A process is described for the preparation of 4-Methyl-5-(2-Chloroalkyl)-thiazole wherein the alkyl ranges from C.sub.2 -C.sub.5, by providing the steps of either a) converting the 3-thiocyanato-5-chloro-2-alkanone into 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole by gaseous hydrochloric acid in an organic solvent and hydrogenating the compound in the presence of a metal catalyst in an organic solvent, or b) reacting 3-thiocyanato-5-choro-2-alkanone with aqueous mineral acid and treating the thiazole obtained with a halogenating agent, and hydrogenating the 2-chloro-4-methyl-5-(2-chloroalkyl)-thiazole in an organic solvent in presence of a metal catalyst.
一种制备4-甲基-5-(2-
氯烷基)-
噻唑的方法,其中烷基范围为C.sub.2-C.sub.5,包括以下步骤:a) 在有机溶剂中通过气态
盐酸将3-
硫氰酸-5-
氯-2-酮转化为2-
氯-4-甲基-5-(2-
氯烷基)-
噻唑,并在有机溶剂中在
金属催化剂的存在下对该化合物进行氢化;或者b) 将3-
硫氰酸-5-
氯-2-酮与
水溶矿酸反应,并用卤代试剂处理所得的
噻唑,然后在有机溶剂中在
金属催化剂的存在下对2-
氯-4-甲基-5-(2-
氯烷基)-
噻唑进行氢化。