.
Oxidation will probably also oxidize the N of the pyridine to N-oxide
PCC should not oxidize pyridine. Try pyridinemethanol and PCC.
How about instead to try and reduce the corresponding 2-carboxyl acid (via acyl chloride)?
CN102241624 chinese patent; oxidation from picoline
Start with 2-methyl pyridine and oxidize it with SeO2 in refluxing Toluene, you will get the 2-formyl in good yield.
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