PROCESS FOR THE PREPARATION OF LAPATINIB

摘要

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.