Methods for the production of 4H-s-triazolo[4,3-a][1,4]benzodiazepine 5N-oxides
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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(2008/06/13)
Heterocycles. VII. Novel and facile syntheses of s triazolo [4,3-a] [1,4] benzodiazepine derivatives