The Development of Efficient Protocols for the Palladium-Catalyzed Cyclization Reactions of Secondary Amides and Carbamates
作者:Bryant H. Yang、Stephen L. Buchwald
DOI:10.1021/ol9905351
日期:1999.7.1
[formula: see text] With the proper choice of palladium catalyst, ligand, and base, five-, six-, and seven-membered rings are formed efficiently from secondary amide or secondary carbamate precursors, offering significant improvements to currently existing methodology.
Delineating ligand effects in intramolecular aryl amidation reactions: formation of a novel spiro-heterocycle by a tandem cyclisation process
作者:Emma L. Cropper、Aui-Ping Yuen、Agnes Ford、Andrew J.P. White、King Kuok (Mimi) Hii
DOI:10.1016/j.tet.2008.10.098
日期:2009.1
Ligand effects for intramolecular Pd-catalysed aryl amidation reaction were examined for the synthesis of seven-membered benzolactam rings. In an attempt to produce an eight-membered ring, tandem C-N/C-O bond forming reactions occurred to give a novel spiro-benzofuran-lactam structure. (C) 2008 Elsevier Ltd. All rights reserved.