Palladium-Catalyzed C−H Functionalization of N-Arylpropiolamides with Aryliodonium Salts: Selective Synthesis of 3-(1-Arylmethylene)oxindoles
摘要:
A selective and efficient method for the synthesis of 3-(1-arylmethylene)oxindoles by palladium-catalyzed C-H functionalization of anilides with aryliodonium salts has been developed. In the presence of Pd(OAc)(2) and Et3N, a variety of anilides underwent the reaction with aryliodonium salts to afford the corresponding 3-(1-arylmethylene)oxindoles in moderate to good yields. It is noteworthy that the reaction can be conducted providing moderate yields even without bases. The mechanism of the reaction was also discussed.
Visible-light promoted one-pot synthesis of sulfonated spiro[4,5]trienones from propiolamides, anilines and sulfur dioxide under transition metal-free conditions
A novel visible-light promoted sulfonylation/ipso-cyclization of N-arylpropiolamides with aromatic amines and DABCO·(SO2)2 to synthesize various sulfonated spiro[4,5]trienones is reported.
Palladium Nanoparticle-Catalyzed Stereoselective Domino Synthesis of All-Carbon Tetrasubstituted Olefin Containing Oxindoles via Carbopalladation/C–H Activation
作者:Naziya Parveen、Govindasamy Sekar
DOI:10.1021/acs.joc.0c00915
日期:2020.8.21
catalyzed single-step, stereoselective domino synthesis of symmetrically and unsymmetrically all-carbon tetrasubstituted olefin containing oxindoles from readily accessible anilides has been developed. The Pd-BNP catalyst showed a wide range of functional group tolerance that enabled building a library of heteroaromatics. This reusable Pd catalyst reflected its utility in the synthesis of biologically important
Palladium-catalyzed domino N-arylation/carbopalladation/C–H functionalization: three-component synthesis of 3-(diarylmethylene)oxindoles
作者:Artur Pinto、Luc Neuville、Jieping Zhu
DOI:10.1016/j.tetlet.2009.03.086
日期:2009.7
A palladium-catalyzedthree-component synthesis of 3-(diarylmethylene)indolin-2-ones has been developed. A sequence of intermolecular N-arylation/intermolecular carbopalladation/C–H activation/C–C bond formation was realized in a one-pot fashion allowing the construction of one C–N bond and two C–C bonds by way of three distinct catalytic cycles.
Radical-induced denitration of <i>N</i>-(<i>p</i>-nitrophenyl)propiolamides coupled with dearomatization: access to phosphonylated/trifluoromethylated azaspiro[4.5]-trienones
作者:Kangdong Mo、Xiaocong Zhou、Ju Wu、Yufen Zhao
DOI:10.1039/d1cc05724c
日期:——
Synthesis of azaspiro[4.5]trienones from electron-deficient heteroarenes coupled with a dearomative denitration process.