tert-butyl 3-fluoro-4-(4-(4-fluoro-3-(trifluoromethyl)phenyl)-1-(2-((tetrahydro-2H-pyran-2-yl)oxy)ethyl)-1H-imidazol-2-yl)piperidine-1-carboxylate 、
对甲苯磺酸一水合物 在
乙酸乙酯 、
氯化铵 、 Brine 、
magnesium sulfate 作用下,
以
甲醇 为溶剂,
反应 1.5h,
以to yield cis-3-fluoro-4-[4-(4-fluoro-3-trifluoromethyl-phenyl)-1-(2-hydroxy-ethyl)-1H-imidazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester (440 mg, 31% yield) as the first fraction and trans-3-Fluoro-4-[4-(4-fluoro-3-trifluoromethyl-phenyl)-1-(2-hydroxy-ethyl)-1H-imidazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester (490 mg, 34% yield) as the second fraction的产率得到cis-3-fluoro-4-[4-(4-fluoro-3-trifluoromethyl-phenyl)-1-(2-hydroxy-ethyl)-1H-imidazol-2-yl]-piperidine-1-carboxylic acid tert-butyl ester