(1R)-N-{[4-(2-fluorophenyl)-1-(trifluoroacetyl)piperidin-3-yl]methyl}-1-(1-naphthyl)ethaneamine 、
二碳酸二叔丁酯 在
silica gel 、
ethyl acetate n-hexane 、 tert-butyl {[4-(2-fluorophenyl)-1-(trifluoroacetyl)piperidin-3-yl]methyl}[(1R)-1-(1-naphthyl)ethyl]carbamate 作用下,
以
四氢呋喃 、
三乙胺 为溶剂,
反应 16.0h,
以to obtain 703 mg of tert-butyl {[4-(2-fluorophenyl)-1-(trifluoroacetyl)piperidin-3-yl]methyl}[(1R)-1-(1-naphthyl)ethyl]carbamate (Production Example 6-1, low-polarity fraction, Rf value 0.29 (eluting solvent: hexane/ethyl acetate=7/1)) and tert-butyl {[4-(2-fluorophenyl)-1-(trifluoroacetyl)piperidin-3-yl]methyl}[(1R)-1-(1-naphthyl)ethyl]carbamate 700 mg (Production Example 6-2, high-polarity fraction, Rf value 0.21 (eluting solvent: hexane/ethyl acetate=7/1)) as a colorless foamy substance的产率得到tert-butyl {[4-(2-fluorophenyl)-1-(trifluoroacetyl)piperidin-3-yl]methyl}[(1R)-1-(1-naphthyl)ethyl]carbamate