A process of preparing rosiglitazone, or a pharmaceutically acceptable salt thereof, which process employs an intermediate metabisulphite complex of 4-[2-(N-methyl-N-(2-pyridyl)amino) ethoxy] benzaldehyde, which metabisulphite complex is represented by following formula (III); where X represents an alkali metal. The present invention further provides rosiglitazone, or a pharmaceutically acceptable salt thereof, prepared by the above process.
一种制备
罗格列酮或其药学上可接受的盐的方法,该方法采用4-[2-(N-甲基-N-(2-
吡啶基)
氨基)乙氧基]
苯甲醛的
亚硫酸氢盐复合物作为中间体,该
亚硫酸氢盐复合物由以下式(III)表示;其中X表示一种碱
金属。本发明还提供了通过上述方法制备的
罗格列酮或其药学上可接受的盐。