The present invention provides a novel process for the purification of alpha-propargylhomoterephthalic acid dimethyl ester substantially free of homoterephthalic acid dimethyl ester. The present invention also provides a novel process for the purification of pralatrexate.
本发明提供了一种用于净化几乎不含有同苯二
甲酸二甲酯的α-
丙炔基同苯二
甲酸二甲酯的新工艺。本发明还提供了一种用于净化普拉曲塞的新工艺。