PYROCATECHOLE DERIVATIVES AND THEIR PHARMACEUTICAL COMPOSITIONS

摘要

The use of substd. catechol derivs. of formula (Ia), their physiologically hydrolysable esters and ethers, and pharmaceutically acceptable salts as therapeutic agents is new. Ra = NO2 or CN; Rb = H or halo; Rc = halo, NO2, CN, -(A)n-(Q)m-R1 or -(A)n-Q-R2; A = vinylene, opt. substd. by lower alkyl; n and m = zero or 1; R1 = COR3, aromatic carbocyclic gp. or, bonded via a C atom, an aromatic or partially unsatd. heterocycle; R2 = H or lower hydrocarbyl, opt. substd., satd. or partially unsatd.; R3 = OH; NH2; lower hydrocarbyl (opt. substd., satd. or partially unsatd.) bonded via O, imino or lower alkylimino; or an N-bound, satd. N-contg. heterocyclyl; Q = CO or C=N-(Z)p-R4; Z = O or imino; P = zero or 1; R4 = H or a satd. or partially unsatd. lower hydrocarbyl, opt. substd. and opt. bound via carbonyl gp. (Ia) are new cpds. when R = NO2, CN, -(A)n-(Q)m-R1 or -(A)n-Q-R21; R21 is as R2, excluding H; provisos: Ra = CN if Rc = CN or NO2; R3 is other than OH when m = zero.