(3S,6S)-3,6-diisobutylpiperazin-2-one 、
Cyclopropanecarboxylic acid, 2-[4-(1,1-dimethylethyl)phenyl]-, trans- 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish product 249 (60 mg, 73.5% yield) as a white solid的产率得到(3S,6S)-4-[(1R,2R)-2-(4-tert-butyl-phenyl)-cyclopropanecarbonyl]-3,6-diisobutyl-piperazin-2-one