反应详情

To a solution of 1-benzyl-4-[2-(2-hydroxy-ethyl)-phenyl]-piperidin-4-ol (2.0 g, 6.6 mmol) and triethylamine (1.9 ml, 14 mmol) dry tetrahydrofuran (50 ml) was added methanesulfonyl chloride (0.48 ml, 6.2 mmol) at room temperature. The reaction mixture was heated at reflux for 4 h. Quenching with water and basification with 1 M aqueous sodium hydroxide solution was followed by extraction with three portions of ethyl acetate. The combined organic layers were dried over anhydrous sodium sulfate and concentrated in vacuo. Flash chromatography of the crude product with n-heptane/ethyl acetate as eluent gave the title compound (0.40 g, 21%) as yellow oil. MS m/e: 294 (M+H+).

1. temperatureThe reaction mixture was heated
2. temperatureat reflux for 4 h
3. customQuenching with water and basification with 1 M aqueous sodium hydroxide solution
4. extractionwas followed by extraction with three portions of ethyl acetate
5. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
6. concentrationconcentrated in vacuo