A C(sp3)–H peroxidation of 3-substitutedindolin-2-ones through radical coupling reaction has been developed under metal-free conditions. Using tert-butyl hydroperoxide both as an oxidant and as a peroxidation reagent to couple with the C(sp3)–H bonds of 3-substitutedindolin-2-ones can form a new C–O bond without using any additives. This simple strategy provides a green and efficient approach to
Bifunctional tertiary amine-squaramide catalyzed asymmetric catalytic 1,6-conjugate addition/aromatization of para-quinone methides with oxindoles
作者:Yu-Hua Deng、Xiang-Zhi Zhang、Ke-Yin Yu、Xu Yan、Ji-Yuan Du、Hanmin Huang、Chun-An Fan
DOI:10.1039/c5cc10502a
日期:——
Asymmetric catalytic 1,6-addition of p-QMs with racemic oxindoles under the bifunctionalcatalysis of C2-symmetric dimeric Cinchona-derived squaramides is described. This tertiary amine-squaramide catalzyed reaction provides a diastereoselective and enantioselective approach...