(3-Chlorocarbonyl-2-oxo-imidazolidin-1-yl)-phosphonic acid diisopropyl ester   、                                                                                      6-[(2-Amino-2-phenyl-acetylamino)-methyl]-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide   、                                                                                                  
三乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                                                        生成                                                 6-[(2-{[3-(Diisopropoxy-phosphoryl)-2-oxo-imidazolidine-1-carbonyl]-amino}-2-phenyl-acetylamino)-methyl]-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid