The present invention relates to a novel process for the preparation of Etravirine, comprises; condensing ethyl cyanoacetate with N-cyanophenylguanidine to obtain -OH compound of formula (II), which is further converted to a leaving group of formula (III). Compound of formula (III) is optionally protected and brominated to yield compound of formula (IV). Condensation of formula (IV) with 3,5-dimethyl-4-hydroxybenzonitrile gives formula (VI), and an optional deprotection of formula (VI) results into Etravirine. The present invention further relates to process for purifying Etravirine. The present invention also provides novel intermediates of Etravirine.
本发明涉及一种制备培拉韦林的新工艺,包括以下步骤:将乙基
氰乙酸酯与N-
氰基苯基
脲缩合,得到式(II)的-OH化合物,进一步转化为式(III)的离去基。式(III)的化合物可选择性地保护并
溴化,得到式(IV)的化合物。将式(IV)的化合物与
3,5-二甲基-4-羟基苯甲腈缩合,得到式(VI)的化合物,对式(VI)的可选择性去保护后得到培拉韦林。本发明还涉及纯化培拉韦林的工艺。本发明还提供了培拉韦林的新中间体。