Abstract
A supercritical fluid chromatography method was developed for the detection of intramolecular hydrogen bonds in pharmaceutically relevant molecules. The identification of compounds likely to form intramolecular hydrogen bonds is an important drug design consideration given the correlation of intramolecular hydrogen bonding with increased membrane permeability. The technique described here correlates chromatographic retention with the exposed polarity of a molecule. Molecules that can form an intramolecular hydrogen bond can hide their polarity and therefore exhibit lower retention than similar compounds that cannot. By use of a pairwise analysis strategy, intramolecular hydrogen bonds are identified within a test set of compounds with diverse topologies. The chromatographic results are confirmed by NMR chemical shift and temperature coefficient studies.
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