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Crull EB, Buevich AV, Martin GE, Mahar R, Qu B, Senanayake CH, Molinski TF, Williamson RT. DFT investigation of coupling constant anomalies in substituted β-lactams. Magn Reson Chem 2024. [PMID: 38511664 DOI: 10.1002/mrc.5444] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 02/06/2024] [Accepted: 03/04/2024] [Indexed: 03/22/2024]
Abstract
β-lactams are a chemically diverse group of molecules with a wide range of biological activities. Having recently observed curious trends in 2JHH coupling values in studies on this structural class, we sought to obtain a more comprehensive understanding of these diagnostic NMR parameters, specifically interrogating 1JCH, 2JCH, and 2JHH, to differentiate 3- and 4-monosubstituted β-lactams. Further investigation using computational chemistry methods was employed to explore the geometric and electronic origins for the observed and calculated differences between the two substitution patterns.
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Affiliation(s)
- Emily B Crull
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Wilmington, North Carolina, USA
| | - Alexei V Buevich
- Analytical Research and Development, Merck & Co, Inc, Rahway, New Jersey, USA
| | - Gary E Martin
- Department of Chemistry and Biochemistry, Seton Hall University, West Orange, New Jersey, USA
| | - Rohit Mahar
- TCG GreenChem, Inc, Ewing, New Jersey, USA
- Current address: Department of Chemistry, Hemvati Nandan Garhwal University, (A Central University), Srinagar, Uttarakhand, India
| | - Bo Qu
- TCG GreenChem, Inc, Ewing, New Jersey, USA
| | | | - Tadeusz F Molinski
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California, USA
- Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, California, USA
| | - R Thomas Williamson
- Department of Chemistry and Biochemistry, University of North Carolina Wilmington, Wilmington, North Carolina, USA
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