反应详情

In the same manner as in Reference Example 64 and using ethyl 2-(2-methylphenyl)-3-oxo-2,3-dihydro-1H-pyrazole-4-carboxylate (3.1 g, 12 mmol) and methyl trifluoromethanesulfonate (2.5 mL) as starting materials, the title compound (2.1 g, 66%) was obtained as a pale-yellow solid.