New type chiral calix[4](aza)crowns: synthesis and chiral recognition

Two new types of chiral calix[4](aza)crowns containing L-Valine were synthesized by the reaction of calix[4]arene diacid dichloride with the corresponding chiral diamines derived from C-2-symmetric chiral disulfonamides. Preliminary application of one ligand in chiral recognition was Studied by H-1 and C-13 NMR, and UV spectroscopy. (C) 2002 Elsevier Science Ltd. All rights reserved.