methyl (S)-4,4-difluoro-2-isocyanato-5-phenylpentanoate 、
6-azaspiro[2.5]octane trifluoroacetate 在
methyl (S)-2-[(6-azaspiro[2.5]octane-6-carbonyl)amino]-4,4-difluoro-5-phenylpentanoate 、
acetonitrile-water 、
三氟乙酸 作用下,
以gave methyl (S)-2-[(6-azaspiro[2.5]octane-6-carbonyl)amino]-4,4-difluoro-5-phenylpentanoate as a yellow oil的产率得到methyl (S)-2-[(6-azaspiro[2.5]octane-6-carbonyl)amino]-4,4-difluoro-5-phenylpentanoate