3-[[3,5-Bis(trifluoromethyl)phenyl]amino]-4-[[(9R)-10,11-dihydro-6'-methoxycinchonan-9-yl]amino]-3-cyclobutene-1,2-dione, 98%, (99% ee)

Technical Notes:
1.Conjugate Addition: Conjugate addition reactions of a wide range of nucleophilic enol species with enones, catalyzed by a cinchona alkaloid derived thiourea orga nocatalyst, have been developed with attending good yields and high enantioselectivities under a mild reaction condition.
References:
1. J. Am. Chem. Soc., 2006, 128, 12652-1 2653.