Photoinduced Single Electron Reduction of the 4‐O‐5 Linkage in Lignin Models for C‐P Coupling Catalyzed by Bifunctional N‐Heterocyclic Carbenes

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: Aug. 5, 2024

Abstract Catalytic activation of C aryl ‐O bonds is considered as a powerful strategy for the production aromatics from lignin. However, due to high reduction potentials diaryl ether 4‐O‐5 linkage models, their single electron remains daunting challenge. This study presents blue light‐induced bifunctional N‐heterocyclic carbene (NHC)‐catalyzed one‐electron models synthesis trivalent phosphines. The H‐bond between newly devised NHC and ethers responsible success transfer. Furthermore, this approach demonstrates selective unsymmetric ethers, oligomeric phenylene oxide, lignin model.

Language: Английский

Palladium-Catalyzed Coupling of Aryl Chlorides with Secondary Phosphines to Construct Unsymmetrical Tertiary Phosphines

Organic Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

The functionalization of the C-Cl bond in unactivated aryl chlorides under mild conditions presents a significant challenge. We disclose general protocol for constructing both partially and entirely unsymmetrical tertiary phosphines through Pd/keYPhos-catalyzed coupling with secondary conditions. reaction exhibits excellent functional group tolerance broad substrate scopes. Furthermore, rapid synthesis ligands luminescent compound sTPPs, alongside gram-scale systhesis, demonstrates practical applicability this method.

Language: Английский

Photoinduced, Redox-Neutral Decyanative and Defluorinative Phosphination of (Hetero)Arenes

Organic Letters, Journal Year: 2024, Volume and Issue: 26(38), P. 8154 - 8158

Published: Sept. 16, 2024

Triarylphosphines play a crucial role in organic synthesis as versatile components serving ligands, catalysts, and reactants. This study introduces metal-free, visible-light-induced method for the cross-coupling of cyanopyridines or polyfluoroarenes with diarylphosphines. approach facilitates formation C(sp

Language: Английский