AROMATIC 2-AMINO-IMIDAZOLE DERIVATIVES AS ALPHA-2A ADRENOCEPTOR AGONISTS

摘要

Compounds of formula (I) which are alpha 2A selective agonists and methods of selectively stimulating alpha 2A adrenoceptors for therapeutic effect in a mammal by administration of compounds of formula (I) wherein R1 is alkyl or alkenyl of 1 to 4 carbons, cyclopropyl, Cl, Br, I, -OR4, -SR4, -NR4R4 or -Si(R4)3 wherein R4 represents alkyl or alkenyl of 1 to 4 carbon atoms or is hydrogen, R2 and R3 are selected from the group consisting of R1 and hydrogen; or R1 and R2 taken together from a fused ring with the phenyl moiety and are selected from the group consisting of -(CH2)4-, -NH(CH2)2NH-, -O(CH2)2O-, -NH(CH2)2O-, -S(CH2)2S-, -NH(CH2)S-, and -O(CH2)2S- and R3 is selected from the group consisting of R1 and hydrogen; or R2 and R3 taken together form a fused ring with the phenyl moiety and are selected from the group consisting of -(CH2)4-, -NH(CH2)2NH-, -O(CH2)2O-, -NH(CH2)2O-, -S(CH2)2S-, -NH(CH2)S-, and -O(CH2)2S-, -CH=CH-CH=CH-, -N=CH-CH=N- and -N=CH-N=CH-, or pharmaceutically acceptable salts thereof. The therapeutic methods find use in treating conditions responsive to alpha 2A agonist treatment in such uses as a reduction or maintenance of intraocular pressure in at least one eye; treatment of peripheral pain; augmentation of the effects of anesthetics; treatment of hypertension; treatment of hyperglycemia; and sedation.