(3S,6S)-6-cyclopentyl-3-isobutylpiperazin-2-one 、 (1R,2R)-2-(2,4-difluorophenyl)cyclopropanecarboxylic acid 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish product 325 (25 mg, 30.8% yield) as a white solid的产率得到(3S,6S)-6-cyclopentyl-4-((1R,2R)-2-(2,4-difluorophenyl)cyclopropanecarbonyl)-3-isobutylpiperazin-2-one