Synthesis of dendritic polypyridines with ethoxycarbonyl groups as surface functionality

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Abstract
The convergent synthesis of dendritic polypyridines having an outer tier of pyridine rings 2,6-difunctionalized with ethoxycarbonyl groups is described. The dendritic fragments were prepared using 4-benzyloxy-2,6-bis(chloromethyl)pyridine and diethyl 4-hydroxypyridine-2,6-dicarboxylate as the building blocks. The final step in the synthesis was the coupling of the dendritic fragments to the trifunctional core 1,3,5-tris(bromomethyl)benzene. The data obtained by spectroscopic techniques correlate well with the structures proposed.

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