methyl (2S)-2-({[1-(diphenylmethyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-3-(1-trityl-1H-imidazol-4-yl)propanoate   、                                                                                      
sodium hydroxide                                                                                                                                                                                              以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以to provide 450 mg (2S)-2-({[1-(diphenylmethyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-3-(1-trityl-1H-imidazol-4-yl)propanoic acid的产率得到(2S)-2-({[1-(diphenylmethyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-3-(1-trityl-1H-imidazol-4-yl)propanoic acid