Attempted kinetic resolution of 1,2-diols by camphorquinone: generation of (R)-(chloromethyl)oxirane
作者:Martin K. Ellis、Bernard T. Golding、Antony B. Maude、William P. Watson
DOI:10.1039/p19910000747
日期:——
The epichlorohydrin (R)-(chloromethyl)oxirane has been prepared from rac-3-chloropropane-1,2-diol by means of the chiral ketone D-camphorquinone (1,7,7-trimethylbicyclo[2.2.1] heptane-2,3-dione). These reactions lead to intermediate dioxolanes which can be converted directly into oxiranes. This conversion was effected by reduction of the C-2-ketone of the dioxolane intermediate with sodium borohydride
表氯醇(R)-(氯甲基)环氧乙烷是通过手性酮D-樟脑醌(1,7,7-三甲基双环[2.2.1]庚烷-2 )由外消旋-3-氯丙烷-1,2-二醇制得的,3-dione)。这些反应导致中间体二氧戊环,其可以直接转化为氧杂环丁烷。在与溴化氢-乙酸反应之前,先用硼氢化钠还原二氧戊环中间体的C-2-酮,然后再用乙烷-1,2-二醇钠处理所得的乙酰氧基溴,即可完成这种转化。还通过D-樟脑醌与乙烷-1,2-二醇,丙烷-1,2-二醇和D-樟脑醌的反应研究了其他二氧戊环的非对映选择性形成。3,3-二甲基丁烷-1,2-二醇。