Room Temperature Asymmetric Allylic Trifluoromethylation of Morita-Baylis-Hillman Carbonates

(DHQD)(2)PHAL-catalyzed asymmetric allylic trifluoromethylation of Morita-Baylis-Hillman adducts using a Rupert-Prakash reagent is reported. This transformation provided the S(N)2' trifluoromethylated products with good yields and excellent enantioselectivities at room temperature. It was also found that the reaction could be accelerated using acetonitrile as cosolvent.