作者:Cheol H. Yoon、David L. Flanigan、Kyung S. Yoo、Kyung W. Jung
DOI:10.1002/ejoc.200600835
日期:2007.1
Reported herein is a novel synthesis of clasto-lactacystin β-lactone. The γ-lactam core was selectively prepared by an intramolecular C–H insertion to establish the stereocenter, C(6). The ensuing construction of the quaternary C(5) and carbinol C(9) centers was facilitated by aldol with excellent stereoselection. All these new stereochemistries were induced by the inherent chirality of L-serine without
本文报道了一种新的 clasto-lactacystin β-内酯合成方法。γ-内酰胺核心是通过分子内 C-H 插入选择性制备的,以建立立体中心 C(6)。随后的四元 C(5) 和甲醇 C(9) 中心的建设是由具有出色立体选择的 aldol 促进的。所有这些新的立体化学都是由 L-丝氨酸的固有手性诱导的,无需使用手性助剂或试剂。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)