Preparation of Non-Symmetrical 2,3-Bis-(2,2'-oligopyridyl)pyrazines via 1,2-disubstituted Ethanones

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Abstract: Sequential oxidation of the condensation products be tween alkyl 2,2'-oligopyridyl carboxylates and 6-methyl pyridine homologues with m-CPBA, then iodine affords the corresponding mixed alpha-diketones. These compounds are readily transformed into the respective mixed bis-oligopyridyl pyrazines, a class of compounds of interest for supramolecular chemistry.