Synthesis 2019; 51(10): 2081-2099
DOI: 10.1055/s-0037-1612420
short review
© Georg Thieme Verlag Stuttgart · New York

Different Strategies for Obtaining Enantiopure Hemicryptophanes

Cédric Colomban
,
Bastien Châtelet
,
Alexandre Martinez*
This research was supported by Agence National de la Recherche (ANR, France, OH Risque grant ANR-14-OHRI-0015-03).
Further Information

Publication History

Received: 06 December 2018

Accepted after revision: 13 February 2019

Publication Date:
24 April 2019 (online)


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