PURPOSE:To prepare the titled compound useful as a synthetic intermediate of an aminopyrimidine compound which is useful as agricultural chemicals such as insecticide, miticide, etc., by contacting and reacting 4-hydroxy-6-alkylpyrimidine directly with halogen. CONSTITUTION:4-Hydroxy-6-alkylpyrimidine is made to contact with a halogen in a solvent such as acetic acid at 40-70 deg.C, preferably at a molar ratio of 1:(1- 2) to obtain the objective 4-hydroxy-5-halogeno-6-alkyl-pyrimidine hydrogen halide. The liquid left after separating the objective compound can be recycled and reused. Since the objective compound can be obtained in the form of a hydrogen halide salt, it can be separated extremely easily, and used conveniently for the reaction with phosphorus oxychloride. EFFECT:High yield and selectivity.
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