反应详情

The procedure of Preparation Example 1 (6) was repeated using 2,2-bisfluoromethyl-6-iodo-2H-1-benzopyran-4-carboxylic acid ethyl ester, potassium pentafluoropropionate, cuprous iodide, toluene and N,N-dimethylformamide to give 6-pentafluoroethyl-2,2-bisfluoromethyl-2H-1-benzopyran-4-carboxylic acid ethyl ester as an oil;