Enantioselective Synthesis of γ-Aryl-γ-butyrolactones by Sequential Asymmetric Epoxidation, Ring Expansion, and Baeyer−Villiger Oxidation
作者:Bin Wang、Yu-Mei Shen、Yian Shi
DOI:10.1021/jo061341j
日期:2006.12.1
N-tolyl-substituted oxazolidinone-containing ketone as catalyst and Oxone as oxidant via a sequential asymmetric epoxidation of benzylidenecyclopropanes, ring expansion, and Baeyer−Villiger oxidation. Up to 91% ee was obtained. Optically active cyclobutanones can also be obtained by suppressing the Baeyer−Villiger oxidation with use of more ketone catalyst and less Oxone.
本文描述了一种γ-丁内酯的对映体选择性合成方法,该方法通过使用亚苄基环丙烷的连续不对称环氧化,扩环和Baeyer-Villiger氧化,使用含N-甲苯基取代的恶唑烷酮的酮为催化剂,以Oxone为氧化剂。获得了高达91%的ee。光学活性的环丁酮也可以通过使用更多的酮催化剂和更少的Oxone抑制Baeyer-Villiger氧化而获得。