反应详情

A solution of methyl 4-(3-mercaptophenyl)-3,4,5,6-tetrahydro-2H-pyran-4-carboxylate (1.04 g, 3.5 mmol), 4-(2-methylimidazol-1-yl)phenyliodide (0.89 g, 3.5 mmol), sodium t-butoxide (673 mg, 7 mmol) and tetrakis(triphenylphosphine)palladium (162 mg, 0.14 mmol) in dry ethanol (20 ml) was heated to reflux with stirring overnight. Volatiles were removed by evaporation and the residue was partitioned between ethyl acetate (100 ml) and water (100 ml). The aqueous layer was extracted with ethyl acetate (100 ml). The combined organic layers were washed with brine (100 ml), dried (magnesium sulfate) and concentrated to dryness to give 1.09 g of crude product as a brown liquid. Purification by column chromatography (silica-gel, 50 g; methanol in dichloromethane, increasing the ratio of methanol from 0% to 4%) afforded the titled compound (0.90 g).

1. temperatureto reflux
2. customVolatiles were removed by evaporation
3. customthe residue was partitioned between ethyl acetate (100 ml) and water (100 ml)
4. extractionThe aqueous layer was extracted with ethyl acetate (100 ml)
5. washThe combined organic layers were washed with brine (100 ml)
6. dry with materialdried (magnesium sulfate)
7. concentrationconcentrated to dryness
8. customto give 1.09 g of crude product as a brown liquid
9. customPurification by column chromatography (silica-gel, 50 g
10. temperaturemethanol in dichloromethane, increasing the ratio of methanol from 0% to 4%)