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.
Acid-catalyzed cascade radical addition/cyclization of arylacrylamides with ketones
作者:Xiao-Feng Xia、Su-Li Zhu、Minglu Zeng、Zhen Gu、Haijun Wang、Wei Li
DOI:10.1016/j.tet.2015.06.106
日期:2015.9
radical addition/cyclization of arylacrylamides with ketones was described. The reaction tolerates a series of functional groups, such as nitro, methoxyl, carbonyl, bromo, chloro, fluoro, and trifluoromethyl groups. γ-Peroxyketones were also prepared using N-arylsulfonyl-acrylamides as substrates under acid-catalyzed conditions.
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
A novel copper-catalyzedone-pottrifluoromethylation/arylmigration/desulfonylation and C(sp(2))-N bond formation with conjugated tosyl amides as starting materials is presented here. The reaction affords α-aryl-β-trifluoromethyl amides bearing a quaternary stereocenter or trifluoromethylated oxindoles in a regioselective manner.