(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one   、                                                                                      
(3S,6S)-3,6-diisobutylpiperazin-2-one   、                                                                                      
5-(5-chlorothiophen-2-yl)-1,2-oxazole-3-carboxylic acid                                                                                                                                                                                                                                                                                                          以to give the product 112 (89.5 mg, 44.9% yield) as an oil的产率得到(3S,6S)-4-(5-(5-chlorothiophen-2-yl)isoxazole-3-carbonyl)-3,6-diisobutylpiperazin-2-one