Ring Transformation of Chromone-3-Carboxamide under Nucleophilic Conditions
作者:Magdy A. Ibrahim
DOI:10.5935/0103-5053.20130220
日期:——
The chemical reactivity of chromone-3-carboxamide was studied towards a series of nitrogen and carbon nucleophiles. Treatment of carboxamide with some primary amines gave chromane-2,4-diones. Condensation of carboxamide with hydrazine hydrate, phenyl hydrazine and hydroxylamine hydrochloride afforded chromenopyrazoles and chromenoisoxazole, respectively. Reaction of carboxamide with guanidine hydrochloride