FIELD: chemistry.
SUBSTANCE: invention relates to novel pyrazine-2-carboxamide derivatives of general
formula 
, where R1 denote a 5- or 6-member ring, having a formula given in claim 1, R2 denotes H or C1-C7-alkyl; R3 denotes phenyl, pyridinyl or pyrimidinyl, possibly substituted with the following substitutes: Cl, F or Br; R4 denotes H, CI, F, Br, CF3 or C1-C7-alkyl; R5 denotes C1-C7-alkyl; as well as pharmaceutically acceptable salts thereof. Disclosed compounds are metabotropic glutamate receptor (mGLUR 5) antagonists. The invention also pertains to a medicinal agent based on disclosed compounds.
EFFECT: improved method.
17 cl, 23 ex
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