Synthesis and properties of functionalized Schiff bases of 5α,10α-di(4-hydroxylphenyl)calix[4]pyrrole and 5α,15β-di(4-hydroxylphenyl)calix[4]pyrrole
Ying Han , Juanjuan Sun , Genliang Wang , Chaoguo Yan
Chemical Research in Chinese Universities ›› 2014, Vol. 30 ›› Issue (6) : 919 -924.
Synthesis and properties of functionalized Schiff bases of 5α,10α-di(4-hydroxylphenyl)calix[4]pyrrole and 5α,15β-di(4-hydroxylphenyl)calix[4]pyrrole
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.
Calix[4]pyrrole / Schiff base / Macrocycle / Crystal structure / UV-Vis spectroscopy
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