Ma, Shengming; Negishi, Ei-Ichi, Journal of the American Chemical Society, 1995, vol. 117, # 23, p. 6345 - 6354
作者:Ma, Shengming、Negishi, Ei-Ichi
DOI:——
日期:——
Palladium-catalyzed carbonylative cyclization via trapping of acylpalladium derivatives with internal enolates. Its scope and factors affecting the C-to-O ratio
作者:El-ichi Negishi、Christophe Copéret、Takumichi Sugihara、Izumi Shimoyama、Yantao Zhang、Guangzhong Wu、James M. Tour
DOI:10.1016/s0040-4020(01)80765-1
日期:1994.1
The Pd-catalyzed carbonylative cyclization reaction involving omega-acyl-substituted acylpalladium derivatives can proceed via intramolecular trapping with either C- or O-enolates; the preferential formation of either 5- or 6-membered rings dictates the C-to-O ratio in the trapping with enolates.
Catalytic generation and trapping of acylmetals containing Ni and Cu with enolates
Carbonylative cyclization of iodoarenes and iodoalkenes containing a proximal enolate precursor can selectively provide either cyclic ketones or lactones in the presence of Ni or Cu catalysts via trapping of putative acylmetal derivatives with C-or O-enolates, respectively; the ring size and regioselectivity of the reaction may be predicted based on two generalizations derived from the recently developed corresponding Pd-catalyzed reaction. (C) 1998 Elsevier Science Ltd. All rights reserved.
Metal-promoted cyclization. 21. Palladium-catalyzed procedures for [3 + 2] annulation via intramolecular alkenylpalladation and arylpalladation