Preparation of both antipodes of enantiopure inherently chiral calix[4]crowns

J Org Chem. 2004 Jan 9;69(1):206-8. doi: 10.1021/jo0354185.

Abstract

Both antipodes of enantiopure inherently chiral calix[4]crown derivatives were successfully obtained through separation of their BINOL diastereomeric derivatives of corresponding racemates using preparative TLC instead of conventional HPLC methods. Such a result provides a basis for future study of chiral recognition and asymmetric catalysis with inherently chiral calixrene derivatives.