Abstract
Hemicryptophanes have recently emerged as an attractive class of cages due to their
interesting applications as supramolecular receptors and catalysts. Over the last
decade, substantial advances have been made regarding the preparation of enantiopure
versions of these synthetic receptors. Enantiopure hemicryptophanes are commonly obtained
through the separation of diastereomers by chromatography, or by resolution of racemic
mixtures using chiral HPLC. This short review summarizes the existing methods to access
to these chiral organic architectures and discusses the benefits and drawbacks of
each approach.
1 Introduction
2 Enantiopure Hemicryptophanes Obtained by Introducing Additional Chiral Units and
Separation of Diastereomers
2.1 Synthesis by Means of Intramolecular Macrocyclization Reactions
2.2 [1+1] Coupling of the CTV and the Southern Part
3 Enantiopure Hemicryptophanes Obtained by Means of Chiral HPLC Resolution of Enantiomers
3.1 Resolution of Hemicryptophane Racemates
3.2 Resolution of CTV-Based Precursor Racemates
4 Conclusion
Key words
hemicryptophanes - chiral recognition - resolution - cyclotriveratrylene - supramolecular
chemistry