[CH:1](=O)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH3:7].[CH2:9]([NH2:13])[C:10](=[CH2:12])[CH3:11]>>[CH:1](=[N:13][CH:9]=[C:10]([CH3:12])[CH3:11])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH3:7]The N-heptylidene-(2-methylpropenylamine) was prepared from heptanal and methallylamine, with subsequent isomerisation of the reaction product with potassium tert.-butylate; boiling point 54° C./5 Pa; nD20 =1.4662.
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