C(sp3)–heteroatom bond formation by iron-catalyzed soft couplings

Communications Chemistry, Journal Year: 2025, Volume and Issue: 8(1)

Published: March 8, 2025

Carbon–heteroatom bonds are of great importance due to their prevalence in pharmaceuticals, agrochemicals, materials, and natural products. Despite the effective use metal-catalyzed cross-coupling reactions between sp2-hybridized organohalides soft heteroatomic nucleophiles for carbon–heteroatom bond formation, sp3-hybridized remain limited coupling with thiols remains elusive. Here, we report benzyl or tertiary halides thiol catalyzed by iron extend utility alcohol amine nucleophiles. The reaction is broad substrate scope both partners applicable construction congested tri- tetrasubstituted carbon centers as well β-quaternary synthetic further emphasized gram-scale synthesis rapid herbicide library synthesis. Overall, provide an efficient method prepare pharmaceutically materially relevant expanding iron-catalyzed organic chemistry, however, approaches access substrates limited. authors thiol,

Language: Английский

---

Reactivity ratio study for the cationic copolymerization of vinyl ethers with 2,3-dihydrofuran

Journal of Macromolecular Science Part A, Journal Year: 2025, Volume and Issue: 62(2), P. 135 - 141

Published: Jan. 5, 2025

To understand the monomer distribution in copolymers from cationic copolymerization of vinyl ethers (VEs) with 2,3-dihydrofuran (DHF), reactivity ratios VEs (rVE) and DHF (rDHF) were determined. The copolymer compositions calculated 1H NMR spectroscopy, which used to determine extended Kelen-Tüdós (extended K-T) method at high conversion. Furthermore, effect solvent (hexane toluene), temperature (0, −20, −40 °C), Lewis acid (SnCl4 TiCl4) alkyl groups VE monomers (iso-butyl ether (iBVE), propyl (PVE), n-butyl (nBVE)) studied detail on during DHF. two every case randomly placed along chain. This article demonstrates scope synthesis their microstructure analysis.

Language: Английский

---

Cationic copolymerization of isobutylene and bio-renewable β-myrcene towards sustainable elastomers: synthesis and mechanism

Journal of Polymer Research, Journal Year: 2025, Volume and Issue: 32(3)

Published: Feb. 25, 2025

Language: Английский

---

The Chemistry of Behind the UV-Curable Nail Polishes

Polymers, Journal Year: 2025, Volume and Issue: 17(9), P. 1166 - 1166

Published: April 25, 2025

As far as history tells, people have set efforts both to improve the conditions and change visual outfit of skin, nails, hair. The first information on nail cosmetics is found in ancient China Egypt, where various nature-derived compositions were used for changing colour nails. Nowadays more mechanically chemically durable systems polishes are elaborated. This review focuses latest achievements field UV-curable polishes. Herein, polymerization mechanisms (acrylates, well epoxides thiols) occurring described. Besides plausible side reactions process characterized. Thus, main drawbacks forming a uniform, perfect layer illuminated. For effective curing, choice photoinitiators may be crucial; thus, types their advantages disadvantages Ensuring adhesion between substrate (human nail) polymer film one challenges polish industry—thus interactions promoters keratin Regarding film-forming agents, comprehensive overview composition traditional UV-curing provided, but emphasis devoted alternative, agents that could introduce renewable resources into cosmetics. Additionally, this gives short insight innovations cosmetics, like (1) with improved pealability, (2) covalently polymer-bonded dyes photoinitiators, thus reducing release low-molecular compounds or degradation products, (3) delivery treatment medicine.

Language: Английский

---

Combining photocontrolled-cationic and anionic-group-transfer polymerizations using a universal mediator: enabling access to two- and three-mechanism block copolymers

Chemical Science, Journal Year: 2024, Volume and Issue: 15(33), P. 13523 - 13530

Published: Jan. 1, 2024

The first example of poly(vinyl ether)- block -poly(thiirane)- -poly(acrylamide) from sequentially combining photocontrolled cationic, thioacyl anionic group transfer, and radical polymerization with no intermediate end-group manipulation steps.

Language: Английский

---

Functionalized Polyisobutylene and Polyisobutylene‐Based Block Copolymers by Mechanistic Transformation from Cationic to Radical Process

Macromolecular Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

Abstract The strategy for the preparation of polyisobutylene‐based block copolymers via mechanistic transformation from cationic to radical polymerization is reported. This involves synthesis 2‐bromo‐2‐methylpropanoyl‐terminated difunctional polyisobutylene macroinitiator (BiBB‐PIB‐BiBB) consecutive polymerization, in situ hydroxyl‐terminated and its acylation by 2‐bromo‐2‐methylpropanoyl bromide. Mn 2 (CO) 10 −triggered photo‐induced styrene bulk using this leads formation multiblock copolymer, while predominantly triblock copolymer generated during methyl methacrylate. possibility functionalize pyrene addition 1‐bromomethyl presence also demonstrated work.

Language: Английский

---

Cationic Polymerization of Vinyl Ethers using Trifluoromethyl Sulfonate/Solvent/Ligand to Access Well-controlled Poly(vinyl ether)s

Chemical Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 9, 2024

Cationic polymerization of vinyl ethers to access poly(vinyl ether) polymeric materials has been challenging due stringent conditions and inevitable chain transfer. Herein we introduce a protocol using trifluoromethyl sulfonates catalyze the series ethers. These are fully commercially available can be stored under ambient conditions. Solvents ligands have profound influences on process, ether)s with different molecular weights, weight distributions, tacticities were obtained. A few combinations sulfonate/solvents/O^O type explored. They showed high activities afforded well-controlled tacticity, which isotacticity up 81%

Language: Английский

---

Base-Free Fluoride-Mediated Vinylation of Alcohols with Calcium Carbide

Russian Journal of General Chemistry, Journal Year: 2024, Volume and Issue: 94(12), P. 3155 - 3163

Published: Dec. 1, 2024

Language: Английский

---