The halide of the formula (II) (i.e. A is a halogen atom such as chlorine or bromine) is readily obtained by the reaction of the alcohol of the formula (II) with a halogenating agent (e.g. phosphorus oxychloride, phosphorus trichloride, phosphorus tribromide, hydrochloric acid, hydrobromic acid, thionyl chloride) (an analogous reaction is shown in Beil. 21, 476).