2-(5-benzyl-1,4,5-trimethyl-3,6-dioxopiperazin-2-ylidenemethyl)-benzonitrile                                                                                                                                                              在
                                                                                                                                         10% palladium on carbon                                                                                                                                                                                                                               
氢气                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                生成                                                 
(S,S)-2-[5-benzyl-1,4,5-trimethyl-3,6-dioxopiperazin-2-ylmethyl]benzonitrile   、                                                                                             2-[5-benzyl-1,4,5-trimethyl-3,6-dioxopiperazin-2-ylmethyl]benzonitrile