反应详情

温度

40 °C

A solution of 4-[3-(4,4-dimethyl-chroman-7-yl)-oct-1-enyl]-benzoic acid methyl ester (0.1 g, 0.25 mmole) in 25 mL of a 4:1 THF/methanol mixture was treated with a solution of 0.1 g of lithium hydroxide monohydrate in 5 mL of water. The reaction mixture was stirred at 40° C. for 2 hours, concentrated in vacuo and the pH adjusted to 3-4 with 1N HCl solution. The mixture was extracted with three 25 mL portions of ethyl acetate. The combined organic extracts were dried over MgSO4, filtered and concentrated in vacuo to give 0.06 g of 4-[3-(4,4-dimethyl-chroman-7-yl)-oct-1-enyl]-benzoic acid as a colorless glassy oil. MS (EI): (M−−1): 391.

1. concentrationconcentrated in vacuo
2. extractionThe mixture was extracted with three 25 mL portions of ethyl acetate
3. dry with materialThe combined organic extracts were dried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo