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