FIELD: organic chemistry, medicine, pharmacology.
SUBSTANCE: invention relates to compounds of the formula: 
, wherein variable value Y in ring is not obligatory and represents heteroatom chosen from nitrogen (N), oxygen (O) and sulfur (S) atoms under condition that N atom is trivalent and O or S atoms are bivalent; k means a whole number from 0 to 1; n means a whole number 0, 1 or 2; p means a whole number 0, 1 or 2; X means O or S atom; dotted lines represent a bond or its absence under condition that ring comprises only a single double bond and two adjoining lines are not a bond; R1, R2, R3 and R represent independently hydrogen atom (H), phenyl wherein indicated phenyl group is substituted optionally with one, two or three substitutes represented by (C1-C6)-alkyl, -SO3H, -N3, halogen atom, -CN, -NO2, -NH2, (C1-C6)-alkoxy-, (C1-C6)-thioalkoxy-, (C1-C6)-alkylamino-, (C1-C6)-dialkylamino-group, (C2-C6)-alkynyl, (C2-C6)-alkenyl; 5- or 6-membered heteroaryl comprising from 1 to 3 heteroatoms chosen from O, S and N atoms wherein indicated heteroaryl groups are substituted optionally and independently with one, two or three substitutes represented by (C1-C6)-alkyl, -SO3H, -N3, halogen atom, -CN, -NO2, -NH2, (C1-C6)-alkoxy- (C1-C6)-thioalkoxy-, (C1-C6)-alkylamino-, (C1-C6)-dialkylamino-group, (C2-C6)-alkynyl, (C2-C6)-alkenyl, or indicated groups R1, R2, R3 and R4 represent independently alkyl comprising from 1 to 4 carbon atoms, cycloalkyl comprising from 3 to 5 carbon atoms, -CH2CN, -CH2SR5, -CH2NR6R6, -COR5, -CH2OR5, -OR6, -SR6, -NR6R6, alkenyl comprising from 1 to 4 carbon atoms, alkynyl comprising from 1 to 4 carbon atoms, cycloalkyl comprising from 3 to 6 carbon atoms, fluorine atom, chlorine atom, bromine atom, iodine atom, -CF3 or -CN, oxygen atom bound by a double bond with ring carbon under condition that adjoining dotted line inside of ring means absence of a bond; R5 means H, -OR7, alkyl comprising from 1 to 4 carbon atoms, -CF3, cycloalkyl comprising from 3 to 6 carbon atoms, phenyl, phenyl substituted with one or two alkyl groups comprising from 1 to 4 carbon atoms, fluorine atom, chlorine atom, bromine atom, iodine atom or -CF3, either R5 represents 5- or 6-membered heteroaryl comprising from 1 to 3 heteroatoms chosen from O, S and N atoms, and 5- or 6-membered heteroaryl comprising from 1 to 3 heteroatoms chosen from O, S and N atoms substituted with one or two alkyl groups comprising from 1 to 4 carbon atoms, fluorine atom, chlorine atoms, bromine atom, iodine atom or -CF3; R6 means H, alkyl comprising from 1 to 4 carbon atoms, allyl, cycloalkyl comprising from 3 to 6 carbon atoms, phenyl, phenyl substituted with one or two alkyl groups comprising from 1 to 4 carbon atoms, fluorine atom, chlorine atom, bromine atom, iodine atom or -CF3, either R6 represents 5- or 6-membered heteroaryl comprising from 1 to 3 heteroatoms chosen from O, S and N atoms, either 5- or 6-membered heteroaryl comprising from 1 to 3 heteroatoms chosen from O, S and N atoms substituted with one or two alkyl groups comprising from 1 to 4 carbon atoms, fluorine atom, chlorine atom, bromine atom, iodine atom or -CF3; R7 means H, alkyl comprising from 1 to 4 carbon atoms, allyl, cycloalkyl comprising from 3 to 6 carbon atoms, phenyl, phenyl substituted with one or two alkyl groups comprising from 1 to 4 carbon atoms, fluorine atom, chlorine atom, bromine atom, iodine atom or -CF3; R1 and R2 or R2 and R3, or R3 and R4 can form in common a ring with corresponding carbon atoms to which they are bound; fragments represented by substitutes R1 and R2 or R2 and R3, or R3 and R4 have the following formulae (i): 
, (ii): 
, (iii): 
, (iv): 
or (v): 
- wherein m means a whole number from 0 to 3; R8 represents independently H, alkyl comprising from 1 to 6 carbon atoms, alkenyl comprising from 2 to 6 carbon atoms, alkynyl comprising from 2 to 6 carbon atoms, -SO3H, -N3, -CN, - NO2, F, Cl, Br, J atoms, -CF3, -COR9, -CH2OR9, -OR10, -SR10, (C1-C)-alkylamino- or (C1-C6)-dialkylamino-group wherein R9 means H, alkyl comprising from 1 to 6 carbon atoms, or -OR10 wherein R10 represents independently H or alkyl comprising from 1 to 6 carbon atoms. Also, invention relates to compounds of the formula: 
and 
, and to a method for activation of alpha2B- or alpha2C-adrenergic receptors. Invention provides synthesis of novel biologically active compound possessing activity as agonists of alpha-2B and alpha-2C-adrenergic receptors.
EFFECT: valuable medicinal properties of compounds.
34 cl, 5 tbl, 33 ex
