(3S,6S)-3-isobutyl-6-isopropylpiperazin-2-one 、
Cyclopropanecarboxylic acid, 2-[4-(1,1-dimethylethyl)phenyl]-, trans- 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to furnish product 311 (60 mg, 65.3% yield) as a white solid的产率得到(3S,6S)-4-((1R,2R)-2-(4-(tert-butyl)phenyl)cyclopropanecarbonyl)-3-isobutyl-6-isopropylpiperazin-2-one