(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one 、
(3S,6S)-3-isobutyl-6-isopropylpiperazin-2-one 、
5-(2-噻吩基)-3-异恶唑酸 以to give the product 111 (52.6 mg, 66.7% yield) as a pink oil的产率得到(3S,6S)-3-isobutyl-6-isopropyl-4-(5-(thiophen-2-yl)isoxazole-3-carbonyl)piperazin-2-one