Palladium-Catalyzed Cyclization/Carboalkoxylation of Alkenyl Indoles
作者:Cong Liu、Ross A. Widenhoefer
DOI:10.1021/ja046810i
日期:2004.8.1
room temperature for 30 min led to cyclization/carboalkoxylation to form the corresponding tetrahydrocarbazole in 83% isolated yield as a single regioisomer. Palladium-catalyzed cyclization/carboalkoxylation of 2-(4-pentenyl)indoles tolerated substitution along the alkenyl chain and at the internal and cis-terminal olefinic positions. Palladium-catalyzed cyclization/carboalkoxylation tolerated a range
Scope and Mechanism of the PdII-Catalyzed Arylation/Carboalkoxylation of Unactivated Olefins with Indoles
作者:Cong Liu、Ross A. Widenhoefer
DOI:10.1002/chem.200500787
日期:2006.3.1
Stereochemical analyses of the palladium-catalyzed cyclization/carboalkoxylation of both 2- and 3-alkenyl indoles are in agreement with mechanisms involving outer-sphere attack of the indole on a palladium-olefin complex followed by alpha-migratory insertion of CO and methanolysis of the resulting acyl palladiumintermediate. CuCl2 functions as the terminal oxidant in this palladium-catalyzed cyclization/carboalkoxylation