The present application relate to a process for preparation of 4-methylene tetrahydrofuran compound of formula II, which is useful as an intermediate for the preparation of halichondrin B analogues such as eribulin and its pharmaceutically acceptable salts thereof. The present application also provide crystalline compound of formula III and crystalline compound of formula II.
本申请涉及一种制备4-亚甲基
四氢呋喃化合物的方法,该化合物的
化学式为II,可用作制备halichondrin B类似物(如厄立宾及其药用可接受盐)的中间体。本申请还提供
化学式III的结晶化合物和
化学式II的结晶化合物。