The present invention relates to an improved process for the preparation of (5α, 6α)-17-allyl-6-(2, 5, 8, 11, 14, 17, 20- heptaoxadocosan-22-yloxy)-4, 5-epoxymorphinan-3, 14-diol which is represented by the following structural formula-1 or its pharmaceutically acceptable salts and also provides an improved process for the purification of the compound of formula-1 and its oxalate salt.
本发明涉及一种改进的制备(5α, 6α)-17-烯丙基-6-(2, 5, 8, 11, 14, 17, 20-七氧杂
二十二烷基氧基)-4, 5-环
氧吗啡-3, 14
-二醇(用以下结构式-1表示)或其药用盐的方法,同时提供了一种改进的该结构式-1化合物及其
草酸盐的纯化方法。