Abstract
Linear 1,2,3,4-heterohexatrienes of type H2C=CHP(R)2=NP(R′)2=X
(X = O, S) are used in Michael-type additions
of various primary or secondary amines and hydrazines. The use of
functionalized amines allowed the grafting of other functions, such
as a double or a triple bond, a sulfide, an imidazole, or a phenol,
and various types of NH2 groups. These groups were used in
condensation reactions, leading to the grafting of new functions such
as phenols. Thus, the P(R)2=NP(R′)2=X
group appears as a new electron withdrawing group, very easily tunable
by changing the R′ or X substituents.
Key words
Michael additions - alkenes - aminations - dendrimers - phosphorus
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