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 metal-free decarbonylative arylalkylation of N-(arylsulfonyl)acrylamides with aliphatic aldehydes as alkylating source was developed, providing a series of α-aryl-β-alkylamides in moderate to good yields. In this reaction, the concomitant alkylation, aryl migration and desulfonylation was involved.
Metal-free catalytic activation of inert C(sp3)–H/elimination of SO2/C–C bond formationviaa free radical process were achieved in sequence.
无金属催化激活惰性C(sp3)-H/ SO2消除/ C-C键形成通过自由基过程实现了顺序。
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
Molecular Oxygen Mediated Radical Dicarbofunctionalization of Olefin with Aldehyde
作者:Promita Biswas、Joyram Guin
DOI:10.1021/acs.joc.8b00618
日期:2018.5.18
quaternary stereogenic center at the α-position via a one-pot alkylation/aryl-migration/desulfonylation radical cascade. The novel process is developed employing readily available and inexpensive aldehyde as an alkyl radical precursor and O2 as the sole oxidant. The method features a broad substrate scope, operational simplicity, convenient reagents, and scalability. A radical chain mechanism that