichomonadida Species 0.000 description 1
- BWGYJQNBPQRELA-UHFFFAOYSA-N [N+](=O)([O-])C1=CN=C(S1)N=C1SCCS1 Chemical compound [N+](=O)([O-])C1=CN=C(S1)N=C1SCCS1 BWGYJQNBPQRELA-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000007059 acute toxicity Effects 0.000 description 1
- 231100000403 acute toxicity Toxicity 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000001572 anti-trichomonad Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000003115 biocidal effect Effects 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- WNFIPDDMRXBMAF-UHFFFAOYSA-N chloromethyl N-(5-nitro-1,3-thiazol-2-yl)methanimidothioate Chemical compound ClCSC=NC=1SC(=CN1)[N+](=O)[O-] WNFIPDDMRXBMAF-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 230000002140 halogenating effect Effects 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 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
- 238000011534 incubation Methods 0.000 description 1
- 239000012442 inert solvent Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229940049954 penicillin Drugs 0.000 description 1
- 239000000825 pharmaceutical preparation Substances 0.000 description 1
- 230000000144 pharmacologic effect Effects 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 210000002966 serum Anatomy 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229960005322 streptomycin Drugs 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000001973 thioglycolate broth Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 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
- C07D417/12—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 linked by a chain containing hetero atoms as chain links
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
- A61K31/425—Thiazoles
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/04—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps to be fastened or secured by the material of the label itself, e.g. by thermo-adhesion
- G09F3/06—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps to be fastened or secured by the material of the label itself, e.g. by thermo-adhesion by clamping action
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Public Health (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Pharmacology & Pharmacy (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Thiazole And Isothizaole Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Antimicrobial substd. 2-amino-5-nitrothiazole. 2-(4:5:-Trimethyl-1:3-oxazolidinylidene-(2))-amino-5-nitrothiaz- ole, and its acid addition salts, is particularly effective against Trichomonas. It may be prepd. (a) by reaction between a 2-methylamino-5-nitrothiazole and a substd. 2-amino-3-methylbutanol (3), the reaction taking place, if necessary, in the presence of a heavy metal oxide which forms complexes of low solubility with the mercaptan, (b) by reaction at low temp. or 100 degrees C between a mercapto-4:5:5-trimethyl-DELTA 2-oxazoline and 2-aminonitrothiazole, and (c) by nitrating 2-4:5:5-trimethyl-2-oxazolidinylidene)-amino-thi azole with a mixture of concentrated H2SO4 and HNO3 at between 0 degree C and ambient temp.
Description
Verfahren zur Herstellung von 2-[(4,5,5-Trimethyl-1,3-oxazolidinyliden-(2))amino]-5-nitrothiazo1 Die Erfindung betrifft ein Verfahren zur Herstellung des neuen 2-[(4,5,5-Trimethyl-1,3-oxazolidinyliden-(2))amino]- 5-nitrothiazols der Formel 1
EMI0001.0002
sowie dessen physiologisch verträgliche Säureadditionssalze mit anorganischen oder organischen Säuren.
Die neue Verbindung lässt sich erfindungsgemäss nach dem folgenden Verfahren herstellen: Umsetzung von substituierten 2-Methylenamino-5-nitrothiazolen der Formel 2 -S-R3
EMI0001.0003
in der die Reste R1 und R2, die gleich oder verschieden sein können, Halogenatome oder Reste der Formel -S-R3 bedeu ten, in der R3 eine Alkyl-, Aralkyl- oder Alkenylgruppe dar stellt, wobei die Reste R1 und R2 auch zusammen eine Bismer- captoalkylengruppe mit einem Alkylenrest mit 1,2 oder 3 Kohlenstoffatomen sein können, mit 2-Amino-3-methyl- butanol-(3), gegebenenfalls in Anwesenheit eines Schwerme talloxids, welches mit Mercaptanen schwerlösliche Komplexe bildet, zum Beispiel in Anwesenheit von Bleioxid (Pb0).
Die Umsetzung erfolgt bei Zimmertemperatur oder erhöh ten Temperaturen, zweckmässig in Gegenwart eines Lösungs mittels, sie kann jedoch auch ohne Lösungsmittel durchgeführt werden. Als Lösungsmittel sind beispielsweise wasserhaltige oder wasserfreie aliphatische Alkohole oder Ketone geeignet. Verbindungen der Formel 2, in der einer der Reste oder die beiden Reste R1 und R2 Halogenatome darstellen, werden vorzugsweise in wasserfreien Äthern, so zum Beispiel in Dio- xan umgesetzt. Die erforderliche Temperatur hängt von der Reaktivität der Reste R1 und R2 ab und liegt vorzugsweise zwischen 0 und 100 C.
