Abstract
A highly enantioselective vinylogous Michael addition reaction of 3-alkylidene oxindoles to α-substituted β-nitroacrylates has been developed by using a cinchona alkaloid-squaramide bifunctional organocatalyst, which provides a series of chiral products bearing all-carbon quaternary stereocenters in excellent yields with high enantioselectives (up to 97%).
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