NotesDetermination of Dextro- and levomethorphan (cas 125-70-2) Mixtures Using Chiral Lanthanide NMR Shift Reagents

Add time:09/09/2019    Source:sciencedirect.com

Europium and praseodymium chiral NMR shift reagents were used to differentiate between dextro- and levomethorphan (cas 125-70-2). The enantiomeric shift differences (ΔΔδ) demonstrated by the singlet associated with the methoxy protons were large enough to identify the levo- and dextro-isomers and to allow for the determination of as little as 10% of one enantiomer in the presence of the other in a prepared mixture. The analytical method is rapid and can analyze samples as small as 1 mg.

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