4-Amino-1-azabutadienes(3-amino-2-alkenimines) react with Schiff bases to afford N,N-disubstituted 4-amino-1-azabutadienes. Both the starting and the product 4-amino-1-azabutadienes can be reductively cleaved with lithium aluminum hydride followed by hydrolysis to afford 2-aminoalkyl ketones whereas the reduction with sodium/isopropanol gives 1,3-alkanediamines.