反应详情

To a stirred solution of methyl 5-hydroxy-3-methyl-benzo(b)thiophene-2-carboxylate (878.6 mg, 3.96 mmol) in dry DMF (20 ml) at room temperature is added sodium hydride (158 mg, 3.95 mmol) as a 60% dispersion in mineral oil. After 30 minutes of stirring 3-(2-quinolinylmethoxy)benzyl chloride (1.02 g, 3.60 mmol) is added. The solution is stirred at room temperature for 4 hours and quenched with ice-water. Extraction with ethyl acetate, washing with aqueous sodium carbonate, water and brine is followed by drying (MgSO4) and concentration. The residue is subjected to flash chromatography on silica gel. Elution with 25% ether in hexane affords methyl-3-methyl-5-[3-(2-quinolinylmethoxy)benzyloxy]benzo(b) -thiophene-2-carboxylate.

1. customquenched with ice-water
2. extractionExtraction with ethyl acetate
3. washwashing with aqueous sodium carbonate, water and brine
4. customby drying
5. concentration(MgSO4) and concentration
6. washElution with 25% ether in hexane