反应详情

A solution of 15 g (90.3 mmol) of methyl 4-hydroxyphenylacetate in 25 mL of dimethylformamide (DMF) was added 32.4 g (99.3 mmol) of cesium carbonate, followed by 13.4 mL (112.9 mmol) of benzyl bromide (BnBr), and the resulting heterogeneous mixture was stirred at rt for 72 h. The reaction mixture was filtered, the solids were washed with ethyl acetate, and the combined organic extracts were concentrated to give a residue which was chromatographed on silica gel (25% hexane in dichloromethane) to afford 19.1 g (83% yield) of desired (4-benzyloxy-phenyl)-acetic acid methyl ester as indicated by 1H NMR; LC-MS—calcd for C16H16O3 [M++H]+: 257.11, found: 257.2.

1. filtrationThe reaction mixture was filtered
2. washthe solids were washed with ethyl acetate
3. concentrationthe combined organic extracts were concentrated
4. customto give a residue which
5. customwas chromatographed on silica gel (25% hexane in dichloromethane)