Der Zusatz von Schwermetalloxiden, zum Beispiel von Bleioxid, ist vor allem dann von Vorteil, wenn in den umzusetzenden Verbindungen der Formel 2 die Reste R1 und/oder R2 Reste schwerflüchtiger Mercaptane sind.
Das 2-[(4,5,5-Trimethyl-2-oxazolidinyliden)-amino]-5- nitrothiazol lässt sich in an sich bekannter Weise in seine Säu readditionssalze mit anorganischen oder organischen Säuren überführen. Als Säuren kommen zum Beispiel Salzsäure, Bromwasserstoffsäure, Schwefelsäure oder Essigsäure in Betracht.
Die als Ausgangsstoffe verwendeten Verbindungen der Formel 2, in der die Reste R1 und R2 substituierte Mercapto- gruppen bedeuten, lassen sich zum Beispiel auf folgende Weise herstellen: Aus 2-Amino-5-nitro-thiazol wird mit Schwefelkohlenstoff in Anwesenheit einer Base in einem polaren Lösungsmittel das entsprechende Salz des 2-(Bismercapto-methylenamino)-5- nitrothiazols hergestellt, welches anschliessend zu einer Ver bindung der Formel 2, gegebenenfalls stufenweise, zum Bei spiel mit Alkyl-, Aralkyl- oder Alkenylhalogeniden, umgesetzt wird. Die Herstellung dieser Ausgangssubstanz wird auch im Deutschen Bundespatent ........
(Deutsche Patentanmeldung P 16 95 911.8) beschrieben.
Verbindungen der Formel 2, in welchen einer der Reste R4 oder R5 ein Halogenatom darstellt, lassen sich aus 2-[(Bisalkyl- mercaptomethylen)-amino]-5-nitro-thiazolen durch Einwir kung eines Halogens unter Erwärmen in Anwesenheit eines halogenierten Lösungsmittels, wie zum Beispiel Tetrachlorkoh lenstoff, erhalten. Nach Beendigung der Reaktion wird das Lösungsmittel entfernt und der meist ölige Rückstand vor zugsweise mit Äther zur Kristallisation gebracht.
Soll in der so erhaltenen Verbindung der Formel 2 auch der zweite Rest R1 oder R= durch ein Halogenatom ersetzt werden, so geschieht dies unter Einwirkung eines stärkeren Halogenierungsmittels, zum Beispiel eines Phosphorpentahalogenids, bei erhöhten Temperaturen (vgl. auch Deutsches Bundespatent .... [Deut sche Patentanmeldung P 16 95 910.7]).
Das 2-Amino-3-methyl-butanol-(3) ist literaturbekannt und kann nach W. Pfleiderer und H. Zondler, Chem. Ber. 99, Seite 3014 (1966) hergestellt werden.
Die neue Verbindung besitzt wertvolle pharmakologische Eigenschaften. Sie ist antimikrobiell wirksam und wirkt beson ders gut gegen Trichomonaden.
Die Antitrichomonadenwirkung wurde an männlichen NMRI-Mäusen geprüft, welche vorher mit Trichomonas foetus infiziert wurden. Als Nährmedium für Trichomonas foetus diente eine Thioglykolatbouillon mit 10% Pferdeserum und Antibiotikazusatz (500 I.E. Penicillin/ml und 0,2 mg Strepto- mycin/ml) mit einem pH-Wert von 7,0. Die Bebrütungszeit von Trichomonas foetus in diesem Nährmedium betrug 24 Stunden bei 37 C.
Von dieser Lösung, die so verdünnt wurde, dass bei 320- facher Vergrösserung ca. 8 bis 10 Keime im Blickfeld des Mikroskops auszumachen waren, wurden jeweils 0,5 ml i.p. an Gruppen von je 6 Mäusen appliziert. Die infizierten Tiere bekamen 3 Tage lang täglich 2mal 50 mg/kg Wirksubstanz, erstmals 2 Stunden post infectionem, peroral verabreicht. Es wurde nach einer Beobachtungszeit von 28 Tagen die Zahl der überlebenden Tiere bestimmt. Unbehandelte Kontrolltiere starben nach 4-5 Tagen. Es wurde gefunden, dass bei einer Dosis von 50 mg/kg bei oraler Application jeweils 6 von 6 Tieren nach 28 Tagen überlebten.
