反应详情

To a 250 mL dry round bottom flask were added 4-hydroxybenzaldehyde (6.11 g, 50.0 mmol), anhydrous CH2Cl2 (80 mL) and pyridine (4.86 mL, 60.0 mmol). The mixture was stirred in an ice-water, then 4-morpholinecarbonyl chloride (6.12 mL, 52.5 mmol) was added. The mixture was stirred and warmed slowly to room temperature, then stirred at room temperature overnight. An aqueous solution of 5% NaHCO3 (100 mL) was added to the reaction mixture. The CH2Cl2 layer was separated, and the aqueous layer was extracted continually with CH2Cl2 (50 mL×2). The combined CH2Cl2 solution was dried over Na2SO4. Removal of the solvent gave 4-formylphenyl morpholine-4-carboxylate (8.80 g) as white solid. Yield: 75%. 1H NMR (CDCl3, 300 MHz): δ=9.97 (s, 1H), 7.90 (d, J=9.0 Hz, 2H), 7.30 (d, J=9.0 Hz, 2H), 3.77-3.57 (m, 6H). 13C NMR (CDCl3, 75.5 MHz, mixture of two isomers): δ=191.0, 156.0, 152.6, 133.6, 131.1, 122.3, 66.5, 66.4, 45.0, 44.2.

1. customTo a 250 mL dry round bottom flask
2. stirringstirred at room temperature overnight
3. customThe CH2Cl2 layer was separated
4. extractionthe aqueous layer was extracted continually with CH2Cl2 (50 mL×2)
5. dry with materialThe combined CH2Cl2 solution was dried over Na2SO4
6. customRemoval of the solvent