[OH:1][C:2](=[C:5]1[C:10](=[O:11])[O:9][C:8]([CH3:13])([CH3:12])OC1=O)[CH2:3][CH3:4].[CH3:15]C(O)(C)C>C1C=CC=CC=1>[O:1]=[C:2]([CH2:3][CH3:4])[CH2:5][C:10]([O:9][C:8]([CH3:12])([CH3:13])[CH3:15])=[O:11]A solution of 5-(1-hydroxypropylidene)-2,2 dimethyl-1,3-dioxane-4,6-dione (18.2 g, 69.4 mmol), tBuOH (19.9 ml, 208 mmol) and benzene (400 ml) was heated at reflux for 6 hours. Concentration in vacuo gave a red liquid.
Wird geladen…