• YAKHAK HOEJI
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• v.34 no.4
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• pp.244-251
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• 1990

N-Monoalkylations of ditertiary diamines succeed best in nitromethane or ethanol at low temperature. Unsymmetrical 1,2-diaminoethane, 1,3-diaminopropane and piperazine compounds react selectively under these conditions at the sterically less hindered nitrogen atom.