(3S,6S)-3-isobutyl-6-isopropylpiperazin-2-one 、
(1R,2S)-rel-2-(3,4-二氟苯基)环丙基甲酸 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to furnish product 309 (36 mg, 84.9% yield) as a white solid的产率得到(3S,6S)-4-[(1R,2R)-2-(3,4-difluoro-phenyl)-cyclopropanecarbonyl]-3-isobutyl-6-isopropyl-piperazin-2-one