反应详情

2-Ethoxyphenol (56.6, 0.401 mol, 1 eq.), glyoxylic acid (50% aqueous solution) (41.0 mL, 0.396 mol, 0.99 eq.), and distilled water (110 mL) were combined. The mixture was cooled in an ice bath, and a solution of 10% NaOH (32.2 g NaOH in 300 mL distilled water, 0.805 mol, 2 eq.) was slowly added via addition funnel. The reaction was allowed to slowly warm to room temperature, and after ˜18 hours, the solution was washed with ethyl acetate (4×250 mL), then acidified with 6N HCl until pH ˜3. NaCl was added and the product was then extracted into ethyl acetate (4×200 mL). The organic phase was washed with brine, dried over magnesium sulfate, and solvent was removed under vacuum, giving 51.8 g of intermediate 2 as a light pink solid.

1. temperatureThe mixture was cooled in an ice bath
2. washthe solution was washed with ethyl acetate (4×250 mL)
3. additionNaCl was added
4. extractionthe product was then extracted into ethyl acetate (4×200 mL)
5. washThe organic phase was washed with brine
6. dry with materialdried over magnesium sulfate, and solvent
7. customwas removed under vacuum