Formic Acid
> Formic acid as a reducing agent.
Recent Literature
Oxidation of alkynes to α-dicarbonyl derivatives through a convenient
one-pot procedure via a Brønsted acid-promoted "hydration" and a
DMSO-based oxidation sequence has been achieved in high yields.
Z. Wan, C. D. Jones, D. Mitchell, J. Y. Pu, T. Y. Zhang, J. Org. Chem., 2006,
71, 826-828.