POLYORGANOMETALLIC HETEROCYCLES. 2,6-DILITHIOPYRIDINE

Article abstract of DOI:10.1016/S0022-328X(00)89862-9

Metal-halogen exchange between 2,6-diiodo- and 2,6-dibromopyridine and two equivalents of n-butyllithium gives 2,6-dilithiopyridine.On quenching with either carbon dioxide followed by esterification, methanol or dimethyl disulfide the dilithio compound gives a methyl 2,6-pyridinedicarboxylate, pyridine, or 2,6-dithiomethylpyridine, respectively.A convenient procedure for halogen-halogen exchange is also described.