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Updated: Oct 20, 2025

High-Temperature and High-Pressure In situ Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
Published on: October 9, 2020
Fast 19F Magic-Angle Spinning Nuclear Magnetic Resonance for the Structural Characterization of Active Pharmaceutical
Caitlin M Quinn1, Roman Zadorozhnyi1,2, Jochem Struppe3
1Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States.
Abstract:
Fluorinated drugs occupy a large and growing share of the pharmaceutical market. Here, we explore high-frequency, 60 to 111 kHz, 19F magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy for the structural characterization of fluorinated active pharmaceutical ingredients in commercial formulations of seven blockbuster drugs: Celebrex, Cipro, Crestor, Levaquin, Lipitor, Prozac, and Zyvox. 19F signals can be observed in a single scan, and spectra with high signal-to-noise ratios can be acquired in minutes. 19F spectral parameters, such as chemical shifts and line widths, are sensitive to both the nature of the fluorine moiety and the formulation. We anticipate that the fast 19F MAS NMR-based approach presented here will be valuable for the rapid analysis of fluorine-containing drugs in a wide variety of formulations.
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