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US4082764A Methods for the production of 4H-s-triazolo[4,3-a][1,4]benzodiazepine 5N-oxides 失效
生产4H-S-三唑(4,3-A)+8,1,4)苯并咪唑5N-氧化物的方法

Methods for the production of 4H-s-triazolo[4,3-a][1,4]benzodiazepine
5N-oxides
摘要:
The title compounds are prepared by reacting a 3-amino-3,4-dihydro-4-hydroxy-4-phenylquinazoline with a reactive derivative of a halogenoacetic acid, reacting the resultant halogenoacetyl derivative with a weak acid, reacting the resultant 2-(3-halomethyl-s-triazol-4-yl)benzophenone with hydroxylamine and subjecting the resultant 2-(3-hydroxyamino-methyl-s-triazol-4-yl)benzophenone to dehydration to effect ring closure.
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