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Abstract

Compounds of formula (I) and pharmaceutically acceptable salts thereof are disclosed: wherein A is optionally substituted phenyl, naphthyl, indolyl, quinolinyl, quinazolinyl, indazolyl, isoquinolinyl or benzofuranyl; b is 1, 2 or 3 and c is 1, 2 or 3, wherein b+c is 2, 3, 4 or 5; X is carbon, Y is CH, is a double bond and e is 0; or X is carbon, Y is CHor oxygen, is a single bond and e is 1; or X is nitrogen, Y is CH, is a single bond and e is 0; R1 is hydrogen, cyano, halogen, Calkyl, Calkoxy, CalkoxyCalkyl, NHCOCHor OCONR5R6, wherein R5 and R6 are independently hydrogen or Calkyl; R2 is halogen, cyano or Calkoxy; d is 0, 1, 2 or 3; R3 is hydrogen, Calkyl, Calkanoyl, fluoroCalkanoyl, Calkylsulfonyl, fluoroCalkylsulfonyl, carbamoyl, Calkylcarbamoyl or arylCalkyl; and R4, together with the nitrogen atom to which it is attached, forms an optionally substituted 5 to 7 membered heterocyclic group fused to the benzene ring, provided that when a compound of formula (I) has the following structure: wherein A, b, c, R1, e, X, Y, R2 and d are as defined above and R3 is hydrogen, Calkyl or arylCalkyl, then (i) X is carbon, Y is CH and is a double bond; or (ii) b and c are both 1; or (iii) the carbon atom adjacent to the oxo-substituted carbon atom in the morpholinyl ring, marked '★', is substituted. Methods of preparing the compounds and uses of the compounds in therapy, in particular for a CNS disorder such as depression or anxiety, are also disclosed.