(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
3,5-二氟丁二酸 以to give the product 95 (58.5 mg, yield: 32.9%) as a colorless oil的产率得到(3S,6S)-4-((E)-3-(3,5-difluorophenyl)acryloyl)-3,6-diisobutylpiperazin-2-one