Triphenylphosphine → Benzyl((2R,3S)-2-((4-(1-((tert-butyldiphenylsilyl)oxy)ethyl)-2H-1,2,3-triazol-2-yl)methyl)-1-(2,4-dimethoxybenzyl)-4-oxoazetidin-3-yl)carbamate

Participants

Reaction Steps

To a solution of 4-(1-((tert-butyldiphenylsilyl)oxy)ethyl)-1H-1,2,3-triazole (2.42 g, 6.88 mmol), benzyl ((2S,3S)-1-(2,4-dimethoxybenzyl)-2-(hydroxymethyl)-4-oxoazetidin-3-yl)carbamate (2.76 g, 6.88 mmol), and PPh3 (2.17 mg, 8.26 mmol) in THF (35 ml) at 0° C. was added DIAD (1.60 ml, 8.26 mmol) dropwise. The reaction was stirred at room temperature for 5 h then concentrated in vacuo. Purification of the crude residue via silica gel chromatography (EtOAc-Heptane, 30-60%) afforded the title compound (4.32 g, 85%) as a solid. LCMS: Rt=1.12 min, m/z=734 (M+1) Method 2m_acidic.

Provenance & Evidence