(3S,6S)-6-(cyclopropylmethyl)-3-isobutylpiperazin-2-one   、                                                                                      
(1R,2R)-2-(4-chlorophenyl)cyclopropane-1-carboxylic acid   、                                                                                      
(3S,6S)-4-cinnamoyl-3,6-diisobutylpiperazin-2-one                                                                                                                                                                                                                                                                                                          以to furnish product 243 (72 mg, 82.2% yield) as a white solid的产率得到(3S,6S)-4-[(1R,2R)-2-(4-chloro-phenyl)-cyclopropanecarbonyl]-6-cyclopropylmethyl-3-isobutyl-piperazin-2-one