AN IMPROVED PROCESS FOR THE PREPARATION OF BISOPROLOL AND ITS INTERMEDIATE

摘要

The present invention provides an improved process for the preparation of 4-((2-isopropoxy ethoxy) methyl) phenol compound (I), used as an intermediate in many organic synthesis; particularly a key intermediate for the synthesis of l-[4[2(l-methylethoxy) ethoxy methyl] phenoxy]-3-(l-methylethylamino)-propan-2-ol; commonly known as Bisoprolol or its pharmaceutically acceptable salts. The process comprises reacting the 4-hydroxybenzyl alcohol (II) with the 2-isopropoxyethanol (III) in the presence of activated silica and optionally, in the presence of solvent.