申请人:Kankan Rajendra Narayanrao
公开号:US20080234492A1
公开(公告)日:2008-09-25
A process for the preparation of carvedilol of formula (I) (I) either in enantiomeric substantially pure form, or as an enantiomeric mixture, optionally as a pharmaceutically acceptable salt thereof, which process comprises reacting 2,3-eopxypropoxy carbazole of formula (II) (II) or the R or S enantiomer thereof, with N-[2-(2-methoxy-phenoxy)ethyl]-benzylamine of formula (V) (V) to yield benzyl carvedilol of formula (VI) (VI) which is debenzylated by catalytic hydrogenation to yield carvedilol of formula (I), either in enantiomeric substantially pure form, or as an enantiomeric mixture, and if desired reacting the thus formed carvedilol of formula (I) with an inorganic or organic acid to yield a pharmaceutically acceptable salt thereof, and/or, if desired, separating the enantiomers. The above process is characterised in that reaction of said 2,3-epoxypropoxy carbazole of formula (II) with said N-[2-(2-methoxy-phenoxy)ethyl]-benzylamine of formula (V) is carried out in water as the reaction medium. The present invention further provides carvedilol of formula (I) prepared by a process as described above, and pharmaceutical compositions containing the same and therapeutic uses thereof.
一种制备公式(I)的卡维地洛的方法,其中(I)可以是对映异构体纯形式,也可以是对映异构体混合物,可以是其药学上可接受的盐,该方法包括将公式(II)的2,3-环氧丙氧基咔唑或其R或S对映体与公式(V)的N-[2-(2-甲氧基苯氧基)乙基]-苄胺反应,以得到公式(VI)的苄基卡维地洛,通过催化氢化去苄基,得到公式(I)的卡维地洛,可以是对映异构体纯形式,也可以是对映异构体混合物,如果需要,可以将得到的公式(I)的卡维地洛与无机或有机酸反应,以得到其药学上可接受的盐,并且,如果需要,可以分离对映体。上述方法的特点在于,公式(II)的2,3-环氧丙氧基咔唑与公式(V)的N-[2-(2-甲氧基苯氧基)乙基]-苄胺的反应在水中作为反应介质进行。本发明进一步提供了通过上述方法制备的公式(I)的卡维地洛,以及含有其的药物组合物和其治疗用途。