Die akute Toxizität wurde an Gruppen von je 10 männ lichen NMRI-Mäusen pro Dosis bestimmt. Die Mäuse hatten ein durchschnittliches Körpergewicht von 18-20 g. Es wurde dabei gefunden, dass die Wirksubstanz untoxisch ist, ihre LD50 liegt über 4 g/kg bei peroraler Verabreichung.
Die folgenden Beispiele sollen die Erfindung näher erläu tern: Beispiel <I>1</I> 24,9 g (0,1 Mol) 2-(Bismethyhmercapto-methylenamino)-5- nitrothiazol werden in 700 ml n-Butanol heiss gelöst und 10,3 g (0,1 Mol) 2-Amino-3-methyl-butanol-(3) zugesetzt. Die Mischung wird 4 Stunden unter Rückfluss erwärmt. Nach dem Abkühlen werden die Kristalle abgesaugt und aus Äthanol umkristallisiert.
Schmelzpunkt: 218 C Ausbeute: 17 g (62% der Theorie). Beispiel <I>2</I> 9,9 g (0,04 Mol) 2-(5-Nitro-2-thiazolylimino)-1,3-dithiacy- clopentan und 13,5 g (0,06 Mol) Bleioxid (PbO) werden in 500 ml Äthanol aufgeschlämmt, 4 g (0,04 Mol) 2-Amino-3- methyl-butanol-(3) zugesetzt und unter Rühren und Rückfluss 3 Stunden gekocht. Der Ansatz wird noch heiss von dem ent standenen Bleisalz des 1,2-Äthylendithiols abgesaugt und das Filtrat im Vakuum eingedampft. Das Rohprodukt wird aus Äthanol mehrfach umkristallisiert.
Schmelzpunkt: 218 C Ausbeute: 4,1 g (40% der Theorie). Beispiel <I>3</I> 6,15 g (0,03 Mol) 2-[(Chlor-methylmercapto-methylen)- amino]-5-nitrothiazol werden in 30 ml wasserfreiem Dioxan gelöst und unter Eiskühlung 3 g (0,03 Mol) 2-Amino-3- methyl-butanol-(3) zugetropft. Man lässt auf Zimmertempera tur kommen und noch 5 Stunden stehen. Zuletzt wird die Lösung noch 1/2 Stunde auf dem Wasserbad erwärmt. Nach dem Eindampfen erhält man eine dunkelbraune Schmiere, die beim Verreiben mit Essigester teilweise kristallisiert. Das Rohpro dukt wird aus Äthanol umkristallisiert.
Schmelzpunkt: 217 C. Beispiel <I>4</I> 2-[(Dichlormethylen)-amino]-5-nitrothiazol wird in einem inerten Lösungsmittel, zum Beispiel Dioxan, gelöst und unter Eiskühlung die berechnete Menge 2-Amino-3-methyl-butanol- (3), in Dioxan gelöst, zugetropft. Man lässt 5 Stunden bei Zimmertemperatur stehen und erwärmt noch auf 60 C. Beim Eindampfen erhält man ein Rohprodukt, das aus Äthanol umkristallisiert wird.
Schmelzpunkt: 217 C. Beispiel <I>5</I> 2-[(4,5,5-Trimethyl-1,3-oxazolidinyliden- (2))-amino]-5-nitrothiazol-hydrochlorid 1,2 g 2-[(4,5,5-Trimethyl-1,3-oxazolidinyliden-(2))-amino]- 5-nitro-thiazol werden in 60 ml Methylenchlorid gelöst. Unter Eiskühlung und Rühren wird ein Überschuss an trockenem Chlorwasserstoff in die Lösung eingeleitet. Die Lösung wird bei 20 C im Vakuum eingeengt und die ausgefallenen Kristalle abgesaugt.
Das Rohprodukt wird mit warmem Methylenchlorid gewaschen.
Schmelzpunkt: 135 C (Zersetzung).
Die Verbindung der Formel 1 lässt sich zur pharmazeuti schen Anwendung gegebenenfalls in Kombination mit anderen antibakteriell, antiprotozootisch und/oder anthehnintisch wirkenden Verbindungen in die üblichen pharmazeutischen Präparate einarbeiten. Die Einzeldosis beträgt für Erwachsene 20-400 mg, vorzugsweise 50-250 mg.
