(3S,6S)-3-Isobutyl-6-propenyl-piperazin-2-one 、
5-(4-氟苯基)-1,2,4-噁二唑-3-羧酸 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish 448 (60 mg, 76.2% yield) as a white solid的产率得到(3S,6S)-4-(5-(4-fluorophenyl)-1,2,4-oxadiazole-3-carbonyl)-3-isobutyl-6-((E)-prop-1-en-1-yl)piperazin-2-one