(3S,6S)-3,6-diisobutyl-4-((5-phenylisoxazol-3-yl)methyl)piperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-(4-甲氧苯基)异噁唑-3-甲醛 以to give the product 200 (66.8 mg, 35.6% yield) as an yellow solid的产率得到(3S,6S)-3,6-diisobutyl-4-((5-(4-methoxyphenyl)isoxazol-3-yl)methyl)piperazin-2-one