(3S,6S)-3-isobutyl-6-phenylpiperazin-2-one   、                                                                                      
7-fluoro-4,5-dihydronaphtho[2,1-d]isoxazole-3-carboxylic acid   、                                                                                      
( 3S,6S)-3,6-diiso-butyl-4-((1R,2R)-2-phenylcyclopropanecarbonyl)piperazin-2-one                                                                                                                                                                                                                                                                                                          以to furnish 306 (25 mg, 56.4% yield) as a white solid的产率得到(3S,6S)-4-(7-fluoro-4,5-dihydronaphtho[2,1-d]isoxazole-3-carbonyl)-3-isobutyl-6-phenylpiperazin-2-one