Iron-catalyzed arylmethylation of sulfonyl acrylamides
作者:Jin-Tao Yu、Weiming Hu、Haibo Peng、Jiang Cheng
DOI:10.1016/j.tetlet.2016.07.105
日期:2016.9
A novel iron-catalyzed arylmethylation of activated alkenes was developed using di-tert-butyl peroxide (DTBP) as the methyl radical source. This cascade process involved the sequential methyl radical addition, 1,4-aryl migration, and desulfonylation of sulfonyl acrylamides to afford a variety of α-aryl-β-methyl amides in good to moderate yields.
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
Intermolecular cascade annulations of N-(arylsulfonyl)acrylamides with dual C(sp<sup>3</sup>)–H bonds: divergent access to indanes and pyrrolidin-2-ones
作者:Ming Hu、Ling-Yu Guo、Ying Han、Fang-Lin Tan、Ren-Jie Song、Jin-Heng Li
DOI:10.1039/c7cc02608k
日期:——
intermolecular cascade annulation reaction of N-(arysulfonyl)acrylamides with dual alkyl C(sp3)-H bonds for producing two types of five-membered rings, indanes and pyrrolidin-2-ones, are described. By using cycloalkanes and common alkanes as a one-carbon unit, an intermolecular [4+1] cascade carboannulation of N-(arysulfonyl)acrylamides was achieved via a sequence of three C-H bond functionalization/aryl
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