C(=O)([O-])[O-].[K+].[K+].C([O:15][C@@H:16]1[CH2:21][C@@:20]([OH:26])([C:22]([O:24][CH3:25])=[O:23])[CH2:19][C@@H:18]([CH:27]=[CH2:28])[C@@H:17]1[OH:29])(=O)C1C=CC=CC=1>CO>[OH:26][C@:20]1([C:22]([O:24][CH3:25])=[O:23])[CH2:19][C@@H:18]([CH:27]=[CH2:28])[C@H:17]([OH:29])[C@H:16]([OH:15])[CH2:21]1Potassium carbonate can be added to a room temperature solution of Example 17E in methanol. After stirring for 1 hour, the reaction mixture can be filtered, and concentrated. The concentrate can be purified by flash chromatography to afford the desired product.
Wird geladen…