ALIPHATIC AMINO AZIDES AS KEY BUILDING-BLOCKS FOR EFFICIENT POLYAMINE SYNTHESES

New routes to open-chain polyamines have been developed using aliphatic amino azides as common precursors for the construction of the carbon-nitrogen framework. These alpha,omega-diaminoalkane synthetic equivalents were combined with (omega-halogenoalkyl)dichloroboranes to extend the polyamine chain from the azido moiety. An extension from the free amino group can also be achieved via a Michael type addition with acrylonitrile or a reductive amination with a gamma-azido ketone. Further transformations led to a large variety of regioselectively C- or (and) N-substituted polyamines.