反应详情

温度

-35 °C

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).

1. customthe ammonia was evaporated
2. additionadditional ether (100 mL) was added
3. stirringstirring
4. waitwas continued for another day
5. filtrationThe mixture was filtered
6. distillationthe filtrate was distilled at 65° C.