N.[K].[CH2:3]([O:5][CH:6]([O:10][CH2:11][CH3:12])[C:7](=[CH2:9])[CH3:8])[CH3:4]>CCOCC>[CH2:3]([O:5][C:6]([O:10][CH2:11][CH3:12])=[C:7]([CH3:9])[CH3:8])[CH3:4]To ammonia (500 mL) at -35° C. was added FeCl3 ·6H2O (0.1 g),then potassium metal (24.26 g), and then methacrolein diethylacetal (109 g, 0.756 mol) in ether (150 mL). The mixture was stirred at --35° C. for 3 days, then the ammonia was evaporated, additional ether (100 mL) was added and stirring was continued for another day. The mixture was filtered and the filtrate was distilled at 65° C. and 55 mm Hg to afford 46.05 g of 1,1-diethoxy-2,2-dimethylethylene (Formula V: R3 =R4 =CH3 ; R5 =R6 =OC2H5).
Wird geladen…
