Visible‐light mediates a radical three‐component reaction for the synthesis of sulfonylatedoxindoles with sulfurdioxide as key building block.
可见光介导了自由基的三组分反应,以二氧化硫为主要组成部分来合成磺酰化的吲哚。
Hydrogen and Sulfonyl Radical Generation for the Hydrogenation and Arylsulfonylation of Alkenes Driven by Photochemical Activity of Hydrogen Bond Donor‐Acceptor Complexes
作者:Yang Li、Fang Ma、Pinhua Li、Tao Miao、Lei Wang
DOI:10.1002/adsc.201801521
日期:2019.4
developed. The reaction afforded a range of hydrogenated products and sulfonated oxindoles in high yields under external photocatalyst‐free, oxidant‐ and reductant‐free conditions. Mechanistic investigations suggested this transformation is driven by the photochemical activity of hydrogen bond donor‐acceptor complex, generated from the substrates of arylsulfinic acids and C6‐(vinyl sulfone)phenanthridines
Catalyst-free direct arylsulfonylation of N-arylacrylamides with sulfinic acids: a convenient and efficient route to sulfonated oxindoles
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Juan Du、Jinmao You、Hua Wang
DOI:10.1039/c4gc00231h
日期:——
A catalyst-free procedure has been developed for the construction of sulfonated oxindoles via direct arylsulfonylation of activated alkenes with sulfinic acids.
已开发出一种无催化剂的程序,用于通过活化烯烃与亚磺酸直接芳基磺酰化的方法构建磺酸化的噁烯酮。
Visible-Light Photoredox Catalysis: Direct Synthesis of Sulfonated Oxindoles from<i>N</i>-Arylacrylamides and Arylsulfinic Acids by Means of a Cascade C−S/C−C Formation Process
作者:Dong Xia、Tao Miao、Pinhua Li、Lei Wang
DOI:10.1002/asia.201500498
日期:2015.9
A novel photocatalytic synthesis of sulfonated oxindoles from N‐arylacrylamides and arylsulfinic acids was developed by means of a cascade C−S/C−C bond‐formation process. This method provides mild, efficient, and atom‐economical access to various sulfonated oxindoles in water.
visible-light-driven cascade cyclization reaction to synthesize 3-methyl-3-acetophenone-2-oxindoles and 3-methyl-3-(methylsulfonyl)benzene-2-oxindoles in yields up to 96% and 99%, via benzoyl and phenylsulfinyl radicals with acrylamide derivatives is reported, respectively. Extensive studies, including gram-scale, radical capture and isotope experiments, were performed to indicate that the reaction may involve a radical