METHOD FOR PREPARING BIS-BENZAZOLYL COMPOUNDS Russian patent published in 2007 - IPC C07D417/10 C07D413/10 C07D413/14 C07D403/10 C07D405/14 

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to a method for synthesis of compound of the formula (1): wherein Y means -O-, -S- or -N(R₂)- wherein R₂ means hydrogen atom, (C₁-C₁₀)-alkyl or aralkyl; Z means 2,5-furanyl, 2,5-thiophenyl, 4,4'-stilbenyl or 1,2-ethyleneyl residue; R₁ means hydrogen or halogen atom, (C₁-C₁₀)-alkyl, (C₁-C₁₀)-alkoxy-group, cyano-group, -COOM or -SO₃M wherein M means hydrogen atom or alkaline or alkaline-earth metal atom. Method for synthesis involves carrying out the reaction of compound of the formula (2): with dicarboxylic acid of the formula: HOOC-Z-COOH (3) or with it ester wherein Y, Z and R₁ have values given above in N-methylpyrrolidone or N,N-dimethylacetamide medium in the presence of an acid catalyst and optionally in the presence of an accessory solvent able to remove water from the reaction mixture.

EFFECT: improved method of synthesis.

11 cl, 7 ex