Process for the preparation of 2 - [(4,5,5-trimethyl-1,3-oxazolidinylidene- (2)) amino] -5-nitrothiazo1 The invention relates to a process for the preparation of the new 2 - [(4,5,5 -Trimethyl-1,3-oxazolidinylidene- (2)) amino] -5-nitrothiazoles of the formula 1
EMI0001.0002
as well as its physiologically acceptable acid addition salts with inorganic or organic acids.
According to the invention, the new compound can be prepared by the following process: Reaction of substituted 2-methylenamino-5-nitrothiazoles of the formula 2 -S-R3
EMI0001.0003
in which the radicals R1 and R2, which can be identical or different, halogen atoms or radicals of the formula -S-R3 mean, in which R3 represents an alkyl, aralkyl or alkenyl group, the radicals R1 and R2 also together being one Bismer-captoalkylengruppe with an alkylene radical with 1,2 or 3 carbon atoms can be, with 2-amino-3-methyl-butanol- (3), optionally in the presence of a heavy metal oxide which forms sparingly soluble complexes with mercaptans, for example in the presence of Lead oxide (Pb0).
The reaction takes place at room temperature or elevated temperatures, conveniently in the presence of a solvent, but it can also be carried out without a solvent. For example, water-containing or water-free aliphatic alcohols or ketones are suitable as solvents. Compounds of the formula 2 in which one of the radicals or the two radicals R1 and R2 represent halogen atoms are preferably reacted in anhydrous ethers, for example in dioxane. The required temperature depends on the reactivity of the radicals R1 and R2 and is preferably between 0 and 100 C.
The addition of heavy metal oxides, for example lead oxide, is particularly advantageous when the radicals R1 and / or R2 in the compounds of formula 2 to be reacted are radicals of low-volatility mercaptans.
The 2 - [(4,5,5-trimethyl-2-oxazolidinylidene) amino] -5-nitrothiazole can be converted into its acid addition salts with inorganic or organic acids in a manner known per se. Examples of acids are hydrochloric acid, hydrobromic acid, sulfuric acid or acetic acid.
The compounds of formula 2 used as starting materials, in which the radicals R1 and R2 are substituted mercapto groups, can be prepared, for example, in the following manner: With carbon disulfide in the presence of a base, 2-amino-5-nitro-thiazole is converted into one polar solvent, the corresponding salt of 2- (bismercapto-methylenamino) -5- nitrothiazole is prepared, which is then converted into a compound of formula 2, optionally in stages, for example with alkyl, aralkyl or alkenyl halides. The production of this starting substance is also described in the German Federal Patent ........
(German patent application P 16 95 911.8).
Compounds of formula 2 in which one of the radicals R4 or R5 represents a halogen atom can be prepared from 2 - [(bisalkyl mercaptomethylene) amino] -5-nitro-thiazoles by the action of a halogen with heating in the presence of a halogenated solvent, such as carbon tetrachloride obtained. After the reaction has ended, the solvent is removed and the mostly oily residue is crystallized using ether, preferably before.
If the second radical R1 or R = in the compound of formula 2 thus obtained is also to be replaced by a halogen atom, this is done under the action of a stronger halogenating agent, for example a phosphorus pentahalide, at elevated temperatures (cf. also German Federal Patent .... [German patent application P 16 95 910.7]).
The 2-amino-3-methyl-butanol- (3) is known from the literature and can be according to W. Pfleiderer and H. Zondler, Chem. Ber. 99, page 3014 (1966).
The new compound has valuable pharmacological properties. It has an antimicrobial effect and is particularly effective against trichomonads.
The antitrichomonad activity was tested on male NMRI mice which had previously been infected with Trichomonas fetus. A thioglycolate broth with 10% horse serum and an added antibiotic (500 I.U. penicillin / ml and 0.2 mg streptomycin / ml) with a pH of 7.0 served as the nutrient medium for Trichomonas fetus. The incubation time of Trichomonas fetus in this nutrient medium was 24 hours at 37 C.
From this solution, which was diluted in such a way that approx. 8 to 10 germs could be seen in the field of view of the microscope at 320x magnification, 0.5 ml were given i.p. applied to groups of 6 mice each. The infected animals received 50 mg / kg of active substance twice a day for 3 days, for the first time 2 hours after infection, orally. The number of surviving animals was determined after an observation period of 28 days. Untreated control animals died after 4-5 days. It was found that at a dose of 50 mg / kg with oral application, 6 out of 6 animals survived after 28 days.
