Mono- and dihalogenofurfurals in the wittig reaction

The reaction of 3(5)-monohalogeno- and 4,5-dihalogenofurfurals with alkoxycarbonylmethyl-enetriphenylphosphoranes has given esters of - 3(5)-mono- and -4,5-dihalogeno-2-furyl]-acrylic acids, which are converted by alkaline hydrolysis into the corresponding halogen-substituted furylacrylic acids.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 870–872, July, 1973.