Articles | Volume 2, issue 1
https://doi.org/10.5194/mr-2-281-2021
https://doi.org/10.5194/mr-2-281-2021
Research article
 | 
07 May 2021
Research article |  | 07 May 2021

Non-classical disproportionation revealed by photo-chemically induced dynamic nuclear polarization NMR

Jakob Wörner, Jing Chen, Adelbert Bacher, and Stefan Weber

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Latest update: 21 Feb 2024
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Short summary
Methyl groups are rarely acidic. But in a lumazine derivative with biological significance the position-7 methyl group can be deprotonated. The existence of two protonation states is a prerequisite for a non-classical disproportionation reaction initiated by light. We provide evidence for such dismutation using a variant of nuclear magnetic resonance that is capable of detecting nuclear hyperpolarization. Our findings may shed new light on enzymatic riboflavin biosynthesis.