反应详情

Combine methyl 2-hydroxy-5-(t-butyldimethylsilyloxy)benzoate (14.2 g, 50.2 mmol), potassium carbonate (13.88 g, 100.4 mmol), and methyl iodide (20 mL, 321 mmol) in acetone (125 mL). Heat to reflux. After 17 hours, add methyl iodide (10 mL). After 23 hours, cool the reaction mixture to ambient temperature and add diethyl ether (600 mL), filter, and evaporate the filtrate in vacuo to give a residue. Chromatograph the residue on silica gel eluting with 10% ethyl acetate/hexane to give methyl 2-methoxy-5-(t-butyldimethylsilyloxy)benzoate. Rf=0.39 (silica gel, 5% ethyl acetate/hexane).

1. temperatureHeat to reflux
2. waitAfter 23 hours
3. filtrationfilter
4. customevaporate the filtrate in vacuo
5. customto give a residue