(3S,6S)-4-(5-(3,4-difluorophenyl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-(3-甲氧基-苯基)-异噁唑-3-羧酸 以to give the product 130 (67 mg, 34.5% yield) as a pale yellow solid的产率得到(3S,6S)-3,6-diisobutyl-4-(5-(3-methoxyphenyl)isoxazole-3-carbonyl)piperazin-2-one