[C:1](=[C:4]([C:10]#[N:11])[C:5]([O:7][CH2:8][CH3:9])=[O:6])([CH3:3])[CH3:2].CO[CH:14](OC)[N:15]([CH3:17])[CH3:16]>C(O)C>[C:10]([C:4](=[C:1]([CH3:2])[CH:3]=[CH:14][N:15]([CH3:17])[CH3:16])[C:5]([O:7][CH2:8][CH3:9])=[O:6])#[N:11]A mixture of 127.7 g (0.839 mole) of ethyl isopropylidenecyanoacetate (4) and 100 g (0.839 mole) of N.N-dimethylformamide dimethyl acetal in 500 mL of ethanol was refluxed for 24 hours. The ethanol was removed under reduced pressure to give 124 g (100%) of a dark oil.
Wird geladen…