反应详情

Benzhydryl 1-(((Z)-(1-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)-2-(((2R,3S)-2-((4-(((methylsulfonyl)oxy)methyl)-2H-1,2,3-triazol-2-yl)methyl)-4-oxoazetidin-3-yl)amino)-2-oxoethylidene)amino)oxy)cyclopropanecarboxylate (64 mg, 0.081 mmol) and sodium iodide (18.1 mg, 0.121 mmol) were stirred in DMF (700 μL) for 14 h, whereupon cesium carbonate (33.4 mg, 0.103 mmol) and tert-butyl piperidin-4-ylcarbamate (17.7 mg, 0.089 mmol) were added. After 3 h of additional stirring the mixture was diluted with EtOAc and LiCl (5% aq) solution. The aqueous layer was extracted with EtOAc (2×) and the combined organic layers were washed with LiCl (5% aq) solution, brine, dried over Na2SO4 and concentrated in vacuo. The crude residue was purified via silica gel chromatography (1-8% MeOH-DCM), affording the title compound (52.6 mg, 73%) as an off-white solid. LCMS: Rt=0.98 min, m/z=899.7 (M+1) Method 2m_acidic.

1. additionwere added
2. extractionThe aqueous layer was extracted with EtOAc (2×)
3. washthe combined organic layers were washed with LiCl (5% aq) solution, brine
4. dry with materialdried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe crude residue was purified via silica gel chromatography (1-8% MeOH-DCM)