Highly Diastereoselective Synthesis of β-Carboxy-γ-lactams and Their Ethyl Esters via Sc(OTf)<sub>3</sub>-Catalyzed Imino Mukaiyama-Aldol Type Reaction of 2,5-Bis(trimethylsilyloxy)furan with Imines
作者:Manat Pohmakotr、Nattawut Yotapan、Patoomratana Tuchinda、Chutima Kuhakarn、Vichai Reutrakul
DOI:10.1021/jo070533r
日期:2007.6.1
Functionalized γ-lactams are found to be crucial intermediates in the synthesis of biologically important natural products. We herein described a highly diastereoselective synthesis of β-carboxy-γ-lactams and their ethyl ester derivatives, in high yields with high diastereomeric ratio, via the Mukaiyama-aldol type reaction of 2,5-bis(trimethysilyloxy)furan with imines, employing Sc(OTf)3 as a catalyst.
发现功能化的γ-内酰胺是生物重要的天然产物合成中的关键中间体。我们在本文中描述了通过2,5-双(三甲基甲硅烷基氧基)呋喃与亚胺的Mukaiyama-aldol型反应,以高收率和高非对映体比高产率合成β-羧基-γ-内酰胺及其乙酯衍生物的方法。 Sc(OTf)3作为催化剂。