Facile 5-endo electrophilic cyclization of unsaturated amides with tBuOCl/I2
摘要:
5-Endo iodocyclization of various beta,gamma-unsaturated amides proceeded smoothly to give the corresponding conjugated imino-lactones exclusively in satisfactory yields with the use of (BuOCl)-Bu-1 and I-2 as the reagents, which proved to be much advantageous over the conventional I-2/NaHCO3. (c) 2006 Elsevier Ltd. All rights reserved.
Carbonylation reactions constitute important methodologies for the synthesis of all kinds of carboxylic acid derivatives. The development of novel and efficient catalysts for these transformations is of interest for both academic and industrial research. Here, the first palladium-based catalyst system for the aminocarbonylation of 1,3-dienes is described. This atom-efficient transformation proceeds