Diastereoselective synthesis of ring-fused thiocarbamates bearing contiguous quaternary carbon centers
摘要:
An efficient DMAP catalyzed tandem aldol/imidization reaction of alpha-isothiocyanato esters with alpha-ketoamides is described, affording ring-fused thiocarbamates bearing contiguous quaternary carbon centers with up to 99% yield in a completely diastereoselective fashion. This method has a wide range of substrate scope and can be used in the synthesis of pyrrolidines. (c) 2013 Elsevier Ltd. All rights reserved.