Thymidine → 5'-O-(9-Phenylxanthen-9-yl)thymidine

Participants

Reaction Steps

585 mg (2 mmol) of 9-chloro-9-phenylxanthene were added to a solution of 484 mg (2 mmol) of thymidine in 20 ml of pyridine, and the resulting mixture was stirred at room temperature for 1 hour whilst shading it from light. The reaction mixture was then diluted with 200 ml of methylene chloride, and the diluted mixture was washed twice, each time with 200 ml of a 5% w/v aqueous solution of sodium hydrogencarbonate. The organic layer was dried over anhydrous sodium sulfate, and the solvent was removed by distillation under reduced pressure. The residue was purified by column chromatography through 35 g of silica gel (70-230 mesh), using methylene chloride containing from 0 to 2.5% by volume of methanol as the eluent, to give 647.8 mg (yield 65%) of the title compound. 1H Nuclear Magnetic Resonance Spectrum (CDCl3, 270 MHz, TMS), δ ppm:

Provenance & Evidence