New urea derivatives having a cat inhibitory activity their preparation and their therapeutic and prophylactic use

摘要

Compounds of formula (I): wherein: R<1> is alkyl; R<2a>, R<2b>, R<2c> and R<2d> are the same or different and each is hydrogen, optionally substituted alkyl or various other organic groups; R<3> is alkyl; R<4> is a group of formula (II), (III), (IV), (V), (VI), (VII), (VIII) or (IX): wherein: A<1> is a single bond, alkylene or alkenylene; A<2> is or alkenylene; A<3> is a single bond, alkyleneor alkenylene; R<5a> and R<5b> are the same or different and each is hydrogen, alkyl or various other groups; R<6> is alkyl or phenyl; R<7> is hydrogen or alkyl; R<8> is alkyl or various other groups; and n is 0 or 1Ü and pharmaceutically acceptable salts thereof have valuable inhibitory activity against acyl-CoA: cholesterol acyl transferase.