Process for preparing new 3,3-diphenylpropylamines.

NEW 3.3 DIFENILPROPILAMINOS of formula (I) wherein R1, R2, R3 and R4 have the meanings given in the description, physiologically acceptable salts thereof, and when PUEDENFORMAR COMPONENTS OPTICAL ISOMERS, racemic MIXTURE AND INDIVIDUAL CUANTIOMEROS, ITS USE AS DRUGS, ESPECIALLY AS anticholinergic agents, PREPARE FOR YOUR USE A DRUG anticholinergic, Pharmaceutical compositions containing NEW amines and methods for preparing them.