The kinetic resolution of a carbon nucleophile is realized for the first time via Pd-catalyzed asymmetricallylicalkylation with "unstabilized" ketone enolates as the nucleophile, providing both allylated 2,3-disubstituted 2,3-dihydro-4-quinolones and recovered substrates in high yields and high ee (S-factor is 40-145). The application of the methodology in organic synthesis is demonstrated by the
Enantioselective Synthesis of 2-Aryl-2,3-dihydro-4-quinolones by Chiral Brønsted Acid Catalyzed Intramolecular Aza-Michael Addition Reaction
作者:Shu-Li You、Zhen Feng、Qing-Long Xu、Li-Xin Dai
DOI:10.3987/com-09-s(s)66
日期:——
Asymmetric intramolecular aza-Michael addition of activated α,β-unsaturated ketones catalyzed by chiral N-triflyl phosphoramide was realized. Enantioenriched 2-aryl-2,3-dihydroquinolin-4-ones can be obtained in excellent yields (77-98%) with up to 82% ee.