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 (1a) with a HPLC purity of >99.8%. Erlotinib hydrochloride is useful for the treatment of proliferative disorders, such as cancers, in humans.
本发明揭示了一种改进和新颖的过程,用于制备式(1)的
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),其中包括:(i)将商业上可得的式(8)的6,7-二甲氧基-4(3H)-
喹唑啉酮脱甲基化;(ii)使用
乙酸酐进行乙酰化;(iii)在
喹唑啉酮的C-4位置引入一个离去基;(iv)与3-
乙炔基
苯胺缩合,得到式(12)的新化合物;(v)脱乙酰基,得到式(13)的新双羟基化合物;(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。通过从
乙酸乙酯中重结晶纯化
厄洛替尼碱,可获得HPLC纯度> 99.5%。将此碱与氢
氯酸盐形成盐,可获得药学上可接受的式(1a)的
厄洛替尼盐酸盐,其HPLC纯度> 99.8%。
厄洛替尼盐酸盐对于治疗人类的增殖性疾病,例如癌症,是有用的。