Preparation process of erlotinib or its salts comprising: reacting 6,7-bis(2-methoxyethoxy)-4-methoxyquinazoline with 3-ethynylaniline or a salt thereof in the presence of a base and a reaction-inert solvent, and optionally, treating the compound obtained with a pharmaceutically acceptable acid to form the corresponding pharmaceutically acceptable salt. The compound 6,7-bis(2-methoxyethoxy)-4-methoxyquinazoline can be prepared either from 4-methoxyquinazoline-6,7-diol or 6,7-bis(2-methoxyethoxy)quinazolinone. The compounds 6,7-bis(2-methoxyethoxy)-4-methoxyquinazoline and 4-methoxyquinazoline-6,7-diol are new intermediates useful for the preparation of erlotinib or its salts.
厄洛替尼或其盐的制备过程包括:在碱和反应惰性溶剂的存在下,将6,7-
双(2-甲氧基乙氧基)-
4-甲氧基喹唑啉与3-
乙炔基
苯胺或其盐反应,可选地,用药用可接受的酸处理所得化合物,形成相应的药用可接受的盐。化合物6,7-
双(2-甲氧基乙氧基)-
4-甲氧基喹唑啉可以从
4-甲氧基喹唑啉-6,7
-二醇或6,7-
双(2-甲氧基乙氧基)喹唑酮制备。化合物6,7-
双(2-甲氧基乙氧基)-
4-甲氧基喹唑啉和
4-甲氧基喹唑啉-6,7
-二醇是用于制备
厄洛替尼或其盐的新中间体。