ampicillin sulfone   、                                                                                      alkaline earth salt of/the/ methylsulfuric acid                                                                                                                                                              在
                                                                                                                                                                                 borate buffer                                                                                                                                  作用下,
                                                                                                                                                                                        反应 1.0h,
                                                                                                                以100%的产率得到(2S,5R,6R)-3,3-Dimethyl-4,4,7-trioxo-6-[(R)-2-(5-{2-oxo-7-[5-((3aR,6S,6aS)-2-oxo-hexahydro-thieno[3,4-d]imidazol-6-yl)-pentanoylamino]-heptylamino}-pentanoylamino)-2-phenyl-acetylamino]-4λ
6-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid