反应详情

To a solution of 2-(4,4-dimethylcyclohexyl)-1-ethanol (Preparation 15, 1.45 g, 9 mmol) and 4-bromobenzenesulfonyl chloride (2.53 g, 10 mmol) in dichloromethane (30 ml) was added triethylamine (1.9 ml, 13.5 mmol), and the reaction mixture was allowed to stir at room temperature for 24 h. After a further addition of 4-bromobenzenesulfonyl chloride (2.53 g, 10 mmol) and triethylamine (1.9 ml, 13.5 mmol), the reaction mixture was heated under reflux for 1 h. After allowing the reaction mixture to cool to room temperature, the mixture was treated with 2N aqueous hydrochloric acid (100 ml) and the phases were separated. The organic extract was dried (MgSO4), filtered and concentrated in vacuo to afford the crude product. The residue was purified by silica (80 g) column chromatography eluting with diethyl ether:hexane (1:20) to give the title compound as a colourless oil (450 mg, 13%).

1. temperaturethe reaction mixture was heated
2. temperatureunder reflux for 1 h
3. temperatureto cool to room temperature
4. customthe phases were separated
5. extractionThe organic extract
6. dry with materialwas dried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo
9. customto afford the crude product
10. customThe residue was purified by silica (80 g) column chromatography
11. washeluting with diethyl ether:hexane (1:20)