反应详情

3-Methoxythiophenol (10.00 g, 71.33 mmol), bromoacetaldehyde diethyl acetal (11.47 mL, 76.24 mmol), potassium carbonate (10.35 g, 74.89 mmol) and acetone (100 mL) were stirred at ambient temperature under nitrogen for 3 h. The white suspension was filtered, washed with acetone (2×25 mL) and the combined filtrate and washings concentrated to dryness in vacuo. The residue was dissolved in ethyl acetate (50 mL) and washed with 0.5N NaOH (aq.) (2×15 mL), water 15 mL) and brine (15 mL). The organic layer was dried (MgSO4) and concentrated in vacuo and then further dried at 130° C. under high vacuum to give the title compound (18.74 g, quantitative).

1. filtrationThe white suspension was filtered
2. washwashed with acetone (2×25 mL)
3. concentrationthe combined filtrate and washings concentrated to dryness in vacuo
4. dissolutionThe residue was dissolved in ethyl acetate (50 mL)
5. washwashed with 0.5N NaOH (aq.) (2×15 mL), water 15 mL) and brine (15 mL)
6. dry with materialThe organic layer was dried (MgSO4)
7. concentrationconcentrated in vacuo
8. customfurther dried at 130° C. under high vacuum