Enantioselective Baeyer–Villiger Oxidation: Desymmetrization of Meso Cyclic Ketones and Kinetic Resolution of Racemic 2-Arylcyclohexanones
作者:Lin Zhou、Xiaohua Liu、Jie Ji、Yuheng Zhang、Xiaolei Hu、Lili Lin、Xiaoming Feng
DOI:10.1021/ja309262f
日期:2012.10.17
N'-dioxide-Sc(III) complex catalysts. The BV oxidations of prochiral cyclohexanones and cyclobutanones afforded series of optically active ε- and γ-lactones, respectively, in up to 99% yield and 95% ee. Meanwhile, the kinetic resolution of racemic 2-arylcyclohexanones was also realized via an abnormal BV oxidation. Enantioenriched 3-aryloxepan-2-ones, whose formation is counter to the migratory aptitude, were
在手性 N,N'-二氧化物-Sc(III) 配合物催化剂存在下,实现了外消旋和内消旋环酮的催化对映选择性 Baeyer-Villiger (BV) 氧化。前手性环己酮和环丁酮的 BV 氧化分别提供了一系列具有光学活性的 ε- 和 γ-内酯,产率高达 99%,ee 高达 95%。同时,外消旋 2-芳基环己酮的动力学拆分也是通过异常 BV 氧化实现的。Enantioenriched 3-aryloxepan-2-ones,其形成与迁移能力相反,被优先获得。内酯和未反应的酮均具有高 ee 值。