The present invention relates to an improved process for the preparation of 1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-4-[[(2RS)-2,3,4,5-tetrahydrofuran-2-yl]carbonyl]piperazine hydrochloride dihydrate of Formula I, through an intermediate 1-(4-amino-6,7-dimethoxyquinazolin-2-yl)-4-[[(2RS)-2,3,4,5-tetrahydrofuran-2-yl]carbonyl]piperazine hydrochloride/hydrobromide (V).
本发明涉及一种改进的制备方法,用于制备式I的1-(
4-氨基-6,7-二甲氧基喹唑啉-2-基)-4-[[(2RS)-2,3,4,5-
四氢呋喃-2-基]羰基]
哌嗪盐酸盐
二水合物,通过中间体1-(
4-氨基-6,7-二甲氧基喹唑啉-2-基)-4-[[(2RS)-2,3,4,5-
四氢呋喃-2-基]羰基]
哌嗪盐酸盐/
溴化物(V)。