Piperazine, piperidine and tetrahydropyridine derivative of indol- 3- alkyl as 5-HT.sub.1D- agonists

摘要

Compounds of formula (I), or a salt or prodrug thereof, wherein Z represents an optionally substituted five-membered heteroaromatic ring selected from furan, thiophene, pyrrole, oxazole, thiazole, isoxazole, isothiazole, imidazole, pyrazole, oxadiazole, thiadiazole, triazole and tetrazole; E represents a chemical bond or a straight or branched alkylene chain containing from 1 to 4 carbon atoms; Q represents a straight or branched alkylene chain containing from 1 to 6 carbon atoms, optionally substituted in any position by a hydroxy group; T represents nitrogen or CH; U represents nitrogen or C--R.sup.2 ; V represents oxygen, sulphur or N--R.sup.3 ; --F--G-- represents --CH2--N--, --CH2-- CH-- or - -CHC--; R.sup.1 represents C.sub.3-6 alkenyl, C. sub.3-6 alkynyl, aryl(C.sub.1-6)alkyl or heteroaryl(C.sub.1-6)alkyl, any of which groups may be optionally substituted; and R.sup.2 and R.sup.3 independently represent hydrogen or C.sub.1-6 alkyl are selective agonists of 5-HT1D receptors, being potent agonists of the human 5- HT1Dalpha receptor subtype, while possessing at least a 10-fold selective affinity for the 5- HT1Dalpha receptor subtype, relative to the 5- HT1Dbeta subtype; they are therefore useful in the treatment and/or prevention of clinical conditions, in particular migraine and associated disorders, for which a subtype-selective agonist of 5-HT1D receptors is indicated, while eliciting fewer side-effects, notably adverse cardiovascular events, than those associated with non-subtype-selective 5- HT1D receptor agonists.