Present process relates to an improved and commercial process for the preparation of lapatinib of formula-I or its pharmaceutically acceptable p-toluenesulfonate salt involving novel intermediates of formulae-XVII, XVIII, and XIX. Present process utilizes Meerwein reaction as a key step in the aryl C-C bond formation step avoiding costly boronate coupling chemistry used in the conventional synthesis of lapatinib.
目前的工艺涉及一种改进的商业化工艺,用于制备公式-I的
拉帕替尼或其药用可接受的
对甲苯磺酸盐,涉及到公式-XVII、XVIII和XIX的新型中间体。目前的工艺利用Meerwein反应作为芳基C-C键形成步骤中的关键步骤,避免了传统合成
拉帕替尼时使用昂贵的
硼酸酯偶联
化学方法。