Reductive Conversion of Thiochrome to Thiamine

Chemistry of thiamine degradation on food products and model systems. Review

“…However, Risinger and Parker (1963) converted thiochrome back to thiamine in the presence of -chloropropionic acid. Risinger et al (1966) further reported that reducing systems, DPNH, lactic acid, acetaldehyde, and ascorbic acid did not significantly reduce thiochrome to thiamine. However, benzaldehyde reduced thiochrome to thiamine (57%), apparently by a Cannizzaro reaction.…”