申请人:Dwivedi Shriprakash Dhar
公开号:US20130197260A1
公开(公告)日:2013-08-01
The invention relates to improved process for the preparation of fesoterodine and its pharmaceutically acceptable salt, specifically fesoterodine fumarate of formula (1). The invention relates to solid state forms of a novel salt of fesoterodine and process for the preparation thereof. The invention also relates to highly pure fesoterodine fumarate substantially free of impurity X at RRT 1.37. The invention also provides solid particles of pure fesoterodine fumarate wherein 90 volume-percent of the particles (D90) have a size of higher than 200 microns.
本发明涉及改进的制备fesoterodine及其药学上可接受的盐,特别是fesoterodine富马酸盐的过程,其化学式为(1)。本发明涉及fesoterodine的新型盐的固态形式及其制备过程。本发明还涉及高纯度fesoterodine富马酸盐,其在RRT 1.37时基本无杂质X。本发明还提供纯度高的fesoterodine富马酸盐的固体颗粒,其中90体积百分比(D90)的颗粒尺寸大于200微米。