[CH2:1]([NH:8][C:9](=[O:13])[CH2:10][C:11]#[N:12])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.CO[CH:16](OC)[N:17]([CH3:19])[CH3:18]>>[CH2:1]([NH:8][C:9](=[O:13])[C:10]([C:11]#[N:12])=[CH:16][N:17]([CH3:18])[CH3:19])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1As for Example 1, N-benzyl-2-cyanoacetamide, m.p. 122°-123° C., is heated with N,N-dimethylformamide dimethylacetal to give N-benzyl-2-cyano-3-dimethylaminoacrylamide as colorless needles, m.p. 160.5°-161° C.
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