反应详情

In analogy to the procedure described for example 13 a], 5-(4-trifluoromethoxy-phenyl)-1H-pyrazole-3-carboxylic acid ethyl ester (example 11 b]) was reacted with trifluoroethyltriflate to give 2-(2,2,2-trifluoro-ethyl)-5-(4-trifluoromethoxy-phenyl)-2H-pyrazole-3-carboxylic acid ethyl ester as colorless solid.