Synthesis and properties of functionalized Schiff bases of 5α,10α-di(4-hydroxylphenyl)calix[4]pyrrole and 5α,15β-di(4-hydroxylphenyl)c
文摘
A series of calix[4]pyrrole meso-substituted Schiff bases was synthesized with 5α,10α-di(4-hydroxylphenyl)calix[4]pyrrole or 5α,15β-di(4-hydroxylphenyl)calix[4]pyrrole as starting material. The synthetic routes included alkylation with methyl α-chlroroaceate, ammonolysis with alkylene diamine, and condensation with salicylladehyde or 2-hydroxynaphthaldehyde. The crystal structures of the new calix[4]pyrroles and their Schiff bases were determined by X-ray diffraction. The coordination properties of the representative calix[4]pyrrole Schiff bases to transition metal ions were also investigated by UV-Vis spectra.