A PROCESS FOR THE PREPARATION OF TOLTERODINE TARTRATE

摘要

The present invention relates to provide an improved process for the preparation of tolterodine or salt thereof, comprises a step of reducing 3-(2-methoxy-5-methylphenyl) -3-phenyl propionic acid of formula (III) in the presence of a reducing agent, an acidic reagent and a solvent to obtain 3-(2-methoxy-5-methylphenyl) -3-phenyl propanol of formula (IV).