Versatile photoluminescence behavior of polycyclic hydroxybenzimidazoles driven by intermolecular hydrogen bonding DOI
Dancho Yordanov,

Rastislav Smolka,

Martin Vala

et al.

Optical Materials, Journal Year: 2024, Volume and Issue: 157, P. 116274 - 116274

Published: Oct. 13, 2024

Language: Английский

Visible-light-promoted radical cyclisation of unactivated alkenes in benzimidazoles: synthesis of difluoromethyl- and aryldifluoromethyl-substituted polycyclic imidazoles DOI Creative Commons
Yuan‐Ping Pang, Jinglan Yan, Nawaf Al‐Maharik

et al.

Beilstein Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: 21, P. 234 - 241

Published: Jan. 30, 2025

An efficient and eco-friendly approach for synthesizing difluoromethyl- aryldifluoromethyl-substituted polycyclic imidazoles was established via a visible-light-promoted radical cyclization reaction. This method employed the readily accessible inexpensive CF 2 HCO H or PhCF COOH, along with benzimidazoles bearing unactivated alkenes PhI(OAc) as substrates, proceeded without need of any base, metal catalyst, photocatalyst additive. In total, 24 examples were examined, all them successfully underwent reaction to produce target products in good excellent yields. Mechanistic studies revealed that proceeds pathway.

Language: Английский

Citations

1
Photo-induced decarboxylative radical cascade cyclization of unactivated alkenes: access to CF- and CF2-substituted ring-fused imidazoles DOI Creative Commons
Hui-Nan Wang, Shaohui Lin, Hui Hong

et al.

RSC Advances, Journal Year: 2025, Volume and Issue: 15(16), P. 12739 - 12745

Published: Jan. 1, 2025

A mild and effective visible-light-induced decarboxylative radical cascade reaction of olefin-containing imidazoles α-fluorinated carboxylic acids, has been developed to afford monofluoromethylated or aryldifluoromethylated polycyclic imidazoles.

Language: Английский

Citations

0
Photoredox-catalysed Radical Difluoromethylation/Cyclization of N-Acryloyl-2-arylbenzimidazole to Access CF2H-Substituted Benzimidazo[2,1-a]isoquinolin-6(5H)-ones DOI
Jinwei Yuan,

Hongzhao Qu,

Wenfeng Jia

et al.

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

A convenient visible-light-promoted difluoromethylation/cyclization reaction to access various difluoromethylated benzo[4,5]imidazo[2,1- a ]isoquinolin-6(5 H )-ones was developed using [Ph 3 PCF 2 H] + Br − as reagent.

Language: Английский

Citations

1
Electrophotocatalytic Thiocyanation and Sulfonylation Cyclization of Unactivated Alkenes DOI
Yingchun Ma,

Ping Yu,

Ruoyu Qin

et al.

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

We report an electrophotocatalytic process that enables the thiocyanation and sulfonylation/cyclization of alkenes. It is applicable to a wide range unactivated alkenes, using inexpensive photocatalyst 2,4,6-triphenylpyrylium tetrafluoroborate (TPPT) produce diverse array heterocycles containing sulfonyl thiocyano groups with good functional group tolerance. The protocol operates under mild, chemical oxidant- transition-metal-free, broad scope substrates. Preliminary mechanistic studies suggest reaction involves combination electrolysis reductive quenching photocatalytic cycle TPPT.

Language: Английский

Citations

1
Versatile photoluminescence behavior of polycyclic hydroxybenzimidazoles driven by intermolecular hydrogen bonding DOI
Dancho Yordanov,

Rastislav Smolka,

Martin Vala

et al.

Optical Materials, Journal Year: 2024, Volume and Issue: 157, P. 116274 - 116274

Published: Oct. 13, 2024

Language: Английский

Citations

0