The acute toxicity was determined in groups of 10 male NMRI mice per dose. The mice had an average body weight of 18-20 g. It was found that the active substance is non-toxic; its LD50 is above 4 g / kg when administered orally.
The following examples are intended to explain the invention in more detail: Example <I> 1 </I> 24.9 g (0.1 mol) 2- (Bismethyhmercapto-methylenamino) -5-nitrothiazole are dissolved in 700 ml hot n-butanol and 10.3 g (0.1 mol) of 2-amino-3-methyl-butanol- (3) were added. The mixture is refluxed for 4 hours. After cooling, the crystals are filtered off with suction and recrystallized from ethanol.
Melting point: 218 ° C. Yield: 17 g (62% of theory). Example <I> 2 </I> 9.9 g (0.04 mol) 2- (5-nitro-2-thiazolylimino) -1,3-dithiacyclopentane and 13.5 g (0.06 mol) lead oxide (PbO) are slurried in 500 ml of ethanol, 4 g (0.04 mol) of 2-amino-3-methyl-butanol- (3) are added and the mixture is refluxed for 3 hours with stirring. The batch is sucked off while still hot from the resulting lead salt of 1,2-ethylene dithiol and the filtrate is evaporated in vacuo. The crude product is recrystallized several times from ethanol.
Melting point: 218 ° C. Yield: 4.1 g (40% of theory). Example <I> 3 </I> 6.15 g (0.03 mol) of 2 - [(chloromethylmercaptomethylene) amino] -5-nitrothiazole are dissolved in 30 ml of anhydrous dioxane and, with ice cooling, 3 g (0 , 03 mol) of 2-amino-3-methyl-butanol- (3) were added dropwise. It is allowed to come to room temperature and stand for another 5 hours. Finally, the solution is heated on the water bath for another 1/2 hour. After evaporation, a dark brown smear is obtained, which partially crystallizes when rubbed with ethyl acetate. The Rohpro product is recrystallized from ethanol.
Melting point: 217 C. Example <I> 4 </I> 2 - [(dichloromethylene) -amino] -5-nitrothiazole is dissolved in an inert solvent, for example dioxane, and the calculated amount of 2-amino-3- with ice-cooling methyl-butanol- (3), dissolved in dioxane, was added dropwise. The mixture is left to stand for 5 hours at room temperature and then warmed to 60 ° C. Evaporation gives a crude product which is recrystallized from ethanol.
Melting point: 217 C. Example <I> 5 </I> 2 - [(4,5,5-Trimethyl-1,3-oxazolidinylidene- (2)) -amino] -5-nitrothiazole hydrochloride 1.2 g 2 - [(4,5,5-Trimethyl-1,3-oxazolidinylidene- (2)) -amino] -5-nitro-thiazole are dissolved in 60 ml of methylene chloride. An excess of dry hydrogen chloride is passed into the solution while cooling with ice and stirring. The solution is concentrated in vacuo at 20 ° C. and the crystals which have precipitated out are filtered off with suction.
The crude product is washed with warm methylene chloride.
Melting point: 135 ° C (decomposition).
For pharmaceutical use, the compound of formula 1 can optionally be incorporated into the customary pharmaceutical preparations in combination with other antibacterial, antiprotozootic and / or anthropogenic compounds. The single dose for adults is 20-400 mg, preferably 50-250 mg.
Claims (1)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1056672A CH527848A (en) | 1969-04-09 | 1970-04-08 | Process for the preparation of 2 - ((4,5,5-trimethyl-1,3-oxazolidinylidene- (2)) amino) -5-nitrothiazole |
| CH1056572A CH527847A (en) | 1969-04-09 | 1970-04-08 | Antimicrobial substituted 2-amino-5-nitroth |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1692868A CH513196A (en) | 1967-11-10 | 1968-11-13 | Process for the preparation of new 2-amino-5-nitro-thiazoles substituted on the amino group |
| DE19691918071 DE1918071A1 (en) | 1969-04-09 | 1969-04-09 | 2 - [(4,5,5-Trimethyl-1,3-oxazolidinylidene- (2)) amino] -5-nitro-thiazole and process for its preparation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH527213A true CH527213A (en) | 1972-08-31 |
Family
ID=25718694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH519070A CH527213A (en) | 1968-11-13 | 1970-04-08 | Antimicrobial substituted 2-amino-5-nitroth |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH527213A (en) |
-
1970
- 1970-04-08 CH CH519070A patent/CH527213A/en unknown
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| PLZ | Patent of addition ceased |