申请人:Jyothi Prasad Ramanadham
公开号:US20090306377A1
公开(公告)日:2009-12-10
The present invention discloses an improved and novel process for the preparation of erlotinib (N-(3-ethynylphenyl)-6,7-bis(2-methoxyethoxy)-4-quinazolinamine) of formula (1), which comprises: (i) demethylation of commercially available 6,7-dimethoxy-4(3H)-quinazolinone of formula (8); acetylation using acetic anhydride; (iii) introduction of a leaving group at C-4 position in quinazolinone; (iv) condensation with 3-ethynylaniline to get novel compound of formula (12); (v) deacetylation to get novel dihydroxy compound of formula (13); and (vi) O-alkylation with 2-iodoethylmethyl ether to get the erlotinib base of formula (1). Erlotinib base is purified by recrystallization from ethyl acetate to get a HPLC purity of >99.5%. Salt formation of this base with hydrogen chloride gave pharmaceutically acceptable erlotinib hydrochloride of formula (1
a
) with a HPLC purity of >99.8%. Erlotinib hydrochloride is useful for the treatment of proliferative disorders, such as cancers, in humans.
本发明公开了一种改进和新颖的制备厄洛替尼(N-(3-乙炔基苯基)-6,7-双(2-甲氧基乙氧基)-4-喹唑啉胺)的方法,其包括:(i)对式(8)的商业可得的6,7-二甲氧基-4(3H)-喹唑啉酮进行去甲基化;(ii)使用乙酸酐进行乙酰化;(iii)在喹唑啉酮的C-4位置引入离去基;(iv)与3-乙炔基苯胺缩合,得到式(12)的新化合物;(v)去乙酰化,得到式(13)的新二羟基化合物;(vi)使用2-碘乙基甲醚进行O-烷基化,得到式(1)的厄洛替尼碱。通过乙酸乙酯重结晶纯化厄洛替尼碱,可获得>99.5%的HPLC纯度。将此碱与氢氯酸形成盐,得到具有>99.8%的HPLC纯度的药用可接受的厄洛替尼氢氯酸盐(1a)。厄洛替尼氢氯酸盐对于治疗人类的增殖性疾病,如癌症,具有用途。