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Using 2 H labelling to improve the NMR detectability of pyridine and its derivatives by SABRE
Philip Norcott1, Michael J Burns1, Peter J Rayner1
1Department of Chemistry, University of York, York, YO10 5DD, UK.
Abstract:
By introducing a range of 2 H labels into pyridine and the para-substituted agents, methyl isonicotinate and isonicotinamide, we significantly improve their NMR detectability in conjunction with the signal amplification by reversible exchange process. We describe how the rates of T1 relaxation for the remaining 1 H nuclei are increased and show how this leads to a concomitant increase in the level of 1 H and 13 C hyperpolarization that can ultimately be detected.
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