Two efficient synthetic routes of stable deuterium labelled 2-isopropylthioxanthone were presented with 98.1% and 98.8% isotopic abundance in acceptable yields and excellent chemical purities. Their structures and the isotope-abundance were confirmed according to proton nuclear magnetic resonance and liquid chromatography-mass spectrometry.
Keywords: 2-isopropylthioxanthone; deuterium cumene; labelled internal standards; two synthetic routes.
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