(S)-2-benzoylsulfanyl-5-phthalimidopentanoic acid   、                                                                                      
L-亮氨酰-N,3-二甲基-L-缬氨酰胺                                                                                                                                                                                              以
                                                                                         
乙酸乙酯   、                                                                                         
水                                                                                  为溶剂,
                                                                                                                                                    反应 2.17h,
                                                                                                                以gives a solution of (S)-2-[(S)-2-benzoylsulfanyl-5-(1,3-dioxo-1,3-dihydroisoindol-2-yl)pentanylamino]-4-methylpentanoic acid (2,2-dimethyl-1(S)-methylcarbamoylpropyl)amide which的产率得到(S)-2-[(S)-2-benzoylsulfanyl-5-(1,3-dioxo-1,3-dihydroisoindol-2-yl)pentanylamino]-4-methylpentanoic acid (2,2-dimethyl-1(S)-methylcarbamoylpropyl)amide