The title compounds were prepared by the reaction of 5-nitrofurfuryl bromide with heterocyclic thiols of the type R I_SH where RI is 2-benzimidazolyl, 2-benzthiazolyl, 2- benzoxazolyl, 2-benzselenazolyl, 2-pyrimidinyl or 2-(4-phenyl-l, 3, 4-thiadiazole-5-thion)-yl. Oxidation of the benzthiazole and pyrimidine derivatives with hydrogen peroxide in acetic acid afforded the corresponding sulphones. 5-Nitrofurfuryl furyl and thienyl suI phones ...