PREPARATION OF 1,1-BIS(METHYLTHIO)-2-NITROETHYLENE

PURPOSE:To obtain the titled compound useful as a raw material of agricultural chemicals and pharmaceuticals, economically in an industrial scale, in high yield, by using 1,1-dihalo-2-nitroethylene and methyl mercaptan as raw materials, and reacting the materials in a heterogeneous solvent in the presence of a base. CONSTITUTION:1mol of a 1,1-dihalo-2-nitroethylene of formula (X and X are halogen) obtained easily bt the reaction of 1,1-dihaloethylene with a nitrile compound, especially preferably 1,1-dichloro-2-nitroethylene, etc. is made to react with 1-10mol of methyl mercaptan in a heterogeneous solvent such as CCl4 in the presence of a base such as NaOH at