PURPOSE: Water is used as a solvent to obtain an alkali metal salt of dithiocarbamic acid under specific conditions and the product is made to react with an inorganic alkali, thus permitting the reaction in an aqueous medium and producing the titled compound with no formation of an amine salt as a by- product in high yield on an industrial scale.
CONSTITUTION: Water is used as a solvent and carbon disulfide and a phase- transfer catalyst such as 90% aqueous solution of tri-n-octylamine-methyl chloride are added to a compound of formulaI(R is 1W6C alkyl; n is 1W6) or its hydrochloride by 0.5mol%. Then an inorganic alkali is added to give a compound of formula II (M is alkali metal). Then, a water-insoluble organic solvent is added or not added, and an alkyl chlorocarbonate is added to give a compound of formula III. The product is decomposed by a customary method to give the objective compound of formula IV. The process according to the present invention uses inexpensive inorganic alkali and needs no recovery of amine salt. The compound of formula II is advantageously stable and easy to handle.
MITSUI JIYUN
OONISHI HIROHISA
