反应详情

To a solution of NaOH (4.89 g, 122 mmol) in a mixture of water (20 mL) and MeOH (20 mL) in an ice bath was added a solution of ethyl 2-(cyclohexyloxy)acetate (3.8 g, 20.4 mmol) in MeOH (10 mL) slowly and the mixture was stirred at rt for 2 h. It was then acidified to pH 4 with concentrated hydrochloric acid and extracted with DCM (20 mL×2). The combined organic layers were washed with brine (40 mL×2), dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography (EtOAc) to give the title compound as pale yellow oil (2.7 g, 84%).

1. extractionextracted with DCM (20 mL×2)
2. washThe combined organic layers were washed with brine (40 mL×2)
3. dry with materialdried over anhydrous Na2SO4
4. concentrationconcentrated in vacuo
5. customThe residue was purified by a silica gel column chromatography (EtOAc)