Copper-catalyzed enantioselective conjugate addition of grignard reagents to methyl 4,4,4-trifluorocrotonate : synthesis of enantioenriched trifluoromethylated compounds

Abstract

Copper-catalyzed enantioselective 1,4-conjugate addition of methyl 4,4,4-trifluorocrotonate with aliphatic Grignard reagents to access an asymmetric tertiary carbon center attached with a trifluoromethyl group was achieved under mild reaction conditions. The desired products could be obtained in reasonable yields and good enantioselectivities.