反应详情

To a 250-mL round-bottom flask containing a solution of methyl 1-methyl-4-[[2-(trimethylsilyl)ethoxy]methoxy]cyclohexane-1-carboxylate (3.6 g, 11.90 mmol, 1.00 equiv) in a mixed methanol/water (25 mL/4 mL) was added sodium hydroxide (2.38 g, 59.50 mmol, 5.00 equiv) and the resulting solution was heated to reflux overnight. After cooling, the pH value of the solution was adjusted to 4 with hydrochloric acid (2.0 M), extracted with 3×100 mL of ethyl acetate. The combined organic layers were washed with brine, dried over sodium sulfate and concentrated under reduced pressure. The desired 1-methyl-4-[[2-(trimethylsilyl)ethoxy]methoxy]cyclohexane-1-carboxylic acid (3.12 g, 91%) was obtained as a light yellow oil which was used in the next step without further purification.

1. temperaturethe resulting solution was heated
2. temperatureto reflux overnight
3. temperatureAfter cooling
4. extractionextracted with 3×100 mL of ethyl acetate
5. washThe combined organic layers were washed with brine
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated under reduced pressure