| abstract |
Compounds of formula (I) are ligands of the CRTH2 receptor and are useful in the treatment of respiratory disease: Formula (I) wherein R1, R2, R3 and R4 each independently are hydrogen, C1C6alkyl, fully or partially fluorinated C1C6alkyl, halo, -S(O)nR10, -SO2N(R10)2, -N(R10)2, -C(O)N(R10)2, -NR10C(O)R9, -CO2R10, -C(O)R9, -NO2, -CN or -OR11; wherein each R9 is independently C1C6alkyl, aryl, heteroaryl; R10 is independently hydrogen, C1C6alkyl, aryl, or heteroaryl; R11 is hydrogen, C1C6alkyl, fully or partially fluorinated C1C6alkyl or a group -SO2R9; n is 0, 1 or 2; R5 is C1C6alkyl, fully or partially fluorinated C1C6alkyl , C1C6alkenyl , C1C6alkynyl, optionally substituted aryl, or optionally substituted heteroaryl; R6 is hydrogen, C1C6alkyl or fully or partially fluorinated C1C6alkyl ; R7 and R8 are independently hydrogen or C1C6alkyl, or R7 and R8 together with the atom to which they are attached form a cycloalkyl group; and X is -CHR6-, -S(O)n-, -NR6SO2- or -SO2NR6- wherein n is 0, 1 or 2. |