BENZIMIDAZOLE DERIVATIVES SHOWING ANTIHISTAMINE ACTIVITY Russian patent published in 1994 - IPC

FIELD: organic chemistry. SUBSTANCE: product - derivatives of benzimidazole of the formula (I) (image) where R₁ and R₂ are similar or different and mean H, halogen, lower alkyl, hydroxy-, alkoxy-, carbalkoxy-group, non- or substituted aryl; n = 0-1; m = 2-4; X, Y, Z and W are similar or different and also form part of other aromatic or nonaromatic ring and mean nitrogen or carbon bound with halogen or with such radical as alkyl, aryl, carboxyalkyl, carboalkoxy-, sulfo- or alkylsulfo-group. Synthesized compounds are used in medicine. EFFECT: improved method of synthesis. 4 tbl