Stable acid addition salts of bosentan useful for the purification of bosentan base; the salts are in solid state and the starting acid has a pKa lower than 3.
稳定的鲍生坦盐酸盐可用于纯化鲍生坦碱;这些盐处于固态,起始酸的pKa值低于3。
BOSENTAN CONTROLLED RELEASE ORAL PREPARATION
申请人:Hanall Biopharma Co., Ltd.
公开号:EP2848245A1
公开(公告)日:2015-03-18
Provided are an extended release preparation for oral administration of bosentan including bosentan, a pharmaceutically acceptable salt thereof or a solvate thereof as an active ingredient and a hydrophilic polymer as a sustained release excipient, and a method of manufacturing the same. Accordingly, the number of administrations of the bosentan, a pharmaceutically acceptable salt thereof or a solvate thereof may be reduced, thereby enhancing ease of administration and patient compliance. In addition, the extended release preparation for oral administration of bosentan may be effectively manufactured.
The invention relates to stable acid addition salts of bosentan useful for the purification of bosentan base; the salts are in solid state and the starting acid has a pKa lower than 3, a process of making the salts and use in medicine, and a process for prurifying bosentan base.