作者:Margaret A Brimble、Geoffrey M Williams、Raymond Baker、Mark James
DOI:10.1016/s0040-4039(00)89021-8
日期:——
important iodohydrin intermediate has been accomplished by a highly efficient reaction of an epoxide with LiI catalysed by BF3.Et2O in THF. Displacement of the resulting neopentyl iodide was achieved in high yield by reaction of the iodide with potassium superoxide in dimethylsulphoxide/tetrahydrofuran in the presence of 18-crown-6.
描述了在C-2处带有羟甲基的双-螺缩醛(15)的合成,建立了制备聚醚抗生素沙利霉素和萘灵的方法。重要的碘代醇中间体的形成是通过BF 3 .Et 2 O在THF中催化的环氧化物与LiI的高效反应来完成的。通过在18-冠-6存在下,使碘化物与超氧化钾在二甲亚砜/四氢呋喃中反应,以高收率实现所得新戊基碘的置换。