Stannane, tributyl(1-ethoxyethenyl)- → 4-(1-Ethoxy-vinyl)-7-(toluene-4-sulfonyl)-7H-pyrrolo[2,3-d]pyrimidine

Participants

Reaction Conditions

Reaction Steps

[10 g, 25 mmol] of 4-Iodo-7-(toluene-4-sulfonyl)-7H-pyrrolo[2,3-d]pyrimidine was dissolved/suspended in 200 mL of dry toluene along with [2.0 g, 2.85 mmol] of palladium (II) bis-triphenylphosphine dichloride. The mixture was purged with nitrogen gas for ˜5 minutes before mixture was heated to 90° C. in an oil bath under an atmosphere of nitrogen gas. Added slowly dropwise over 2 hours, was [12.66 mL, 13.54 g, 37.5 mmol] of tri-n-butyl(1-ethoxyvinyl) tin in 100 mL of dry toluene. After completing the addition, the mixture was heated for an additional 6 hours under nitrogen. The reaction was cooled to ambient temperature and the solvent was removed under reduced pressure until the remaining volume was ⅕ the original. Added to this slurry was 160 mL of petroleum ether and the mixture was stirred for 1 hour, the solid being isolated via suction filtration and washed with petroleum ether. The damp solid was slurried in acetonitrile, stirred for one hour and the solid re-isolated via suction filtration and airdried. The resulting pale yellow solid, 7.2 g representing an 82% yield was utilized without further treatment.

Provenance & Evidence