The present invention provides 2-(3,5-dimethyl-adamantan-1-yl)-isoindole-1,3-dione of formula II, which is useful as an intermediate in the preparation of memantine and its salts. The present invention also provides a process for preparing 2-(3,5-dimethyl-adamantan-1- yl)-isoindole-1,3-dione and a process for preparing memantine or a salt thereof using 2- (3,5-dimethyl-adamantan-1 -yl)-isoindole-1,3-dione.
本发明提供了式II的2-(3,5-二甲基-孔雀石酮-1-基)-异
吲哚酮-1,3-二酮,其在制备美
金刚和其盐中作为中间体有用。本发明还提供了制备2-(3,5-二甲基-孔雀石酮-1-基)-异
吲哚酮-1,3-二酮和制备美
金刚或其盐的过程,使用2-(3,5-二甲基-孔雀石酮-1-基)-异
吲哚酮-1,3-二酮。