反应详情

温度

60 °C

Methyl 4-chloro-3-hydroxybenzoate [Chem. Pharm. Bull. 1994, 42(11),2365-9] (0.73 g), caesium carbonate (1.27 g) and tert butylbromoacetate (0.58 mL) in DMF (6 mL) were heated and stirred at 60° C. for 3 h. Water was added and the product was extracted into ethyl acetate. The extracts were dried over sodium sulphate, filtered and the solvent was evaporated. The resulting oil was purified by flash chromatography, using 1:10 ethyl acetate/isohexane as eluent, to yield the subtitle compound as a colourless oil (1.25 g).

1. extractionthe product was extracted into ethyl acetate
2. dry with materialThe extracts were dried over sodium sulphate
3. filtrationfiltered
4. customthe solvent was evaporated
5. customThe resulting oil was purified by flash chromatography