Bis-β-cyclodextrinyl- and bis-cellobiosyl-diazacrowns: synthesis and molecular complexation behaviors toward Busulfan anticancer agent and two basic aminoacids

The one-step synthesis of two C-2-symmetric receptors including two beta-cyclodextrin cores or two disaccharidyl units connected by urea linkers to a diazacrown ether organizing platform is reported. The X-ray structure of the peracetylated bis-ureidocellobiosyl podand could be determined. These molecular systems, long thought to be potent selective carriers for chiral/achiral organic guests at the supramolecular level, were found to be efficient complexing tools toward the Busulfan anticancer agent but also toward L-arginine and L-lysine basic aminoacids. (C) 2009 Elsevier Ltd. All rights reserved.