Iron-catalyzed aerobic difunctionalization of alkenes: a highly efficient approach to construct oxindoles by C–S and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Song Song、Ning Jiao
DOI:10.1039/c4cc00401a
日期:——
A novel iron-catalyzed efficient approach to construct sulfone-containing oxindoles, which play important roles in the structural library design and drug discovery, has been developed. The use of readily available benzenesulfinic acids, an inexpensive iron salt as the catalyst, and air as the oxidant makes this sulfur incorporation protocol very efficient and practical.
Metal-free nitro-carbocyclization of activated alkenes: a direct approach to synthesize oxindoles by cascade C–N and C–C bond formation
作者:Tao Shen、Yizhi Yuan、Ning Jiao
DOI:10.1039/c3cc47336h
日期:——
A novel and direct metal-free nitro-carbocyclization of activatedalkenes leading to valuable nitro-containing oxindoles via cascade C-N and C-C bond formation has been developed. The mechanistic study indicates that the initial NO and NO2 radical addition and the following C-H functionalization processes are involved in this transformation.
Nickel-Catalyzed Transformation of Diazoacetates to Alkyl Radicals Using Alcohol as a Hydrogen Source
作者:Jingjing Zhao、Pan Li、Yaohua Xu、Yixin Shi、Fuwei Li
DOI:10.1021/acs.orglett.9b03610
日期:2019.12.6
transformation of diazoacetates to α-carbonyl methylene radicals has been disclosed in the presence of hyperoxide using ethanol as a hydrogen source and solvent. This strategy is successfully applied in the formation of indolin-2-ones or 1,4-dicarbonyl compounds from acrylamides or enamides in moderate to good yields. These reactions undergo radical addition onto C-C double bonds followed by a cyclization/oxidation
Palladium-Catalyzed Oxidative Arylalkylation of Activated Alkenes: Dual CH Bond Cleavage of an Arene and Acetonitrile
作者:Tao Wu、Xin Mu、Guosheng Liu
DOI:10.1002/anie.201104575
日期:2011.12.23
but two: The title reaction proceeds through the dual CHbondcleavage of both aniline and acetonitrile (see scheme). The reaction affords a variety of cyano‐bearing indolinones in excellent yield. Mechanistic studies demonstrate that this reaction involves a fast arylation of the olefin and a rate‐determining CH activation of the acetonitrile.
Ag-Promoted Azido-Carbocyclization of Activated Alkenes via CH Bond Cleavage
作者:Yizhi Yuan、Tao Shen、Kui Wang、Ning Jiao
DOI:10.1002/asia.201300960
日期:2013.12
silver‐promoted azido‐carbocyclization of activatedalkenesvia a radical pathway has been developed. Azido oxindoles, which hold great potential for subsequent transformation of the azido unit, are efficiently constructed by this protocol. Radical addition and CH functionalization processes are involved in this transformation with the formation of CN and CC bonds. Silver is observed to promote the