Imperial Chemical Industries Limited

Brian S Tait

Philip N Edwards

Graham C Crawley

Derek W Young

William R Pilgrim

George B Hill

Jean Bowler

Francis Thomas Boyle

Michael S Large

Alasdair T Glen

Zbigniew S Matusiak

Phenol derivatives

A heterocyclic compound of the formula I, as shown hereafter in these claims in which n is 0 or 1; A is a 1-4C alkylene radical which may optionally bear one or more 1-4C alkyl substituents; R.sup.1 and R.sup.2, which may be the same or different, are each a hydrogen or halogen atom, an amino, carbamoyl, cyano, hydroxy, nitro or sulphamoyl radical, a 1-6C alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylamino, alkylcarbamoyl or alkylsulphamoyl radical, a di(1-6C alkyl)-amino, di(1-6C alkyl)carbamoyl or di(1-6C alkyl)sulphamoyl radical, or a 2-7C alkoxycarbonyl radical; m is an integer of 1 to 5, R.sup.3 is a hydrogen or halogen atom or a 1-6C alkyl or halogenoalkyl radical; and R.sup.4 is a 5-membered aromatic ring heterocyclyl radical containing 2 or 3 nitrogen atoms, or a 6-membered aromatic ring heterocyclyl radical containing 1 or 2 nitrogen atoms, which heterocyclyl radical may bear a 1-6C alkyl substituent; and for those compounds which contain a basic nitrogen atom, the pharmaceutically acceptable acid addition salts thereof together with processes of manufacture and pharmaceutical and veterinary compositions thereof.

Heterocyclic compounds

Mono- or bis-complex esters or ethers of a phenol derivative of the formula

Ether and ester derivatives of phenols

Steroid derivatives

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MacClesfield, United Kingdom

Brian S Tait