| 摘要 |
PROBLEM TO BE SOLVED: To produce a bromoacetonitrile useful as an intermediate for pharmaceuticals, agrochemicals, etc., accompanying little by-production of polyhalogenated compound by brominating acetonitrile in the presence of hydrogen chloride gas under light irradiation. SOLUTION: Hydrogen chloride gas is blown into a reaction system and thereafter bromine is made to react with acetonitrile under light irradiation. The amount of bromine is preferably 0.01-1 mol, more preferably 0.01-0.40 mol based on 1 mol of acetonitrile. The reaction is carried out preferably in the absence of solvent e.g. by blowing hydrogen chloride gas into an acetonitrile reaction system and dropping bromine into the system under light irradiation. The light is e.g. ultraviolet ray of 3,650-3,690Åwavelength radiated from a 100 W high-pressure mercury lamp. The reaction temperature is preferably 30-80 deg.C, more preferably 65-75 deg.C.
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