The reaction of N-substituted 1,2-diaminoethanes and 1,3-diaminopropanes (1) with succinaldehyde (2) and glutaraldehyde (9) in water gave the 2:2 condensation products (4 and 10).
OKAWARA, TADASHI;EHARA, SHUJI;MATSUMOTO, SHIGENORI;OKAMOTO, YOSHINARI;FUR+, J. CHEM. SOC., PERKIN TRANS. PT 1,(1990) N, C. 2160-2161