Chiral recognition by configurationally chiral cryptands

Abstract

1,1′,4,4′-Tetra-O-triphenylmethyl-2,2′:3,3′-bis-O- oxydiethylenedi-L-threitol [LL-(3)] and 1,2:1′,2′:5,6:5′,6′-tetra-O-isopropylidene-3,3′:4,4′- bis-O-oxydiethylenedi-D-mannitol [DD-(4)] exhibit enantiomeric differentiation in complexation equilibria towards (±)-(RS)-α-phenylethylammonium hexafluorophosphate.