反应详情

To a solution of enantiomer 1 of [4-(1-{4-[2-(tert-butyl-dimethyl-silanyloxy)-3,3-dimethyl-butoxy]-3-methyl-phenyl}-1-ethyl-propyl)-2-methyl-benzyloxy]-acetic acid methyl ester (0.96 g, 1.64 mmol) and THF (10 mL) is added 1M TBAF (3.3 mL, 3.28 mmol). The solution is heated at a reflux overnight and concentrated. The residue is dissolved in MeOH (5 mL) and water (1 mL), NaOH (0.33 g, 8.21 mmol) is added and the solution is heated at reflux for 3 hours. The solution is concentration, dissolved in EtOAc (20 mL), washed with 1M HCl (15 mL), water (15 mL), brine (15 mL), dried over MgSO4, and concentrated. The residue is chromatographed to furnish the title compound (0.45 g, 0.99 mmol, 60%).

1. temperatureThe solution is heated at a reflux overnight
2. concentrationconcentrated
3. dissolutionThe residue is dissolved in MeOH (5 mL)
4. temperaturethe solution is heated
5. temperatureat reflux for 3 hours
6. concentrationconcentration
7. dissolutiondissolved in EtOAc (20 mL)
8. washwashed with 1M HCl (15 mL), water (15 mL), brine (15 mL)
9. dry with materialdried over MgSO4
10. concentrationconcentrated
11. customThe residue is chromatographed