申请人:Winter Stephen Benedict David
公开号:US08440825B2
公开(公告)日:2013-05-14
This invention provides a novel dicarboxylic acid salt forms of varenicline, namely varenicline fumarate, and methods for making same. Varenicline salts are useful for treating smoking addition. In one embodiment of the instant invention, the varenicline fumarate shows an XRD pattern (2θ)) (±0.2° having characteristic peaks at 10.6, 11.9, 13.2, 16.2, 16.6, 18.0, 21.5, 22.6, 25.7, 28.5 and 29.1°. In another embodiment, the varenicline fumarate is prepared by (i) contacting varenicline with fumaric acid, optionally in the presence of a suitable solvent, and removing the solvent when necessary, or (ii) contacting varenicline fumarate salt with a suitable solvent, and removing the solvent.
本发明提供了一种新颖的
瓦伦尼克林二
羧酸盐形式,即
瓦伦尼克林富马酸盐,并提供了制备方法。
瓦伦尼克林盐对于治疗吸烟成瘾有用。在本发明的一种实施例中,
瓦伦尼克林富马酸盐显示出XRD图案(2θ)(±0.2°),在10.6、11.9、13.2、16.2、16.6、18.0、21.5、22.6、25.7、28.5和29.1°处具有特征峰。在另一种实施例中,
瓦伦尼克林富马酸盐是通过(i)将
瓦伦尼克林与
富马酸接触,必要时在适当溶剂的存在下,去除溶剂,或(ii)将
瓦伦尼克林富马酸盐与适当溶剂接触,并去除溶剂而制备的。