Sodium Thiosulfate → tert-Butyl [tert-butoxycarbonyl(6-formylpyridin-2-yl)amino]acetate

Participants

Reaction Steps

To a solution of Dess-martin reagent (12.9 g, 30.4 mmol) in methylene chloride (130 ml) was added dropwise a solution of tert-butyl[tert-butoxycarbonyl(6-hydroxymethylpyridin-2-yl)amino]acetate (10.0 g, 29.6 mmol) obtained in Reference Example 3-(b) in methylene chloride (50 ml) over 20 minutes under ice cooling in argon atmosphere. After completion of the dropwise addition, the mixture was stirred at room temperature for 2 hours. After completion of the reaction, a 0.1% aqueous sodium thiosulfate solution (305 ml) was added to the reaction solution, followed by extraction with methylene chloride. The separated organic layer was washed sequentially with a 0.5N aqueous sodium hydroxide solution and a saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure to afford the title compound (9.61 g) substantially quantitatively as a slightly yellow oil.

Provenance & Evidence