Improved one-pot synthesis of N, N-diisopropyl-3-(2-Hydroxy-5-methylphenyl)-3-phenyl propanamide; a key intermediate for the preparation of racemic Tolterodine

An improved, cost effective process for the synthesis of N,N -diisopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenylpropanamide; a key intermediate for the preparation of Tolterodine and its related substances were described. The process features one pot synthesis employing inexpensive reagents.