AN IMPROVED AND EFFICIENT PROCESS FOR THE PREPARATION OF HIGHLY PURE CRYSTALLINE FORM OF ERLOTINIB HYDROCHLORIDE

摘要

The present invention discloses an improved and efficient process for preparing anti cancer drug Erlotinib hydrochloride by reacting 4-chloro-6,7-bis(2-methoxyethoxy)quinazoline (II) with 3-ethynylaniline(III) in suitable solvents.