(3S,6S)-3,6-diisobutyl-4-((5-phenylisoxazol-3-yl)methyl)piperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、
5-(2-噻吩基)-3-异噁唑甲醛 以to give the product 202 (38 mg, 21.5% yield) as a white solid的产率得到(3S,6S)-3,6-diisobutyl-4-((5-(thiophen-2-yl)isoxazol-3-yl)methyl)piperazin-2-one