Imidazole → 5'-O-tert-Butyldiphenylsilyl-thymidine

Participants

Reaction Steps

1.43 ml (5.5 mmol) of t-butyldiphenylsilyl chloride were added to a solution of 1.21 g (5 mmol) of thymidine and 0.749 g (11 mmol) of imidazole in 10 ml of dimethylformamide under an atmosphere of argon, and the resulting mixture was stirred at room temperature for 140 minutes. At the end of this time, the solvent was removed by distillation under reduced pressure, and the resulting residue was dissolved in 100 ml of methylene chloride. The solution was then washed 5 times, each time with 100 ml of water. The solution was then dried over anhydrous magnesium sulfate, after which the solvent was distilled off under reduced pressure. The residue was purified by column chromatography through 100 g of silica gel (70-230 mesh) using a gradient elution method, with methylene chloride containing from 0.5 to 3% by volume of methanol as the eluent, to give 1.5 g (yield 62%) of the title compound.

Provenance & Evidence