反应详情

Ethyl 3-[3-(3-methoxypropoxy)-4-{[(trifluoromethyl)sulfonyl]oxy}phenyl]propanoate (1.1 g, 2.65 mmol) was dissolved in 1,2-dimethoxyethane (15.7 ml) and ethanol (1.5 ml). 2-{3-[(tert-butylsulfonyl)methyl]-4-chlorophenyl}-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.09 g, 2.92 mmol) was added and argon was bubbled in the solution for 10 minutes. Cesium fluoride (0.89 g, 5.84 mmol) and palladium tetrakistriphenylphosphine (0.153 g, 0.13 mmol) were: added for 2.5 hours. After cooling to room temperature, solvents were evaporated under reduced pressure and the residue was dissolved in ethyl acetate and water. The organic phase was washed with saturated aqueous ammonium chloride and brine, dried over anhydrous sodium sulphate, filtered and evaporated under reduced pressure. The residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate, 9/1) giving 0.53 g (39%) of the desired product.

1. customargon was bubbled in the solution for 10 minutes
2. additionadded for 2.5 hours
3. customsolvents were evaporated under reduced pressure
4. dissolutionthe residue was dissolved in ethyl acetate
5. washThe organic phase was washed with saturated aqueous ammonium chloride and brine
6. dry with materialdried over anhydrous sodium sulphate
7. filtrationfiltered
8. customevaporated under reduced pressure
9. customThe residue was purified by flash chromatography on silica gel (cyclohexane/ethyl acetate, 9/1)