(3S,6S)-4-(5-(3,4-difluorophenyl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one 、
(3S,6S)-3,6-diisobutylpiperazin-2-one 、 Ethyl 5-(3-Chloro-4-fluorophenyl)isoxazole-3-carboxylate 以to give the product 141 (107.1 mg, 52.3% yield) as a white solid的产率得到(3S,6S)-4-(5-(3-chloro-4-fluorophenyl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one