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.
Development of C–N coupling processes is fundamentally important and challenging for the synthesis of biologically active molecules and drugs. Herein, we report a highly atom efficient green process for the synthesis of α-ketoamides via visible-light induced copper(I) chloride catalysed direct oxidative Csp–N coupling reactions using commercially available alkynes and anilines at room temperature without
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.