New supramolecular host systems. 41 Novel diacetal podands, diazacrowns and cryptands

Article abstract of DOI:10.1016/0040-4039(95)01938-E

New and important key podands bearing the cis-1,3,5,7-tetraoxadecalin (TOD) core are reported, viz., 2,6-di(hydroxymethyl)- (2) and 2,6-di(aminomethyl)-cis-l,3,5,7-TOD (6), which lead to the first diazacrown-TOD compounds (9a) and (9b) and a corresponding cryptand (11) in the series. 9a&b exhibit very good alkali and earth-alkali ion inclusion ability with selectivity for K⁺ and Ba⁺². Molecular dynamics (Insight/Discover/AMBER) on the crowns and cryptand were performed, including reparametrized MM3-GE calculations. A convincing case for the TOD based hosts was thus established.