Synthesis, characterization and electrochemical properties of two new calix[4]arene derivatives bearing two ferrocene imine or ferrocene amine units at the upper rim

New calix[4]arenedimethacrylate derivatives for dental composites

“…The starting material p ‐ tert ‐butylcalix[4]arene 1 19 and its 1,3‐ O ‐ alkylated derivatives 5,11,17,23‐tetra‐ tert ‐butyl‐25,27‐dipropoxy‐26,28‐dihydroxycalix[4]arene ( 11a ), 5,11,17,23‐tetra‐ tert ‐butyl‐25, 27‐dibutoxy‐26,28‐dihydroxycalix[4]arene ( 11b ), 5,11,17,23‐tetra‐ tert ‐butyl‐25,27‐dioctyloxy‐26,28‐dihydroxycalix[4]arene ( 11c ), 5, 11,17,23‐tetra‐ tert ‐butyl‐25,27‐diethoxyethoxy‐26,28‐dihydroxy‐ calix[4]arene ( 11d ) and 5,11,17,23‐tetra‐ tert ‐butyl‐25,27‐di‐ ethoxyethoxymethane‐26,28‐dihydroxycalix[4]arene ( 11e ) were prepared using established literature procedures 20–25…”

Cyrhetrenylaniline and new organometallic phenylimines derived from 4- and 5-nitrothiophene: Synthesis, characterization, X-Ray structures, electrochemistry and in vitro anti- T. brucei activity

“…As part of our continued interest in the study on the electronic influence of the organometallic groups into hybrid organic-organometallic imines compounds with potential antiparasitic activity, we decided to form new Schiff bases containing a [-C 6 H 4 -N=CH-] bridge between the organometallic entity and 4-and 5-nitro-2-thiophenyl groups. To do that we inspired on the several reports dealing with imines derived from ferrocenylanilines, which have proved to be excellent and versatile building blocks with the ability to produce several compounds with interesting electrochemical [54], antimicrobial [55][56][57][58], antioxidant [59] and antitumoral properties [60,61]. On the other hand, we selected the nitro-thiophenyl group substituted into the 4-and 5-position because they allowed us to compare the reduction potential of the nitro group and the anti-T. brucei activity.…”

Novel organometallic chalcones functionalized with a crown ether fragment as optical ion chemosensors

“…In this context, Shaabani et al . reported the synthesis, characterization and electrochemical properties of calix[4]arene functionalized with a ferrocenyl moiety linked by imine and amine units at the upper rim . Electrochemical studies showed that these redox‐active ligands electrochemically recognize trivalent lanthanide (La 3+ , Ce 3+ ), Pb 2+ and Cu 2+ ions.…”

“…In this context, Shaabani et al reported the synthesis, characterization and electrochemical properties of calix [4]arene functionalized with a ferrocenyl moiety linked by imine and amine units at the upper rim. [5] Electrochemical studies showed that these redox-active ligands electrochemically recognize trivalent lanthanide (La 3+ , Ce 3+ ), Pb 2+ and Cu 2+ ions. Several organometallic complexes functionalized with macrocycles linked by an organic moiety have been developed for anion and metal ion quantification exhibiting selectivity of responses in infrared, NMR and UV-visible-based read-out methods.…”