| 摘要 |
A process for the preparation of 2-chloro-5-chloromethyl-1,3-thiazole, in which allyl isothio-cyanate of formula CH2=CH-CH2-NCS is reacted at from -40.degree.C to +30.degree.C, i n a solvent that is inert under the reaction conditions, with from 1 to 2 mol of a chlorinating agent per mol of allyl isothiocyanate; to the reaction mixture so obtained there is added, at a reaction temp-erature of from 0.degree.C to the boiling temperature of the solvent used, from 1 to 5 mol of oxidis-ing agent per mol of allyl isothiocyanate, and then 2-chloro-5- chloromethyl-1,3-thiazole is isolated from the reaction mixture and is optionally converted by crystallisation into high--purity 2-chloro-5-chloromethyl-1,3-thiazole.
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