CC1(C)[O:6][CH:5]([CH2:7][CH2:8][CH2:9][CH2:10][O:11][C:12]2[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[CH:14][CH:13]=2)[CH2:4][O:3]1>C(O)(=O)C>[OH:6][CH:5]([CH2:4][OH:3])[CH2:7][CH2:8][CH2:9][CH2:10][O:11][C:12]1[CH:13]=[CH:14][C:15]([O:18][CH3:19])=[CH:16][CH:17]=12.08 g of 4-methoxyphenyl 4-(2,2-dimethyldioxolan-4-yl)butyl ether from Example 1b were dissolved in 165 ml of 80% acetic acid and stirred at room temperature for 4 h. The acetic acid was separated off in vacuo, and the mixture was then coevaporated with toluene/methanol twice. This resulted in a crystalline product.
Loading…