(3S,6S)-3,6-diisobutyl-4-((5-phenylisoxazol-3-yl)methyl)piperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-(4-氯苯基)异噁唑-3-甲醛 以to give the product 197 (19.4 mg, 10.2% yield) as a white solid的产率得到(3S,6S)-4-((5-(4-chlorophenyl)isoxazol-3-yl)methyl)-3,6-diisobutylpiperazin-2-one