Metal-Free Synthesis of Oxazolidine-2,4-diones and 3,3-Disubstituted Oxindoles via ICl-Induced Cyclization
作者:Wei Yi、Xing-Xiao Fang、Qing-Yun Liu、Gong-Qing Liu
DOI:10.1002/ejoc.201801250
日期:2018.12.19
A metal‐free method for the construction of oxazolidine‐2,4‐diones and oxindoles is reported herein. The resulting products can be used as key intermediates in synthesis of bioactive compounds such as toloxatone, (±)‐esermethole, and (±)‐physostigmine.
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.
Silver-Catalyzed Carboazidation of Arylacrylamides
作者:Xiao-Hong Wei、Ya-Min Li、An-Xi Zhou、Ting-Ting Yang、Shang-Dong Yang
DOI:10.1021/ol402138y
日期:2013.8.16
inexpensive method of nontoxic, silver-salt-catalyzed carboazidation of arylacrylamides to afford corresponding azide oxindoles is reported. This reaction system exhibits great functional group tolerance. All products form a crucial skeleton for the synthesis of various indole alkaloids.
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.