(3S,6S)-3,6-diisobutylpiperazin-2-one 、
4-三氟甲氧基溴苄 、
(3S,6S)-4-(4-fluoro-2-(trifluoromethyl)benzyl)-3,6-diisobutylpiperazin-2-one 以furnished the desired product 228 (77 mg, 28.2% yiled) as a white solid的产率得到(3S,6S)-3,6-diisobutyl-4-(4-trifluoromethoxy-benzyl)-piperazin-2-one