3-{[dimethyl(oxo)-λ6-sulfanylidene]amino}benzoic acid   、                                                                                      tert-butyl 6-{[(2S)-2-amino-2-(trans-4-methylcyclohexyl)acetyl]amino}-4-fluorospiro[indoline-3,4'-tetrahydropyran]-1-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
三乙胺   、                                                                                                  N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以80%的产率得到tert-butyl 6-{[(2S)-2-[(3-{[dimethyl(oxo)-λ
6-sulfanylidene]amino}benzoyl)amino]-2-(trans-4-methylcyclohexyl)acetyl]amino}-4-fluorospiro[indoline-3,4'-tetrahydropyran]-1-carboxylate