(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3-isobutyl-6-phenylpiperazin-2-one 、
4-fluoro-5-(4-fluorophenyl)isoxazole-3-carboxylic acid 以to give the product 376 (63.8 mg, 66% yield) as a colorless solid的产率得到(3S,6S)-4-(4-fluoro-5-(4-fluorophenyl)isoxazole-3-carbonyl)-3-isobutyl-6-phenyl-piperazin-2-one