反应详情

To a deoxygenated solution of iodopyrimidine 3 (494 mg, 1.12 mmol) and 2-(2-(2-(2-(prop-2-ynyloxy)ethoxy)ethoxy)ethoxy)ethanol (Veciani, et al., Ibid.) (780 mg, 3.36 mmol) in dry DMF (1.5 mL) and dry THF (3.0 mL) were added successively dry triethylamine (562.0 mg, 5.55 mmol, 0.80 mL), copper (1) iodide (105.7 mg, 0.56 mmol), and tetrakis(triphenylphosphine)palladium (0) (128.3 mg, 0.11 mmol). The reaction mixture was stirred at 25° C. under a nitrogen atmosphere for 3 hours after which TLC (DCM/methanol=3:97) revealed a more polar product and consumption of starting material 3. The mixture was poured into EDTA solution (20 mL, 5%) and the organic product extracted into EtOAc (3×50 mL). The combined organic extracts were washed with brine (20 mL), dried over Na2SO4 and the solvent evaporated in vacuo to furnish a residue that was subjected to silica-gel column chromatography using DCM/MeOH (95:5) as eluent to produce 4 as a light-brown oil (522.0 mg, 0.956 mmol, 85%).

1. customa more polar product and consumption of starting material 3
2. additionThe mixture was poured into EDTA solution (20 mL, 5%)
3. extractionthe organic product extracted into EtOAc (3×50 mL)
4. washThe combined organic extracts were washed with brine (20 mL)
5. dry with materialdried over Na2SO4
6. customthe solvent evaporated in vacuo
7. customto furnish a residue that