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.
[EN] NOVEL FLUORINATED DERIVATIVES AS EGFR INHIBITORS USEFUL FOR TREATING CANCERS<br/>[FR] NOUVEAUX DÉRIVÉS FLUORÉS UTILISÉS EN TANT QU'INHIBITEURS D'EGFR UTILES POUR LE TRAITEMENT DE CANCERS
申请人:TRILLIUM THERAPEUTICS INC
公开号:WO2016123706A1
公开(公告)日:2016-08-11
A novel class of fluorinated derivatives of Formula I have been prepared and found to be useful in the treatment of cancers and other EGFR related disorders.
The present invention provides an improved and commercially viable process for preparation of erlotinib substantially free of N-methoxyethyl impurity, namely N-[(3-ethynylphenyl)-(2-methoxyethyl)]-6,7-bis(2-methoxyethoxy)-4-quinazolinamine, and its pharmaceutically acceptable acid addition salts thereof in High purity and in high yield. According to the present invention, erlotinib or a pharmaceutically acceptable acid addition salt of erlotinib substantially free of N-methoxyethyl impurity is prepared by isolating erlotinib or a pharmaceutically acceptable salt of erlotinib from a solvent medium comprising dimethyl sulfoxide and an alcoholic solvent.
This invention relates to novel quinazoline derivatives, and their pharmaceutically acceptable salts. The invention also provides compositions comprising a compound of this invention and the use of such compositions in methods of treating diseases and conditions beneficially treated by inhibiting cell surface tyrosine receptor kinases.