反应详情

温度

0 °C

To a solution of methyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate (from the previous step) (1.0 eq.) in THF (0.2 M), was added TBAF (0.2 eq.) slowly at 0° C. Then the reaction mixture was stirred at 0° C. for 1 hour. After warmed to ambient temperature, the reaction mixture was diluted with ethyl acetate and water. The two phases were separated, and the aqueous layer was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vaccuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-80% ethyl acetate in hexane to give methyl 4-ethynyl-3-methylbenzoate as a white solid.

1. temperatureAfter warmed to ambient temperature
2. customThe two phases were separated
3. extractionthe aqueous layer was extracted twice with ethyl acetate
4. washThe combined organic layers were washed with brine
5. dry with materialdried over anhydrous MgSO4
6. concentrationconcentrated en vaccuo
7. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)