tert-butyl 4-(4-fluorophenyl)-4-(hydroxymethyl)piperidine-1-carboxylate 、
(+/-)-1-(1-ethyl-6-(trifluoromethyl)-1H-benzo[d]imidazol-4-yl)ethyl 2,2,2-trichloroacetimidate 在
tetrafluoroboric acid diethyletherate 作用下,
以
1,1-二氯乙烷 、
环己烷 为溶剂,
以30.7%的产率得到tert-butyl 4-((1-(1-ethyl-6-(trifluoromethyl)-1H-benzo[d]imidazol-4-yl)ethoxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate