Unexpected synthesis of three components from the reaction of 4-chloro-3-formylcoumarin with hydroxylamine hydrochloride

Abstract

A mild and simple oximation reaction of 4-chloro-3-formylcoumarin with hydroxylamine hydrochloride in basic medium gave unexpected three components via oxime.Those compounds were separatedin good yields by preparative TLC and by chemical means using differentreaction conditions. IR, 1H NMR, 13C NMR and mass spectral data confrmed the structure of the separated compounds.