反应详情

温度

80 °C

To a degassed solution of 4-acetylamino-3-iodo-benzoic acid methyl ester (41.4 g, 130 mmol) in DMF (200 mL) and triethylamine (40 mL) were added PdCl2(PPh3)2 (3.99 g, 5.68 mmol) and copper (I) iodide (7.43 g, 39.0 mmol). A degassed solution of 2-but-3-ynyloxy-tetrahydro-pyran (30.1 g, 195 mmol) in DMF (100 mL) and triethylamine (20 mL) was added at 80° C. over a period of 1 hour under nitrogen. After the addition, the reaction mixture was stirred at 80° C. for 2 hours and then cooled to room temperature. Solvent was evaporated under reduced pressure. Ethyl acetate (200 mL) was added. The solid was filtered, and washed with ethyl acetate. The ethyl acetate solution was washed with brine, and dried over anhydrous Na2SO4. The organic phase was concentrated to dryness, to afford 66.8 g crude 4-acetylamino-3-[4-(tetrahydro-pyran-2-yloxy)-but-1-ynyl]-benzoic acid methyl ester. This was used in next step without further purification.

1. additionAfter the addition
2. temperaturecooled to room temperature
3. customSolvent was evaporated under reduced pressure
4. additionEthyl acetate (200 mL) was added
5. filtrationThe solid was filtered
6. washwashed with ethyl acetate
7. washThe ethyl acetate solution was washed with brine
8. dry with materialdried over anhydrous Na2SO4
9. concentrationThe organic phase was concentrated to dryness