(3S,6S)-3,6-diisobutylpiperazin-2-one 、
3-氯-4-氟溴苄 、
(3S,6S)-4-(4-fluoro-2-(trifluoromethyl)benzyl)-3,6-diisobutylpiperazin-2-one 以furnished the desired product 227 (39 mg, 15.6% yiled) as a white solid的产率得到(3S,6S)-4-(3-chloro-4-fluoro-benzyl)-3,6-diisobutyl-piperazin-2-one