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Synthesis and Studies of Pyridoneimine-Functionalized PETIM Dendrimers.

ABSTRACT: Pyridinoimine-functionalized poly(ether imine) (PETIM) dendrimers of 1-3 generations, possessing 4-16 moieties at the peripheries, are synthesized. Chloride-functionalized dendrimers are reacted with N-methylamino pyridine, under basic conditions, which led to functionalization of the peripheries of a dendrimer with pyridoneimine moieties. Variable-temperature ¹H NMR studies are performed to assess the contributing resonance forms of pyridoneimine in the dendrimers. Solvatochromism and ¹⁵N NMR studies aid further the assessment of the contributing resonance forms. Comparison with derivatives that possess 1 and 2 pyridoneimines illustrates the contributing resonance forms between nonaromatic pyridoneimine and zwitter ionic aromatic imidopyridinium species.

SUBMITTER: Dey K

PROVIDER: S-EPMC10552491 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature

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Synthesis and Studies of Pyridoneimine-Functionalized PETIM Dendrimers.

Dey Kalyan K Jayaraman Narayanaswamy N

ACS omega 20230920 39

Pyridinoimine-functionalized poly(ether imine) (PETIM) dendrimers of 1-3 generations, possessing 4-16 moieties at the peripheries, are synthesized. Chloride-functionalized dendrimers are reacted with <i>N</i>-methylamino pyridine, under basic conditions, which led to functionalization of the peripheries of a dendrimer with pyridoneimine moieties. Variable-temperature <sup>1</sup>H NMR studies are performed to assess the contributing resonance forms of pyridoneimine in the dendrimers. Solvatochro ...[more]

PMID: 37810657

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