An efficient method for the resolution of rac-VANOL by molecular complexation with (1S,2S)-(+)-diaminocyclohexane

An efficient and convenient process has been developed for the resolution of VANOL using commercially available (1S,2S)-(+)-diaminocyclohexane as the resolving reagent, with (R)- and (S)-VANOL being isolated in 86% and 74% yields, respectively. The resolving reagent was recovered in 91% yield and could be reused without any decrease in its efficiency. The X-ray structural analysis of a molecular crystal consisting of (R)-VANOL and (1S,2S)-(+)-diaminocyclohexane revealed that hydrogen bonding interactions between the functional groups of the host and guest molecules dominated the stereochemistry of the guest in the molecular complex.

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