(1R)-1-(1-naphthyl)-N-{[3-phenyl-1-(trifluoroacetyl)piperidin-4-yl]methyl}ethanamine 、
三乙胺 、
二碳酸二叔丁酯 在
silica gel 、
ethyl acetate n-hexane 、 tert-butyl 作用下,
以
四氢呋喃 为溶剂,
反应 16.0h,
以to obtain two diastereomers of 1.21 g of a low-polarity fraction of tert-butyl[(1R)-1-(1-naphthyl)ethyl] {[3-phenyl-1-(trifluoroacetyl)piperidin-4-yl]methyl}carbamate (Production Example 18-1, Rf value 0.57 (hexane/ethyl acetate=7/1)) and 1.20 g of a high-polarity fraction of tert-butyl的产率得到tert-butyl[(1R)-1-(1-naphthyl)ethyl] {[3-phenyl-1-(trifluoroacetyl)piperidin-4-yl]methyl}carbamate