HETEROCYCLIC CARBOXAMIDE DERIVATIVES WITH ANTIARRHYTHMIC ACTIVITY

A compound of formula (I), or a salt thereof, or a solvate thereof, wherein A and B each independently represents a C1-4 n-alkylene group wherein each carbon is optionally substituted by a C1-6 alkyl group; D represents CO, SO2, NH-CO or CH2CO; T represents hydrogen, alkyl, alkene or cycloalkyl; and Het represents substituted or unsubstituted: furanyl, pyranyl, thienyl, thiazolyl, imidazolyl, triazolyl or the benzo fused equivalents of furanyl, pyranyl, thienyl, thiazolyl, imidazolyl, or triazolyl, indolyl, oxoindolyl, indenyl, isoindenyl, indazolyl, indolizinyl, or benzofurazanyl; optional substituents for the moiety Het include 1 to 5 substituents selected from the list consisting of nitro, halogen, alkylsulfonamido, alkylamido, 1H-imidazolyl, alkyl and haloalkyl; R1, R2 and R3 each independently represent H, alkyl, OH or alkoxy or, if attached to adjacent carbon atoms, any two of R1, R2 or R3 together with the carbon atoms to which they are attached may form a fused heterocyclic ring of five to six atoms wherein one, two or three of the said atoms are oxygen or nitrogen; Z represents a bond, CH2, (CH2)2 or X-CH2-CH2 wherein X represents O or S; and Ar represents substituted or unsubstituted aryl, wherein the optional substituents are the above defined R1, R2 and R3; a composition containing such compound, a process for the preparation of such a compound and the use of such a compound in medicine.