Determination of Enantiomeric Homogeneity (Optical Purity) of Cyclophosphamide by Nuclear Magnetic Resonance Spectroscopy 2

Abstract

The enantiomeric homogeneity of resolved samples of the chiral anticancer drug cyclophosphamide was evaluated directly by 1H and 31P nuclear magnetic resonance spectroscopy with the use of the optically active shift reagent tris-[3-(trifluoromethylhydroxymethylene)-d-camphorato]europlum(III). These measurements, in concert with optical rotatory dispersion spectroscopy, established that, for optically pure cyclophosphamide, [alphaD] = 2.3 +/- 0.2 degrees.