The first asymmetric ring-expansion carbonylation of meso-epoxides to β-lactones is reported. Two structurally diverse chiral Cr(III) chloro complexes in conjunction with Co2(CO)8 were shown to be competent catalytic systems for this transformation, displaying significant levels of asymmetric induction of up to 56% ee.
首次报道了介
环氧化物与 β-内酯的不对称扩环羰基化反应。研究表明,两种结构不同的手性
铬(III)氯配合物与 Co2(CO)8 共同组成的催化体系能够胜任这一转化过程,并显示出高达 56% ee 的显著不对称诱导
水平。