A general method for synthesis of cis-dicarbonyl epoxides through DBU/LiBr-cocatalyzed cyclization of α,β-dicarbonyl peroxides
作者:Zhenzhen Zong、Xiaohui Bai、Shenglin Lu、Zhiping Li
DOI:10.1016/j.tetlet.2016.07.034
日期:2016.8
A generalmethod for synthesis of cis-dicarbonyl epoxides is developed. The highly diastereoselective cyclization of α,β-dicarbonyl peroxides is achieved by DBU/LiBr cocatalysis. The coordination of lithium ion with two carbonyl groups is proposed for the control of cis selectivity.