(3S,6S)-3,6-diisobutylpiperazin-2-one 、
3-氨基-3-甲基丁酸 、
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one 以to give the product 272 (98 mg, 83% yield) as a white solid的产率得到(3S,6S)-4-(4-(4-chlorophenyl)thiophene-2-carbonyl)-3,6-diisobutylpiperazin-2-one