Preparation of 3-(alkylamino)imidazo[1,2-a]pyridine-2-carbaldehydes via Kornblum oxidation and unexpected ring-opening reactions of the corresponding alcohols under oxidative conditions

• Sandile J. Mkhize,
• Memory Zimuwandeyi,
• Manuel A. Fernandes,
• Amanda L. Rousseau and
• Moira L. Bode

Beilstein J. Org. Chem. 2026, 22, 763–770, doi:10.3762/bjoc.22.58

• -chloroaniline. Alternative oxidation conditions such as PCC, IBX or T. versicolor laccase applied to the alcohols led only to oxidative ring-opening to give oxalamide derivatives, with no aldehyde being isolated. Keywords: 3-aminoimidazo[1,2-a]pyridine-2-carbaldehydes; Groebke–Blackburn–Bienaymé reaction