Dual Kinetic Control of Polycarbonate Sequences via Breaking Catalysis Symmetry Using Dual Biomimetic Organoboron Catalysts

Macromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Biomimetic catalysis is extensively used in chemical synthesis targeting to achieve satisfactory reactivities. However, artificial catalysts possessing outstanding sequence controllability over macromolecular structures that could be precisely achieved nature remain scarce, especially the preparation of complex macromolecules featuring kinetically trapped structures. Herein, we report a dual biomimetic catalyst design for precise regulation controlled CO2/epoxide copolymerization. The as-synthesized dissymmetric organoboron possess microenvironments, which differentiate transfer rates polymer alkoxy anions between two boron centers, thus enabling regulation. Consequently, high −ABB–/–AB– ratio 92% was achieved, up 3.3 times analogous symmetric (Nat. Synth. 2022, 1, 892–901). Detailed mechanistic studies reveal kinetic modulations are responsible This tactic should inspire effective designs transformations.

Language: Английский

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Recent Advances in Zinc‐Catalyzed Carbon‐Heteroatom Bond Formation

European Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Abstract Zinc has been an overlooked metal in catalysis for many years. However, this situation begun to change the last two decades with a number of contributions demonstrating that zinc salts and complexes are able catalyze transformations typically accomplished catalysts based on precious transition metals. The development such zinc‐catalyzed methodologies is highly appealing because, general, easily available, inexpensive less toxic. This review aims present most recent relevant examples use formation carbon‐heteroatom bonds, which very important process synthetic organic chemistry.

Language: Английский

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Zinc-Catalyzed Carbon Dioxide Based Biodegradable Polycarbonate Synthesis

Synthesis, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 12, 2025

Abstract Carbon dioxide based degradable polycarbonate can be obtained through the copolymerization reaction of carbon with epoxide in presence a catalyst. This polymer has attracted much attention recent years owing to its environmentally friendly and sustainable characteristics, excellent material properties. Due unique properties, CO2-based wide range applications many fields such as electronic electrical parts, automotive medical devices, aerospace equipment, power radiation protection products. Therefore, numerous catalytic systems have been explored for CO2/epoxide process, which zinc catalyst longest history greatest variety. In this short review, significant advances catalysts transformation CO2 are demonstrated, covering both heterogeneous homogeneous catalysts. Moreover, benefits drawbacks system described, outlook large-scale industrial applicati ons future is also represented. 1 Introduction 2 Heterogeneous Zinc Catalysts 3 Homogeneous 4 Overview 5 Conclusion

Language: Английский

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One-step synthesis of epoxy/cyclic carbonate bifunctional polycarbonates with functional groups

Carbon Capture Science & Technology, Journal Year: 2025, Volume and Issue: unknown, P. 100400 - 100400

Published: March 1, 2025

Language: Английский

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Chemically and Mechanically Recyclable Vitrimers from Carbon Dioxide-Based Polycarbonates

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Language: Английский

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Dual-active-site engineering of urea-based ionic polymer towards enhanced synergistic catalytic performance of carbon dioxide fixation

Separation and Purification Technology, Journal Year: 2025, Volume and Issue: unknown, P. 132765 - 132765

Published: March 1, 2025

Language: Английский

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Transition-metal-free regioselective synthesis of spiro-oxazolidines through [3 + 2] annulation reactions of azadienes with haloalcohols

RSC Advances, Journal Year: 2025, Volume and Issue: 15(14), P. 10634 - 10638

Published: Jan. 1, 2025

The transition-metal-free regioselective [3 + 2] annulation of azadienes with haloalcohols for the preparation highly functionalized spiro-oxazolidines is experimentally simple, broad substrate scope, good yields, and excellent regioselectivity.

Language: Английский

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Copolymerization of styrene oxide with CO2 via modular optimization of bifunctional organoborane catalysts

European Polymer Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113912 - 113912

Published: April 1, 2025

Language: Английский

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Comprehensive Insights into Carbonic Anhydrase Inhibition: A Triad of In vitro, In silico, and In vivo Perspectives

Enzyme and Microbial Technology, Journal Year: 2025, Volume and Issue: 189, P. 110657 - 110657

Published: April 17, 2025

Language: Английский

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N-Triflylation Enables δ-Valerolactam-Epoxide Alternating Copolymerization

ACS Macro Letters, Journal Year: 2025, Volume and Issue: unknown, P. 597 - 602

Published: April 27, 2025

δ-Valerolactam (VL), a six-membered cyclic amide, is easily accessible but hardly polymerizable, unlike other-membered homologues. We have discovered that simple N-triflylation effectively activates VL for undergoing copolymerization with epoxides. The strong electron-withdrawing triflyl group allows mild organobases, in cooperation triethyl borane and an alcohol initiator, to trigger the reaction at room temperature, affording strictly alternating poly(ester-sulfonamide) controlled molar mass low dispersity. method proven applicable variety of epoxides, regardless polarity bulkiness substituents, products exhibit good chemical degradability, thermal/enzymatic stability, wide range glass transition temperatures. study indicates N-sulfonylation ring-opening (alternating) together may build up versatile platform support design construction heteroatom-rich polymers using conventionally nonpolymerizable compounds.

Language: Английский

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