Critical assessment of two classical synthetic methods for preparation of thiophene-substituted isoxazoles
作者:Gheorghe Roman
DOI:10.1007/s11164-013-1101-8
日期:2014.5
isolated from the reaction as the major product. Substitution of the β-bromine atom from a chalcone dibromides with a methoxy group by solvolysis occurred when no base was used. Mixtures of isomeric isoxazoles in which the isoxazole that had a 2-thienyl group at position 5 were always major components, were obtained in good yields from reaction of thiophene-containing 1,3-diketones with hydroxylamine hydrochloride