Catalytic application of zinc complex of oxygen depleted 1,3-bis(pyrazole)-p-tert-butylcalix[4]arene

“…Metal complexes of calixarenes have received immense attention in the field of catalysis. − The utilization of a properly designed ligand plays a very important role in the polymerization of LA . Much work has been carried out by using transition-metal complexes of calixarenes, which have proved to be very effective toward the LA polymerization. − Here we will discuss the synthesis and application of some calixarene metal complexes in the ROP of LA.…”

Section: Calixarene-metal Complexes In Ropmentioning

confidence: 99%

Calixarene-Metal Complexes in Lactide Polymerization: The Story so Far

et al. 2023

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Polylactide synthetic procedures have lately gained attention, possibly due to their biocompatibility and the environmental problems associated with fossil-fuel-based polymers. Polylactides can be obtained from natural sources such as cassava, corn, and sugar beet, and polylactides can be manufactured in a laboratory using a variety of processes that begin with lactic acid or lactide. One of the most effective synthetic pathways is through a Lewis acid catalyzed ring-opening polymerization of lactides to obtain a well-defined polymer. In this regard, calixarenes, because of their easy functionalization and tunable properties, have been widely considered to be a suitable 3D molecular scaffold for new metal complexes that can be used for lactide polymerization. This review summarizes the progress made in applying some metalcalixarene complexes in the ring-opening polymerization of lactide.

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“… 17 Recently biomimetic and coordination studies of this ligand 1 with some transition and noble metals have been reported. 12 , 18 , 19 …”

Section: Introductionmentioning

confidence: 99%

“…The BPC ligand 1 is particularly interesting since its structure mimics the His 2 -Tyr 2 coordination sphere of enzymes such as galactose oxidase . Recently biomimetic and coordination studies of this ligand 1 with some transition and noble metals have been reported. ,, …”

Section: Introductionmentioning

confidence: 99%

“…17 Recently biomimetic and coordination studies of this ligand 1 with some transition and noble metals have been reported. 12,18,19 Group 4 metal complexes have gained significant attention due to their low cost, high catalytic activity, easy availability, and low toxicity. 20−24 Zr(IV) complexes are known to show higher coordination numbers and are more milder Lewis acids than Ti(IV) complexes, and thus often show better selectivity.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synthesis of a Zirconium Complex of an N,O-type p-tert-Butylcalix[4]arene and Its Application in Some Multicomponent Reactions

et al. 2022

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The synthesis and characterization of a new octahedral Zr(IV) complex of oxygen-depleted N , O -type calixarene ligand comprising two distal-functionalized pyrazole rings have been reported. The cone shape and structure of the prepared complex were confirmed univocally by single-crystal X-ray diffraction and NMR studies. The Zr metal lies at 2.091 Å from the plane of the calixarene ring. This complex has been utilized as an efficient catalyst for the synthesis of Biginelli adducts, bis(indolyl)methanes, and coumarins. This complex (Cl 2 Zr–calixarene) showed superior activity for these multicomponent reactions in comparison to the corresponding Ti(IV) and Zn(II) analogues. Ferrocene-appended bis(indolyl)methane, prepared using this catalyst, was also evaluated for its anticancer activity against the A-172 cell line.

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Catalytic application of zinc complex of oxygen depleted 1,3-bis(pyrazole)-p-tert-butylcalix[4]arene

Cited by 7 publications

References 50 publications

Metallocalix[n]arenes in catalysis: A 13-year update

Metallocalix[n]arenes in catalysis: A 13-year update

Calixarene-Metal Complexes in Lactide Polymerization: The Story so Far

Synthesis of a Zirconium Complex of an N,O-type p-tert-Butylcalix[4]arene and Its Application in Some Multicomponent Reactions

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