(2S)-2-{(2-chloroacetyl)[(1R)-1-(4-trifluoromethylphenyl)ethyl]amino}-3-methylbutyric acid methyl ester 、
1-Boc-4-氨基哌啶 在
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
以48%的产率得到4-{3-isopropyl-2,5-dioxo-4-[1-(4-trifluoromethylphenyl)ethyl]piperazin-1-yl}piperidine-1-carboxylic acid tert-butyl ester