(1R,2S)-ethyl 1-((2S,4R)-1-((S)-2-(tert-butoxycarbonylamino)pent-4-enoyl)-4-hydroxypyrrolidine-2-carboxamido)-2-(2,2-difluorohex-5-enyl)cyclopropanecarboxylate   、                                                                                      
2-巯基烟酸   、                                                                                      
碳酸氢钠   、                                                                                      
水                                                                                                                                                              在
                                                                                                                                         catalyst                                                                                                                                                                                                                               
氮   、                                                                                                  
magnesium sulfate   、                                                                                                  silica gel   、                                                                                                  
methanol-dichloromethane                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,1-二氯乙烷                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以to provide (2R,6S,13aS,14aR,16aS,E)-ethyl 6-(tert-butoxycarbonylamino)-12,12-difluoro-2-hydroxy-5,16-dioxo-1,2,3,5,6,7,10,11,12,13,13a,14,14a,15,16,16a-hexadecahydrocyclopropa[e]pyrrolo[1,2-a][1,4]diazacyclopentadecine-14a-carboxylate (0.94 g, 1.775 mmol, 50.8% yield) as a white solid的产率得到(2R,6S,13aS,14aR,16aS,E)-ethyl 6-(tert-butoxycarbonylamino)-12,12-difluoro-2-hydroxy-5,16-dioxo-1,2,3,5,6,7,10,11,12,13,13a,14,14a,15,16,16a-hexadecahydrocyclopropa[e]pyrrolo[1,2-a][1,4]diazacyclopentadecine-14a-carboxylate