Stereospecific Syntheses of Chiral Epoxides Bearing 1,4‐Diyne or 1,4‐Enyne Unit Via Alkylative Epoxide Rearrangement
作者:Chao Che、Zhongning Zhang
DOI:10.1081/scc-200043198
日期:2004.1
Abstract Stereospecific syntheses of a series of chiral epoxides bearing the 1,4‐diyne or 1,4‐enyne unit were achieved through alkylative epoxide rearrangement, which proceeded in two steps: 1) coupling of epoxy tosylate with alkynyltrifluoroborate; and 2) ring‐closure of the resulting intermediate.
A Concise, Protection-Free and Divergent Approach for the Enantioselective Syntheses of Two Pheromonal Epoxide Components of the Fall Webworm Moth and Other Species
On the basis of Zhou’s modified Sharpless asymmetric epoxidation, sequential coupling reactions, and a divergent strategy, the protection-free syntheses of two main pheromonal components 1 and 5, found in the fall webworm moth, Hyphantria cunea, and other species have been accomplished in 10 steps (for two compounds). The overall yields are 31% for 1, 28% for 5, and 25% for both 1 and 5, respectively