[CH3:1][C:2](=[CH:5][CH:6]([O:10][CH2:11][CH3:12])[O:7][CH2:8][CH3:9])[CH:3]=[O:4].CC(=CCBr)C=O>>[CH3:1][CH:2]([CH2:5][CH:6]([O:7][CH2:8][CH3:9])[O:10][CH2:11][CH3:12])[CH:3]=[O:4]The procedure described in Example 3 is repeated but 11.9 g of 2-methyl-4,4-diethoxy-2-butenal is used insteat of 16.3 g of 2-methyl- 4-bromo-2-butenal. Pure 2-methyl-4,4-diethoxybutanal is obtained in a yield of 89% of theory.
Wird geladen…