(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-环丙基异噁唑-3-羧酸 以to give the product 106 (122.2 mg, 74.8% yield) as a yellow oil的产率得到(3S,6S)-4-(5-cyclopropylisoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one