Ethanolamine derivatives

A compound of formula (I). ##STR26## wherein Ar represents a phenyl group optionally substituted by one or more substituents selected from halogen atoms, or the groups C.sub.1-6 alkyl, nitro, --(CH.sub.2).sub.q R, [where R is hydroxy, C.sub.1-6 alkoxy, --NR.sup.3 R.sup.4 (where R.sup.3 and R.sup.4 each represents a hydrogen atom, or a C.sub.1-4 alkyl group, or --NR.sup.3 R.sup.4 forms a saturated heterocyclic amino group which has 5-7 ring members and optionally contains in the ring one or more atoms selected from --O-- or --S-- or a group --NH-- or --N(CH.sub.3)--), --NR.sup.5 COR.sup.6 (where R.sup.5 represents a hydrogen atom or a C.sub.1-4 alkyl group, and R.sup.6 represents a hydrogen atom or a C.sub.1-4 alkyl, C.sub.1-4 alkoxy, phenyl or --NR.sup.3 R.sup.4 group), --NR.sup.5 SO.sub.2 R.sup.7 (where R.sup.7 represents a C.sub.1-4 alkyl, phenyl or --NR.sup.3 R.sup.4 group), -- COR.sup.8 (where R.sup.8 represents hydroxy, C.sub.1-4 alkoxy or --NR.sup.3 R.sup.4), --SR.sup.9 (where R.sup.9 is a hydrogen atom, or a C.sub.1-4 alkyl or phenyl group), --SOR.sup.9, --SO.sub.2 R.sup.9, or --CN, and q represents an integer from 0 to 3], or --O(CH.sub.2).sub.t R.sup.10 [where R.sup.10 represents a hydroxy or C.sub.1--4 alkoxy group, and t is an integer 2 or 3], or Ar is a phenyl group substituted by an alkylenedioxy group of formula --O(CH.sub.2).sub.p O--, where p represents an integer 1 or 2;

• R.sup.1 and R.sup.2 each represents a hydrogen atom or a C.sub.1-3 alkyl group with the proviso that the sum total of carbon atoms in R.sup.1 and R.sup.2 is not more than 4;
• X represents a bond or a C.sub.1-7 alkylene, C.sub.2-7 alkenylene or C.sub.2-7 alkynylene chain and
• Y represents a bond or a C.sub.1-6 alkylene, C.sub.2-6 alkenylene or C.sub.2-6 alkynylene chain with the proviso that the sum total of carbon atoms in X and Y is 2-10;
• Q represents the group ##STR27## [where Q.sup.1 represents the group --CH.sub.2 R.sup.23 (where R.sup.23 represents C.sub.1-3 alkoxy, methanesulphonyl or cyano), or the group --CH.sub.2 NHR.sup.11 (where R.sup.11 represents R.sup.12 CO--, R.sup.12 NHCO--, R.sup.12 R.sup.13 NSO.sub.2 -- or R.sup.14 SO.sub.2 --, where R.sup.12 and R.sup.13 each represent a hydrogen atom or a C.sub.1-3 alkyl group, and R.sup.14 represents a C.sub.1-3 alkyl group), or the group --NR.sup.15 R.sup.16 (where R.sup.15 represents a hydrogen atom or a C.sub.1-4 alkyl group, and R.sup.16 represents a hydrogen atom or a C.sub.1-4 alkyl group or, when R.sup.15 is a hydrogen atom, R.sup.16 also represents a C.sub.1-4 alkoxycarbonyl group)], or Q represents the group ##STR28## or Q represents a phenyl group substituted by a hydroxy group and optionally also by a halogen atom;
• or a physiologically acceptable salt or solvate thereof.