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Robertson TBR, Gilbert N, Sutcliffe OB, Mewis RE. Hyperpolarisation of Mirfentanil by SABRE in the Presence of Heroin. Chemphyschem 2021; 22:1059-1064. [PMID: 33871116 DOI: 10.1002/cphc.202100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/05/2021] [Indexed: 11/06/2022]
Abstract
Mirfentanil, a fentanyl derivative that is a μ-opioid partial agonist, is hyperpolarised via Signal Amplification By Reversible Exchange (SABRE), a para-hydrogen-based technique. [Ir(IMes)(COD)Cl] (IMes=1,3-bis(2,4,6-trimethylphenyl)imidazole-2-ylidene, COD=cyclooctadiene) was employed as the polarisation transfer catalyst. Following polarisation transfer at 6.5 mT, the pyrazine-protons were enhanced by 78-fold (polarisation, P=0.04 %). The complex [Ir(IMes)(H)2 (mirfentanil)2 (MeOH)]+ is proposed to form based on the observation of two hydrides at δ -22.9 (trans to mirfentanil) and -24.7 (trans to methanol). In a mixture of mirfentanil and heroin, the former could be detected using SABRE at concentrations less than 1 % w/w. At the lowest concentration analyzed, the amount of mirfentanil present was 0.18 mg (812 μM) and produced a signal enhancement of -867-fold (P=0.42 %). following polarisation transfer at 6.5 mT.
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Affiliation(s)
- Thomas B R Robertson
- Department of Natural Sciences, Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK.,Current address: School of Chemistry, University of Southampton, SO17 1BJ, Southampton, UK
| | - Nicolas Gilbert
- Department of Natural Sciences, Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK.,MANchester DRug Analysis and Knowledge Exchange (MANDRAKE), Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK
| | - Oliver B Sutcliffe
- Department of Natural Sciences, Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK.,MANchester DRug Analysis and Knowledge Exchange (MANDRAKE), Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK
| | - Ryan E Mewis
- Department of Natural Sciences, Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK.,MANchester DRug Analysis and Knowledge Exchange (MANDRAKE), Manchester Metropolitan University, John Dalton Building, Chester St., Manchester, M1 5GD, UK
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