反应详情

As described for example 11a, 4-methyl-6-(5-methyl-3-phenyl-isoxazol-4-ylmethoxy)-pyridazine-3-carboxylic acid ethyl ester (2.30 g, 6.52 mmol), instead of 6-(5-methyl-3-phenyl-isoxazol-4-ylmethoxy)-pyridazine-3-carboxylic acid ethyl ester, was converted to the title compound (1.73 g, 82%) which was obtained as an off-white solid. MS: m/e=324.4 [M−H]−.