The titled reaction gave ethyl 2-chloro-2,3-epoxyalkanoates (2) and ethyl 3-chloro-2-oxoalkanoates in improved yields. The structure of the by-product was revised as 1,5-dichloro-4,8-dialkyltricyclo[5.1.0.03,5]octane-2,6-dione by means of the 13C–1H two-dimensional NMR spectrum and an X-ray crystallographic analysis. Compound 2 was applied to the synthesis of (±)-disparlure, the pheromone of the gypsy
标题反应以提高的产率得到2-
氯-2,3-环氧链烷酸
乙酯(2)和3-
氯-2-氧代链烷酸
乙酯。副产物的结构通过 13C–1H 二维核磁共振谱和 X 射线衍射谱修正为 1,5-二
氯-4,8-二烷基
三环[5.1.0.03,5]辛烷-2,6-二酮-射线晶体学分析。化合物 2 用于合成 (±)-disparlure,吉普赛蛾的信息素,通过 6 个步骤以 49% 的总产率合成。