反应详情

As described for example 249d, 5-methyl-3-p-tolyl-isoxazole-4-carboxylic acid ethyl ester (12.6 g, 51.4 mmol) was converted, instead of 5-methyl-3-m-tolyl-isoxazole-4-carboxylic acid ethyl ester, to the title compound (3.95 g, 38%) which was obtained as a white solid. MS: m/e=204.2 [M+H]+.