N-乙基甲基胺   、                                                                                      
((2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-1-{[(1,1-dimethylethyl)oxy]carbonyl}-2-pyrrolidinyl)methyl 1H-imidazole-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 Brine   、                                                                                                  crude material                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯   、                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 60.0h,
                                                                                                                以to give 1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[ethyl (methyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate as a crude material (303.2 mg, 75% purity by LC/MS)的产率得到1,1-dimethylethyl (2R,4R)-4-{[(2,5-dibromophenyl)sulfonyl]amino}-2-[({[ethyl(methyl)amino]carbonyl}oxy)methyl]-1-pyrrolidinecarboxylate