Non-classical effective methods for reduction of heteroaromatic compounds DOI
Yu. Yu. Titova, А. В. Иванов

Russian Chemical Reviews, Journal Year: 2024, Volume and Issue: 93(11), P. RCR5149 - RCR5149

Published: Oct. 30, 2024

The review summarizes the known data on various methods for saturation and dearomatization of heterocyclic moieties, forming diverse aromatic compounds. Since classical hydrogenation substrates with molecular hydrogen has a number fundamental drawbacks that hinder both its use at laboratory level widespread implementation in industrial production, main attention is paid to non-classical described literature over last 20–25years. ammonia-free Birch reduction, transfer hydrogenation, reduction by Hantzsch esters some other reactions involving compounds are summarized systematized. It shown such or heterocycles can cases be more efficient than procedures.<br> bibliography includes 173 references.

Language: Английский

Construction of a Dual-Functionalized Acid–Base Nanocatalyst via HEPES Buffer Functionalized on Fe3O4 as a Reusable Catalyst for Annulation Reactions DOI

Maryam Borzooei,

Masoomeh Norouzi, Masoud Mohammadi

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 40(26), P. 13397 - 13411

Published: June 20, 2024

Herein, we present a highly efficient dual-functionalized acid–base nanocatalyst, denoted as Fe3O4@GLYMO-HEPES, featuring sulfuric acid and tertiary amines its dual functional components. This catalyst is synthesized through the immobilization of 4-(2-hydroxyethyl)-1-piperazineethanesulfonic (HEPES) source these functionalities onto magnetite (Fe3O4) using 3-glycidoxypropyltriethoxysilane (GLYMO) linker. Characterization studies confirm integrity Fe3O4 core, with GLYMO-HEPES coating exhibiting no phase changes. Furthermore, Fe3O4@GLYMO-HEPES nanoparticles demonstrate uniform size distribution without aggregation. Notably, exhibits remarkable stability up to 200 °C possesses saturation magnetization value 31.5 emu/g, facilitating easy recovery via magnetic separation. These findings underscore potential versatile recyclable nanocatalyst for various applications. Its catalytic ability was evaluated in synthesis pyrano[2,3-c]pyrazoles 2-amino-3-cyano-4H-chromenes tandem Knorr–Knoevenagel–Michael–Thorpe–Ziegler-type heterocyclization mechanism, different aldehydes. A wide range fused heterocycles having good excellent yields. The process cost-effective, safe, sustainable, scalable, can be reused five times. prepared found stable heterogeneous showed recyclability.

Language: Английский

Citations

17
Reconstruction of surface defects in Bi2MoO6 induced by amorphous ZnO for ultra-fast photocatalytic purification of Cr(VI) DOI
Lili Yao, Cheng-zhao Jin,

Xinan Yang

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: 13(3), P. 116553 - 116553

Published: April 11, 2025

Language: Английский

Citations

0
Pd-Catalyzed Transfer Hydrogenation of Alkenes Using Tetrahydroxydiboron as the Sole Hydrogen Donor DOI Creative Commons
Benjamin J. Stokes,

Mahshid Yaghoubi,

Isabella C. Reyes

et al.

SynOpen, Journal Year: 2024, Volume and Issue: 08(03), P. 169 - 172

Published: July 16, 2024

Abstract Tetrahydroxydiboron-mediated catalytic transfer hydrogenations have typically involved co-additives that, like tetrahydroxydiboron itself, are H atom donors. Herein we report an alkene hydrogenation method with as the sole source of atoms. The reaction uses Pd(OAc)2 a convenient putative colloid pre-catalyst, and cyclic monoethers competent solvents. Highly efficient deuteration is demonstrated using tetradeuteroxydiboron.

Language: Английский

Citations

1
Non-classical effective methods for reduction of heteroaromatic compounds DOI
Yu. Yu. Titova, А. В. Иванов

Russian Chemical Reviews, Journal Year: 2024, Volume and Issue: 93(11), P. RCR5149 - RCR5149

Published: Oct. 30, 2024

The review summarizes the known data on various methods for saturation and dearomatization of heterocyclic moieties, forming diverse aromatic compounds. Since classical hydrogenation substrates with molecular hydrogen has a number fundamental drawbacks that hinder both its use at laboratory level widespread implementation in industrial production, main attention is paid to non-classical described literature over last 20–25years. ammonia-free Birch reduction, transfer hydrogenation, reduction by Hantzsch esters some other reactions involving compounds are summarized systematized. It shown such or heterocycles can cases be more efficient than procedures.<br> bibliography includes 173 references.

Language: Английский

Citations

0