反应详情

To a solution of 1-[(2S,4R,5R)-4-acetoxy-5-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)tetrahydrofuran-2-yl]propyl benzoate (compound 26c, 4.98 g, 10.5 mmol) in methanol (105 mL) was added K2CO3 (1.38 g, 10.0 mmol). After being stirred at room temperature for 1 hour, the reaction was adjusted to pH 7.0 with HOAc (1.2 g, 20.0 mmol), concentrated in vacuo and the residue was purified by column chromatography on silica gel (eluting with 1:200 methanol in DCM) to afford 4.5 g of 1-[(2S,4R,5R)-5-(5-amino-2,7-dioxo-6H-thiazolo[4,5-d]pyrimidin-3-yl)-4-hydroxy-tetrahydrofuran-2-yl]propyl benzoate (compound 26d) as a light brown solid. MS obsd. (ESI+) [(M+H)+]: 433.

1. concentrationconcentrated in vacuo
2. customthe residue was purified by column chromatography on silica gel (eluting with 1:200 methanol in DCM)