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.
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
decarboxylative addition/aryl migration/desulfonylation of N-phenyl-N-(phenylsulfonyl)methacrylamide with primary, secondary, and tertiary carboxylicacids was described. The protocol provides an efficient approach for the synthesis of α-all-carbon quaternary stereocenters amides and isoquinolinediones. It was proposed that the radical generated from the silver-catalyzed decarboxylation was involved in the sequence