| abstract |
Compounds of formula (I) are inhibitors of CD80 and useful in immunomodulation therapy: wherein R 1 and R 3 independently represent H; F; CI; Br; —NO 2 ; —CN; C 1 -C 6 alkyl optionally substituted by F or Cl; or C 1 -C 6 alkoxy optionally substituted by F; R 4 represents a carboxylic acid group (—COOH) or an ester thereof, or —C(═O)NR 6 R 7 , —NR 7 C(═O)R 6 , —NR 7 C(═O)OR 6 , —NHC(═O)NR 7 R 6 or —NHC(═S)NR 7 R 6 wherein R 6 represents H, or a radical of formula -(Alk) m -Q wherein m is 0 or 1, Alk is an optionally substituted divalent straight or branched C 1 -C 12 alkylene, or C 2 -C 12 alkenylene, or C 2 -C 12 alkynylene radical or a divalent C 3 -C 12 carbocyclic radical, any of which radicals may contain one or more —O—, —S— or —N(R 8 )— links wherein R 8 , represents H or C 1 -C 4 alkyl, C 3 -C 4 alkenyl, C 3 -C 4 alkynyl, or C 3 -C 6 cycloalkyl, and Q represents H; —NR 9 R 10 wherein R 9 and R 10 independently represents H; C 1 -C 4 alkyl; C 3 -C 4 alkenyl; C 3 -C 4 alkynyl; C 3 -C 6 cycloalkyl; an ester group; an optionally substituted carbocyclic or heterocyclic group; or R 9 and R 10 form a ring when taken together with the nitrogen to which they are attached, which ring is optionally substituted; and R 7 represents H or C 1 -C 6 alkyl; or when taken together with the atom or atoms to which they are attached R 6 and R 7 form an optionally substituted monocyclic heterocyclic ring having 5, 6 or 7 ring atoms; and X represents a bond or a divalent radical of formula -(Z) n -(Alk)- or -(Alk)-(Z) n -wherein Z represents —O—, —S— or —NH—, Alk is as defined in relation to R 6 , and n is 0 or 1 |