Cleft type receptors for butenolides based on chromenone derivatives
作者:César Raposo、Marta Almaraz、Nieves Pérez、Mercedes Martín、Volker Weinrich、Manuel Grande、MaCruz Caballero、Joaquín R. Morán
DOI:10.1016/0040-4039(96)00045-7
日期:1996.2
A chromenone building block is suitable for the preparation of H-bonding lactone receptors. Combination of this fragment with a second chromenone provides a new cleft suitable for strongly association of γ-hydroxymethyl-γ-lactones.
作者:César Raposo、Nieves Pérez、Marta Almaraz、Ma Luisa Mussons、Ma Cruz Caballero、Joaquín R. Morán
DOI:10.1016/0040-4039(95)00458-o
日期:1995.5
A cyclohexane tricarboxylic acid is shown to be a good spacer for phosphate guests. The combination of 8-aminochromenone-2-carboxamide groups with the cyclohexane spacer leads to a versatile receptor which sets six hydrogen bonds with either phosphonic acids or phosphates. Large association constants are obtained for this receptor in DMSO and methanol when tetraalkylammonium phosphates are used as guests.