(3S,6S)-3-isobutyl-6-phenylpiperazin-2-one 、
(1R,2R)-2-(4-chlorophenyl)cyclopropane-1-carboxylic acid 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish product 248 (64 mg, 78.7% yield) as a white solid的产率得到(3S,6S)-4-[(1R,2R)-2-(4-chloro-phenyl)-cyclopropanecarbonyl]-3-isobutyl-6-phenyl-piperazin-2-one