(3S,6S)-3,6-diisobutylpiperazin-2-one 、
2-氯-5-(三氟甲基)溴苄 、
(3S,6S)-4-(4-fluoro-2-(trifluoromethyl)benzyl)-3,6-diisobutylpiperazin-2-one 以furnished the desired product 229 (60 mg, 15.78% yield) as a white solid的产率得到(3S,6S)-4-(2-chloro-5-trifluoromethyl-benzyl)-3,6-diisobutyl-piperazin-2-one