This paper concerns the synthesis of compounds of furylethylene type with three and four substituents at the ethylene bond, which are derivatives and structural analogues of 3-(2-furyl)-2-propenoic acid, and their physicochemical and biological properties. The starting material for synthesis of derivatives of 3-X-methyl-3-(2-furyI} - propenoic acid was 3-bromomethyl-3-(2-furyl)-2-propenoic acid and its esters pre- pared by bromination of alkyl 3-methyl-3-(2-furyl)-2-propenoate ...