The present invention relates to a process for preparing compound of formula (I) that is Cleistanthin A. The process comprises the steps of reacting compound of formula (II) with compound of formula (III) in the presence of a first solvent, quarternary ammonium salt and first alkali to form compound of formula (IV). The compound of formula (IV) is further treated with a second solvent and a second alkali to form compound of formula (I). The present invention also relates to the preparation of salt of compound of formula (IV) that is Cleistanthin A acetate.
本发明涉及一种制备化合物的方法,该化合物的
化学式为(I),即克莱斯坦A。该方法包括以下步骤:在第一溶剂、季
铵盐和第一碱的存在下,将化合物的
化学式为(II)的化合物与
化学式为(III)的化合物反应,形成
化学式为(IV)的化合物。将
化学式为(IV)的化合物进一步用第二溶剂和第二碱处理,形成
化学式为(I)的化合物。本发明还涉及制备
化学式为(IV)的盐的方法,该盐即克莱斯坦A
乙酸盐。