反应详情

To a 250 mL dry round bottom flask were added 4-hydroxybenzaldehyde (4.88 g, 40.0 mmol), anhydrous CH2Cl2 (40 mL) and pyridine (4.2 mL, 52.0 mmol). The mixture was stirred in an ice-water bath, then a solution of isopropyl chloroformate in toluene (1.0 M, 48.0 mL) was added. After stirring at 0° C. for 2 hours, water (100 mL) and MTBE (300 mL) were added to the reaction mixture. The aqueous layer was separated, and the MTBE layer was washed, respectively, with cold water (80 mL), cold 5% NaOH aqueous solution (80 mL), cold water (80 mL), cold 0.5 N HCl aqueous solution (80 mL) and cold water (80 mL). The organic layer was dried over Na2SO4, and the solvent was evaporated to give 4-formylphenyl isopropyl carbonate (8.50 g) as pale yellow oil. Yield: 100%. 1H NMR (CDCl3, 300 MHz): δ=9.71 (s, 1H), 7.64 (d, J=8.4 Hz, 2H), 7.10 (d, J=8.7 Hz, 2H), 4.73 (seventet, J=6.0 Hz, 1H), 1.12 (d, J=6.3 Hz, 6H).

1. customTo a 250 mL dry round bottom flask
2. stirringAfter stirring at 0° C. for 2 hours
3. customThe aqueous layer was separated
4. washthe MTBE layer was washed
5. dry with materialThe organic layer was dried over Na2SO4
6. customthe solvent was evaporated