FIELD: chemistry.
SUBSTANCE: invention relates to novel imidazoline derivatives of formula 
(I), where n equals 0 or 1, R1 denotes a saturated branched or straight unsubstituted C1-C4alkyl, saturated unsubstituted C3-C8cycloalkyl or unsubstituted phenyl bonded through a C1-C3alkyl chain, R2 denotes an unsubstituted or halogen atom-monosubstituted phenyl or thiophenyl, or unsubstituted phenyl bonded through a C1-C3alkyl chain, R3 denotes a saturated branched or straight C1-C8alkyl which is not substituted or contains one substitute selected from a group comprising -COO-methyl, thiomethyl or thiobenzyl, or a phenyl which is mono-substituted with a halogen atom and bonded through a C1-C3alkyl chain, R4 denotes a C1-C4alkyl, R5 and R6 independently denote a saturated branched or straight C1-C6alkyl, in form of a racemate, enantiomers, diastereomers, mixture of enantiomers or diastereomers or a separate enantiomer or diastereomer, bases and/or salts with physiologically compatible acids. The invention also relates to a method for synthesis of the compound of formula (I), intermediate compounds of formula B 
, a medicinal agent based on the compound of formula (I) or formula B and use of compounds of formula (I) or formula B to prepare a medicinal agent.
EFFECT: novel derivatives of imidazoline and substituted aldehyde of formula B, having µ-opiate receptor affinity, are obtained.
16 cl, 2 tbl
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