(3S,6S)-6-cyclohexyl-3-isobutylpiperazin-2-one 、 5-(4-Chloro-3-fluorophenyl)isoxazole-3-carboxylic acid 、
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one 以to furnish 159 (30 mg, 32.2% yield) as a white solid的产率得到(3S,6S)-4-[5-(4-chloro-3-fluoro-phenyl)-isoxazole-3-carbonyl]-6-cyclohexyl-3-isobutyl-piperazin-2-one