Process for the preparation of tazarotene intermediates and use thereof for the preparation of tazarotene
申请人:KUMAR Venkata Siva Bobba
公开号:US20070238881A1
公开(公告)日:2007-10-11
The present invention provides a novel intermediate of ethyl 6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl] nicotinate or a pharmaceutically acceptable salt thereof and a process for its preparation. The present invention also provides for the preparation of ethyl 6-[2-(4,4-dimethylthiochroman-6-yl)ethynyl] nicotinate of Formula I or a pharmaceutically acceptable salt thereof using the intermediate.
本发明提供了乙酰基6-[2-(4,4-二甲基硫代色曼-6-基)乙炔基]烟酸乙酯的新型中间体或其药用可接受盐的制备方法。本发明还提供了利用该中间体制备乙酰基6-[2-(4,4-二甲基硫代色曼-6-基)乙炔基]烟酸乙酯的制备方法,其化学式为I,或其药用可接受盐。