(3R,6S)-6-phenyl-3-thiophen-2-yl-piperazin-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 471 (45 mg, 50% yield) as a white solid的产率得到(3R,6S)-4-(5-(4-fluorophenyl)isoxazole-3-carbonyl)-6-phenyl-3-(thiophen-2-yl)piperazin-2-one