反应详情

A solution of methyl-3-hydroxy-4-methoxybenzoate (Aldrich) (89.3 g, 0.49 mol), K2CO3 (100.5 g, 0.727 mol) and 1-bromo-3-methoxy-propane (80 g, 0.523 mol) in CH3CN (1100 mL) is refluxed for 6 h. After completion of the reaction, the mixture is cooled to RT and concentrated under reduced pressure. The residue is taken up into AcOEt (500 mL) and washed with water. The aqueous layer is back-extracted twice with AcOEt, and the combined organic extracts are dried over MgSO4, filtered and concentrated to afford the title compound which is further used in the next step without purification. tR (HPLC, CC 70/4 Nucleosil 3 C18HD column, 20 to 100% CH3CN in H2O in 2, then 4 min with 100% CH3CN, CH3CN and H2O with 0.1% TFA, flow: 1.5 mL/min): 3.07 min.

1. customAfter completion of the reaction
2. concentrationconcentrated under reduced pressure
3. washwashed with water
4. extractionThe aqueous layer is back-extracted twice with AcOEt
5. dry with materialthe combined organic extracts are dried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated