(3S,6S)-4-(5-(3,4-difluorophenyl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-(3-氟苯基)-异恶唑-3-羧酸 以to give the product 128 (108 mg, 57.2% yield) as a white foam的产率得到(3S,6S)-4-(5-(3-fluorophenyl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one