反应详情

As described for example 67b, 5-methyl-3-pyridin-2-yl-isoxazole-4-carboxylic acid ethyl ester (25 g, 108 mmol) was converted, instead of 5-methyl-3-pyridin-4-yl-isoxazole-4-carboxylic acid ethyl ester, to the title compound (19.8 g, 97%) which was obtained as a light yellow solid. MS: m/e=191.3 [M+H]+.