| abstract |
This invention involves compounds having structure (I) wherein: a) R1, R2 and R3 are each independently selected from hydrogen; unsubstituted C1-C3 alkanyl, alkenyl or alkynyl; cycloalkanyl, cycloalkenyl; unsubstituted C1-C3 alkylthio or alkoxy; hydroxy; thio; nitro; cyano; amino; C1-C3 alkylamino or C1-C3 dialkylamino and halo; b) R4 is selected from hydrogen; unsubstituted C1-C3 alkanyl; amino, hydroxy, mercapto; C1-C3 alkylthio or alkoxy; C1-C3 alkylamino or C1-C3 dialkylamino and halo; c) R5 is hydrogen; or alkyl or nil; d) where R5 is nil, bond (a) is a double bond; e) the imidazolinylamino moiety is attached to the 5- or 6- position of the benzoxazole ring; and enantiomers, optical isomers, stereoisomers, diastereomers, tautomers, addition salts, biohydrolyzable amides and esters thereof, as well as pharmaceutical compositions comprising such novel compounds. The invention also relates to the use of such compounds for preventing or treating disorders modulated by alpha-2 adrenoceptors. |