A copper-catalyzed radical cross-coupling of oxime esters and activatedalkenes is accomplished for the synthesis of cyanoalkylsulfonylated oxindoles and cyanoalkyl amides via an aryl migration strategy. Specifically, the subsequent mechanism research indicates that the unique desulfonylation and sulfone addition processes were involved in the transformation. This transformation is identified as having
Metal-Free Oxidative 1,2-Arylmethylation Cascades of <i>N</i>-(Arylsulfonyl)acrylamides Using Peroxides as the Methyl Resource
作者:Fang-Lin Tan、Ren-Jie Song、Ming Hu、Jin-Heng Li
DOI:10.1021/acs.orglett.6b01419
日期:2016.7.1
1,2-arylmethylation cascades of N-(arylsulfonyl)acrylamides for the assembly of 2,2-disubstituted-N-arylbutanamides containing an all-carbonquaternarycenter is presented. This reaction enables the one-step formation of two new C–C bonds through a sequence of methylation/1,4-aryl migration/desulfonylation using an organic peroxide as the methyl resource with a broad substrate scope and excellent functional
Arylphosphonylation and Arylazidation of Activated Alkenes
作者:Wangqing Kong、Estíbaliz Merino、Cristina Nevado
DOI:10.1002/anie.201311241
日期:2014.5.12
Two radical‐mediated processes of activatedalkenes, namely arylphosphonylation and arylazidation, are described. The difunctionalization of alkenes by a tandem process that involves radical addition, 1,4‐aryl migration, and desulfonylation generates α‐aryl‐β‐heterofunctionalized amides bearing a quaternarystereocenter when the substituent on the nitrogen atom is an aryl group. Alternatively, heterooxindoles
Copper-catalyzed arylsulfonylation of N-arylsulfonyl-acrylamides with arylsulfonohydrazides: synthesis of sulfonated oxindoles
作者:Qingshan Tian、Ping He、Chunxiang Kuang
DOI:10.1039/c4ob01231c
日期:——
A copper-catalyzed arylsulfonylation of N-arylsulfonyl-acrylamides with sulfonylhydrazides through a tandem radical process was developed. This methodology provided an alternative strategy for the synthesis of sulfonated oxindoles by forming C–S, C–N and C–C bonds in a single operation.
Palladium-Catalyzed Oxidative Heck-Type Alkylation/Aryl Migration/Desulfonylation between Alkenes with α-Carbonyl Alkyl Bromides
作者:Jian-Hong Fan、Ji Yang、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/ol503660a
日期:2015.2.20
A new Pd(II)-catalyzed alkene oxidative difunctionalization initiated by Heck insertion has been developed for the selective synthesis of acyclic and cyclic all-carbon quaternary stereocenters, which achieves an oxidative Heck-type alkylation, aryl migration, and desulfonylation sequence and represents a different input from those previously used Heck coupling in synthesis is reported.