反应详情

A solution of Ethyl 4-(3-(2,6-dimethylbenzyloxy)phenyl)butanoate (Step B, 3.26 g, 10 mmol) in abs ethanol (60 ml) was treated with 1N NaOH (20 ml) at room temperature. The reaction mixture was stirred for 3 hours, or until all the starting material is gone, concentrated and diluted with chloroform and acidified by 1M HCl to bring the pH to 3.5-4. The organic layer was washed with brine, dried over Na2SO4, filtered, concentrated and purified by flash chromatography on a silica gel column (chloroform:methanol, 95:5 spiked with acetic acid) to give the title compound as white solid.

1. concentrationconcentrated
2. additiondiluted with chloroform
3. washThe organic layer was washed with brine
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. custompurified by flash chromatography on a silica gel column (chloroform:methanol, 95:5 spiked with acetic acid)