(3S,6S)-3-isobutyl-6-phenylpiperazin-2-one 、 (1R,2R)-2-(2,4-difluorophenyl)cyclopropanecarboxylic acid 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to furnish product 327 (35 mg, 39.8% yield) as a white solid的产率得到(3S,6S)-4-[(1R,2R)-2-(2,4-difluoro-phenyl)-cyclopropanecarbonyl]-3-isobutyl-6-phenyl-piperazin-2-one