(3S,6S)-3-isobutyl-6-thiophen-3-yl-piperazin-2-one   、                                                                                      
3-(4-氟苯基)-1,2-恶唑-5-羧酸   、                                                                                      
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one                                                                                                                                                                                                                                                                                                          以to furnish product 450 (8 mg, 18.6% yield) as a white solid的产率得到(3S,6S)-4-(3-(4-fluorophenyl)isoxazole-5-carbonyl)-3-isobutyl-6-(thiophen-3-yl)piperazin-2-one