Sodium Hydroxide → 2-(4-Tert-butyldimethylsilyloxymethyl-2-propylphenoxy)-2-phenylacetic acid
反応式
[Si:1]([O:8][CH2:9][C:10]1[CH:27]=[CH:26][C:13]([O:14][CH:15]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[C:16]([O:18]C)=[O:17])=[C:12]([CH2:28][CH2:29][CH3:30])[CH:11]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[OH-].[Na+]>CO>[Si:1]([O:8][CH2:9][C:10]1[CH:27]=[CH:26][C:13]([O:14][CH:15]([C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)[C:16]([OH:18])=[O:17])=[C:12]([CH2:28][CH2:29][CH3:30])[CH:11]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:2])[CH3:3]参加物
4
実験手順
To a solution of 1.875 g (4.38 mmol) of the product of Step K in methanol (20 mL) was added 1N NaOH (4.82 mL, 4.82 mmol) at rt. The solution was stirred at rt for 3 hours. After the solvent was evaporated under reduced pressure, the residue was dissolved in H2O (30 mL) and washed with ethyl acetate (30 mL). The aqueous layer was acidified to pH=3 with 2N HCl. A milky emulsion was extracted with ethyl acetate (3×). The combined organic layer was washed with brine, and was dried over anhydrous MgSO4. Concentration afforded 0.929 g of the title compound as a colorless glass.