Abstract: Compounds of formula (I), processes for their preparation and their use in medicine are disclosed: ##STR1## wherein: P represents phenyl, a quinoline or isoquinoline residue, or a 5-membered or 6-membered aromatic heterocyclic ring containing up to three heteroatoms selected from nitrogen, oxygen or sulphur;R.sup.1 is hydrogen, C.sub.1-6 alkyl, halogen, CF.sub.3, NR.sup.7 R.sup.8 or OR.sup.9 where R.sup.7, R.sup.8 and R.sup.9 are independently hydrogen, C.sub.1-6 alkyl or arylC.sub.1-6 alkyl;R.sup.2 is hydrogen or C.sub.1-6 alkyl;R.sup.3 is C.sub.1-6 alkyl;n is 0 to 3;m is 0 to 4; andR.sup.4 groups are independently C.sub.1-6 alkyl optionally substituted by one or more halogen atoms, C.sub.2-6 alkenyl, C.sub.2-6 alkynyl, C.sub.3-6 cycloalkyl, C.sub.3-6 cycloalkyl-C.sub.1-6 alkyl, C.sub.1-6 alkylthio, C.sub.3-6 cycloalkylthio, C.sub.3-6 cycloalkylC.sub.1 C.sub.6 alkylthio, halogen, nitro, CF.sub.3, OCF.sub.3, SCF.sub.3, SO.sub.2 CF.sub.3, SO.sub.2 F, formyl, C.sub.

Abstract: Compound of formula (1), processes for their preparation and their use as CNS agents are disclosed, in which A is CONR where R is hydrogen or C.sub.1-6 alkyl; Q is an optionally substituted 5 to 7-membered heterocyclic ring containing 1 to 3 heteroatoms selected from oxygen, nitrogen or sulphur, R.sup.1 is hydrogen, halogen, C.sub.1-6 alkyl, C.sub.3-6 cycloalkyl, COC.sub.1-6 -alkyl, C.sub.1-6 alkoxy, hydroxy, hydroxyC.sub.1-6 alkyl, hydroxyC.sub.1-6 alkoxy, C.sub.1-6 alkoxyC.sub.1-6 alkoxy, acyl, nitro, trifluoromethyl, cyano, SR.sup.9, SOR.sup.9, SO.sub.2 R.sup.9, SO.sub.2 NR.sup.10 R.sup.11, CO.sub.2 R.sup.10, CONR.sup.10 R.sup.11, CO.sub.2 NR.sup.10 R.sup.11, CONR.sup.10 (CH.sub.2).sub.a CO.sub.2 R.sup.11, (CH.sub.2).sub.a NR.sup.10 R.sup.11, (CH.sub.2).sub.a CONR.sup.10 R.sup.11, (CH.sub.2).sub.a NR.sup.10 COR.sup.11, (CH.sub.2).sub.a CO.sub.2 C.sub.1-6 alkyl, CO.sub.2 (CH.sub.2).sub.a OR.sup.10, NR.sup.10 R.sup.11, NR.sup.10 CO.sub.2l R.sup.11, NR.sup.10 CONR.sup.10 R.sup.11, CR.sup.10 =NOR.sup.11, CNR.