Free-Radical Cascade Alkylarylation of Alkenes with Simple Alkanes: Highly Efficient Access to Oxindoles via Selective (sp<sup>3</sup>)C–H and (sp<sup>2</sup>)C–H Bond Functionalization
作者:Zejiang Li、Ye Zhang、Lizhi Zhang、Zhong-Quan Liu
DOI:10.1021/ol4032478
日期:2014.1.17
A copper-catalyzed alkylarylation of alkenes with simple alkanes was achieved, which not only provided an efficient method to prepare various alkyl-substituted oxindoles, but also represented a novel strategy for selective sp3 C–H functionalization/C–C bond formation via a free-radical cascade process. Additionally, selective activation of unactivated (sp3)C–H and (sp2)C–H bonds by one single step
Transition-metal-free alkylation strategy: facile access to alkylated oxindoles <i>via</i> alkyl transfer
作者:Wen-Qin Yu、Jian-Hong Fan、Pu Chen、Bi-Quan Xiong、Jun Xie、Ke-Wen Tang、Yu Liu
DOI:10.1039/d2ob00019a
日期:——
The transition-metal-free alkylation/cyclization of activated alkenes using Hantzschesterderivatives as effective alkyl reagents is described. A wide variety of valuable oxindoles was constructed in a single step with excellent selectivity. The reaction occurs through the formation of alkyl radical species followed by the tandem addition/annulation of olefins under oxidative conditions. This protocol