A catalytic system consisting of KI, 18-crown-6, and TBHP for arylsulfonylation of activated alkenes with sulfonylhydrazides as sulfonyl precursor is described. This protocol provides a practical and environmentally benign method for the construction of sulfonated oxindoles in water.
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.