A Free Radical Cascade Silylarylation of Activated Alkenes: Highly Selective Activation of the Si–H/C–H Bonds
作者:Lizhi Zhang、Dong Liu、Zhong-Quan Liu
DOI:10.1021/acs.orglett.5b01067
日期:2015.5.15
The first example of silylarylation of activatedalkenes with silanes is reported via selective activation of the Si–H/C–H bonds, which allows efficient access to silylated oxindoles through a free-radical cascade process.
Visible-light-induced and iron-catalyzed methylation of N-arylacrylamides with dimethyl sulphoxide: a convenient access to 3-ethyl-3-methyl oxindoles
作者:Zuguang Xie、Pinhua Li、Yu Hu、Ning Xu、Lei Wang
DOI:10.1039/c7ob00779e
日期:——
A visible-light-induced and iron-catalyzed methylation of arylacrylamides by dimethyl sulphoxide (DMSO) is achieved, leading to 3-ethyl-3-methyl indolin-2-ones in high yields. This reaction tolerates a series of functional groups, such as methoxy, trifluoromethyl, cyano, nitro, acetyl and ethyloxy carbonyl groups. The visible-light promoted radical methylation and arylation of the alkenyl group are
Iron-Catalyzed Radical Methylation of Activated Alkenes with tert-Butanol as the Methyl Source
作者:Zhengbao Xu、Rui Jia、Zhiwei Ma、Shouhao Cao、Liang Shen、Hongfang Ji
DOI:10.1055/s-0039-1690193
日期:2019.10
A free-radical-initiated methylation/addition/cyclization of N-arylacrylamides and a methylation/addition/elimination of quinines have been developed in which t-BuOH is used as a methylsource. These reactions provide effective and selective methods for the synthesis of various methylated oxindoles and quinones in moderate to good yields.
A free radical‐initiated methylation and/or α‐chloro‐β‐methylation of N‐arylacrylamides with dimethyl sulfoxide under the analogous Fenton reaction condition has been developed, which provides an effective and facile cascade strategy for the synthesis of oxindoles and chlorinated amides.