Methods for the production of 4H-s-triazolo[4,3-a][1,4]benzodiazepine
申请人:Takeda Chemical Industries, Ltd.
公开号:US04082764A1
公开(公告)日:1978-04-04
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.