(3S,6S)-3,6-diisobutyl-4-(4-phenoxybenzoyl)piperazin-2-one   、                                                                                      
(3S,6S)-3,6-diisobutylpiperazin-2-one   、                                                                                      
5-(2-噻吩基)-3-异恶唑酸                                                                                                                                                                                                                                                                                                          以to give the product 109 (94.8 mg, 51.8% yield) as an yellow oil的产率得到(3S,6S)-3,6-diisobutyl-4-(5-(thiophen-2-yl)isoxazole-3-carbonyl)piperazin-2-one