Carboxylic acid derivatives, processes for the preparation thereof, the use thereof and pharmaceutical compositions containing them

Abstract From the Canadian patent

New carboxylic acid derivatives processes for the, preparation thereof the use thereof and pharma-, ceutical compositions containing them The present invention provides carboxylic acid derivatives of the general formula:-, (I) wherein R1 is an optionally substituted aryl or aryloxy radical, R2 is a hydrogen atom, a lower alkyl radical or an R1-A- radical and, when X is a cyano group R2, can also be an acylamino or amino radical A is a, straight-chained or branched, saturated or unsaturated alkylene radical containing 3 to 8 carbon atoms which has a chain length of at least 3 carbon atoms X is a, cyano group or a radical of the general formula -B-R3 or -D-NR4R5, in which B is O, S, SO, SO2 …