The invention discloses a preparation method of
imidazole ethanol in the technical field of
medicine production, which comprises the following steps: adding a
sodium hydroxide aqueous solution,
tetrabutylammonium bromide and cis-
benzoic acid-[2-bromomethyl-2-(2, 4-dichlorophenyl)-1, 3-
dioxolane-4-yl] methyl ester into a reaction device, and carrying out
hydrolysis reaction to obtain (2-(bromomethyl)-2-(2, 4-dichlorophenyl)-1, 3-
dioxolane-4-yl) methyl ester; 2, 3-
dioxolane-4-yl)
methanol is used as a
raw material; further mixing with
hydrochloric acid for
hydrolysis reaction to obtain 2, 2 ', 4'-trichloroacetophenone; according to the method, (S)-2-chloro-1-(2, 4-dichlorophenyl)
ethanol is taken as a
raw material,
potassium borohydride and
methanol are added, (S)-2-chloro-1-(2, 4-dichlorophenyl)
ethanol is obtained through a reduction reaction, (S)-2-chloro-1-(2, 4-dichlorophenyl) ethanol and
imidazole are subjected to a
condensation reaction to obtain
imidazole ethanol, impurities in the
ketoconazole production process are taken as raw materials, the production cost is reduced, and the product is finally easy to separate and purify; the product can be used for further preparing
antifungal drugs such as econazole, oconazole, tioconazole,
miconazole nitrate and the like.