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In vivo evaluation of substituted 3-amino-1,4-benzodiazepines as anti-depressant, anxiolytic and anti-nociceptive agents
Oxazepam (CAS 604-75-1) 4 a served as building block in the synthesis of substituted 3-amino-l,4-benzodiazepines, which were subsequently tested in various CNS animal models. The hydroxy group of oxazepam was either activated as a chloride (Method A) or as a phos- phor-oxy derivative (Method B) giving the desired 3-amino-l,4-benzodiapines 6 a- 6r in high yields with primary and secondary amines in a typical nucleophilic substitution reaction. Eighteen 3-substi- tuted 1,4-benzodiazepines were prepared and served as new chemical entities and for lead structure discovery. The mixed cholecystokinin (CCK) antagonist 6 e showed anxiolytic and antidepressant effects from 10mug/kg in mice in the elevated x-maze test and the forced swimming test. The CCK 1 antagonist 6 g has shown antidepressant effects from the same dose, but lacked anxiolytic properties. Both compounds potentiated at a dose of 0.5 mg/kg morphine antinocicep- tion with a maximum possible effect (MPE) about 35 %. By assessing initially the MPE of antinocipection for the 18 newly synthesised benzodiazepines in the tail-flick test, 4 other benzodiazepines were found active. In further in vivo evaluation the cyclohexyl derivative 6 i displayed anxiolytic, antidepressant and antinociceptive properties as single agent at a dose of 5 mg/kg without toxicity. The benzodiazepines 6i and 6p, which initially showed a higher MPE in terms of morphine potentiation (43/44%) showed analgesic effects as single agents, without having anxiolytic or antidepressant properties. The amino-piperidinyl derivative 6 p displayed a similar dose-response relationship to morphine, but was 3 times more potent. ECV Editio Cantor Verlag, Aulendorf (Germany).
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Recommanded Product: 4-Amino-1-benzylpiperidine, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 50541-93-0, in my other articles.
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Piperidine – Wikipedia,
Piperidine | C5H12462N – PubChem