Palladium-Catalyzed Alkylarylation of Acrylamides with Unactivated Alkyl Halides
作者:Hua Wang、Li−Na Guo、Xin-Hua Duan
DOI:10.1021/acs.joc.5b02433
日期:2016.2.5
An efficient palladium-catalyzed alkylarylation of acrylamides with unactivatedalkyl halides has been developed. This method is highlighted by its broad substrate scope and excellent functional group tolerance. In addition to alkyl halides, fluoroalkyl halides and benzyl bromides also participated well in this transformation. A detailed mechanistic investigation suggests that a radical pathway is
Copper-catalyzed alkylarylation of activated alkenes using isocyanides as the alkyl source: an efficient radical access to 3,3-dialkylated oxindoles
作者:Yaping Zhao、Zhenghua Li、Upendra K. Sharma、Nandini Sharma、Gonghua Song、Erik V. Van der Eycken
DOI:10.1039/c6cc02024k
日期:——
A novel and efficient protocol for the synthesis of 3,3-dialkylated oxindoles is described. The method involves a copper-catalyzed tandem radical addition/cyclization of N-arylacrylamides with the alkyl radicals generated from isocyanides....
Metal-free cascade oxidative decarbonylative alkylarylation of acrylamides with aliphatic aldehydes: a convenient approach to oxindoles via dual C(sp<sup>2</sup>)–H bond functionalization
作者:Luo Yang、Wen Lu、Wang Zhou、Feng Zhang
DOI:10.1039/c6gc00362a
日期:——
A convenient metal-free cascade oxidative decarbonylative alkylarylation of acrylamides with aliphaticaldehydes to provide quaternary oxindoles is developed.
catalysis is an efficient process for the alkylation of diverse organic compounds via the generation of alkyl radicals from alkyl bromides and iodides. However, the generation of alkyl radicals from more stable alkyl chlorides remains challenging. Herein, we demonstrate the excited-state palladium-catalyzed synthesis of oxindoles and isoquinolinediones via alkylation/annulation reaction by overcoming
N-(Acyloxy)phthalimides as tertiary alkyl radical precursors in the visible light photocatalyzed tandem radical cyclization of N-arylacrylamides to 3,3-dialkyl substituted oxindoles
light promoted tandem radical cyclization of N-arylacrylamides with N-(acyloxy)phthalimides to 3,3-dialkyl substituted oxindoles was developed. In the presence of a photocatalyst Ru(bpy)3Cl2·6H2O, an organic base i-Pr2NEt and the irradiation of a 25 W compact fluorescence bulb at room temperature, N-(acyloxy)phthalimides may be used as a masking group for tertiary alkyl radicals. This tandem radical