Covalent hydration in the tetrazolo [1,5-c]quinazoline series (structure of the products of hydration of 5-methyl(phenyl)-9-bromotetrazolo[1,5-c]-quinazolines)

Abstract

1(2)-Methyl-5-(2-acylamino-5-bromophenyl)tetrazoles (VIa,b), the structures of which were proved by alternative synthesis, were obtained by the action of diazomethane on the products of covalent hydration of 5-methyl(phenyl)-9-bromotetrazolo[1,5-c]quinazolines. A comparison of the IR and UV spectra of the hydration products and VIa and VIb confirms that the former have the 5-(2-acylamino-5-bromophenyl)tetrazole structure (IIa,b) in the crystalline state and in solution.