Summary of main observation and conclusion A metal-free reaction of nitrosoarenes,aryldiazonium tetrafluoroborates,and sulfur dioxide under mild conditions is developed,giving rise to sulfonamides in moderate to good ...Summary of main observation and conclusion A metal-free reaction of nitrosoarenes,aryldiazonium tetrafluoroborates,and sulfur dioxide under mild conditions is developed,giving rise to sulfonamides in moderate to good yields.This transformation proceeds eficiently at room temperature in the presence of cyclohexa-1,4-diene with a broad reaction scope.Good functional group compatibility is observed,including cyano,halo,and ester.A plausi-ble mechanism involving a radical process with the insertion of sulfur dioxide is proposed,and cyclohexa-1,4-diene serves as the reductant during the transformation.展开更多
基金Financial support from the National Natural Science Foundation of China(Nos.21871053,21532001 and 21762018)the Natural Science Foundation of Jiangxi Province(No.20192BCBL23009)。
文摘Summary of main observation and conclusion A metal-free reaction of nitrosoarenes,aryldiazonium tetrafluoroborates,and sulfur dioxide under mild conditions is developed,giving rise to sulfonamides in moderate to good yields.This transformation proceeds eficiently at room temperature in the presence of cyclohexa-1,4-diene with a broad reaction scope.Good functional group compatibility is observed,including cyano,halo,and ester.A plausi-ble mechanism involving a radical process with the insertion of sulfur dioxide is proposed,and cyclohexa-1,4-diene serves as the reductant during the transformation.
