Tetrahydrofuran → HCID 131724438, compound

Participants

Reaction Steps

To a suspension of NaH (60% in mineral oil, 0.18 g; 7.5 mmol) in anhydrous THF (18 ml) at 0° C. under argon was added dropwise a solution of 5′-O-(4,4′-dimethoxytrityl)-3′-p-toluensulfonyloxymethylthymidine (1.5 g; 2.06 mmol) in THF (10 ml). The resulting reaction mixture was stirred at room temperature for 2 h, cooled to 0° C., and quenched by addition of water. The mixture was diluted with EtOAc (250 ml), washed with water (2×200 ml), then with 10% NaHCO3 (2×200 ml), dried over Na2SO4, and concentrated. The residue was purified by chromatography on silica (5% CH3OH in CH2Cl2) to yield 0.97 g (8.5%) of 5′-O-(4,4-dimethoxytrityl)-3′-C,O-methylene thymidine as a foam.

Provenance & Evidence