(3S,6S)-3-((R)-sec-butyl)-6-phenylpiperazin-2-one 、
5-(4-氟苯基)异噁唑-3-羧酸 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish compound 339 (68 mg, 75% yield) as colorless solid的产率得到(3S,6S)-3-((R)-sec-butyl)-4-(5-(4-fluorophenyl)isoxazole-3-carbonyl)-6-phenylpiperazin-2-one