1426306-75-3Relevant articles and documents
Bifunctional tertiary amine-squaramide catalyzed asymmetric catalytic 1,6-conjugate addition/aromatization of para-quinone methides with oxindoles
Deng, Yu-Hua,Zhang, Xiang-Zhi,Yu, Ke-Yin,Yan, Xu,Du, Ji-Yuan,Huang, Hanmin,Fan, Chun-An
, p. 4183 - 4186 (2016)
The asymmetric catalytic 1,6-addition of p-QMs with racemic oxindoles under the bifunctional catalysis of C2-symmetric dimeric Cinchona-derived squaramide is described. This tertiary amine-squaramide catalyzed reaction provides a diastereoselective and enantioselective approach to the effective assembly of diverse diarylmethine-substituted oxindoles having vicinal tertiary and quaternary stereocenters.