Sodium Iodide → ({2-[({(3S,7R,8R,9S)-7-benzyl-8-(hydroxy)-9-methyl-2,6-dioxo-1,5-dioxonan-3-yl}amino)carbonyl]-4-methoxypyridine-3-yl}oxy)methyl acetate

Participants

Reaction Conditions

Reaction Steps

To a solution of Compound 1 (40 g, 90.09 mmol) in dry acetone (360 mL) was added powdered potassium carbonate (14.92 g, 108 mmol) in three portions over 5 min, the mixture stirred at 0-5° C. for 20 min and sodium iodide (2.697 g, 18 mmol) was added. Bromomethyl acetate (16.54 g, 108.11 mmol) was then added dropwise over 15 min using an addition funnel, the mixture stirred at 0-5° C. for 1 h then at RT for 3 hours. The mixture was diluted with ethyl acetate (700 mL) and water (200 mL), the organic phase rinsed with water (×2), brine. (×2), dried over sodium sulfate and concentrated in vacuo to give a solid, which was passed through silica gel (1:1 hexanes/acetone) to give 42 g of Compound 3. (M+1)+=517. Spectral data were consistent with the assigned structure.

Provenance & Evidence