BENZENE DERIVATIVES Russian patent published in 1999 - IPC

FIELD: organic chemistry. SUBSTANCE: invention relates to compounds of the formula (I) where R¹ - hydrogen, hydroxyl, C_1-9-acyloxy-group or lower alkoxyl; R₂ and R₃ - H, halogen, lower alkyl, alkoxyl; R₄ - H or lower alkyl; A - fragment of the formula (II) where R₅ - H, alkyl, alkoxyl, phenyl, pyrrolidine, 5-membered ring containing two oxygen atoms and where carbon atom to which is bound is spiro-atom; or this fragment is a compound of the formulas (III) , (IV) where R₆ and R₇ - H, alkyl, aryl or heterocyclic group; n = 2, 3, 4, 5 or 6, or their possible stereoisomers or optical isomers, or their pharmaceutically acceptable salts. Compounds of the formula (I) show inhibitory effect on calcium overloading in addition to their vasodilator activity and inhibitory effect on lipid peroxidation and can be used as benefit or curative agents for treatment of patients with ischemia and hypertension. EFFECT: improved method of synthesis, enhanced effectiveness of compounds. 31 cl, 37 tbl, 75 ex