PURPOSE: To obtain subject compound in high purity and yield by blowing chlorine gas into a mercaptan or disulfidely using, inorganic acid and/or organic acid as an acid solvent followed by blowing air into the system for a specified time.
CONSTITUTION: Using an organic or inorganic acid or their mixture as an acid solvent instead of using water as reaction solvent, chlorine gas is blown into a mercaptan or disulfide as shown in the reaction formulas (R is an alkyl) followed by blowing air into the system for a specified time, thus obtaining the objective alkanesulfonyl chloride with neary no production of main chain- chlorinated products as byproducts. In this method, as the alkane, a 2-4C compound is esp. pref. By this method, the objective compound can be safely obtained by a simple operation by blowing chlorine gas followed by air to advance homogeneous chlorination reaction. The alkanesulfonyl chloride is useful as an intermediate for medicines and agrochemicals.
TANAKA HIROAKI
MITSUI JUN
ODA RYOZO
