Aerobic Copper-Catalyzed Synthesis of Benzimidazoles from Diaryl- and Alkylamines via Tandem Triple C–H Aminations DOI
Taoyuan Liang, Zhenda Tan, He Zhao

et al.

ACS Catalysis, Journal Year: 2018, Volume and Issue: 8(3), P. 2242 - 2246

Published: Feb. 6, 2018

Through radical-induced tandem triple C–H aminations with free amines as the aminating agents, we herein present a precedent on aerobic copper-catalyzed synthesis of 5-diarylamino benzimidazoles, class optoelectronic device analogues by combining two molecules diarylamines and one molecule alkylamine in single operation. The developed chemistry proceeds merits natural abundant copper/O2 catalyst system, readily available feedstocks, broad substrate scope, good functional group tolerance, exclusive regio- chemoselectivity, high step atom efficiency, which offers an important basis for further construction products that are inaccessible or difficult to prepare existing methods employing catalytic amination strategy.

Language: Английский

Iridium Supported on Phosphorus‐Doped Porous Organic Polymers: Active and Recyclable Catalyst for Acceptorless Dehydrogenation and Borrowing Hydrogen Reaction DOI
Wei Yao, Zheng‐Chao Duan, Yilin Zhang

et al.

Advanced Synthesis & Catalysis, Journal Year: 2019, Volume and Issue: 361(24), P. 5695 - 5703

Published: Oct. 22, 2019

Abstract Iridium‐on‐phosphorus‐doped porous organic polymers (POP−Ir) were developed by anchoring simple iridium onto the skeleton of through coordination bonds. This POP−Ir catalyst, which was thoroughly characterized means EDS, SEM, TEM, XRD, XPS, and FT‐IR, revealed excellent catalytic activity for reaction diphenyl phosphinamide with benzyl alcohols borrowing hydrogen strategy acceptorless dehydrogenation wide functional group tolerance. Moreover, this catalyst could be simply recovered reused at least five times without a significant loss activity, considerable application prospects. The mechanism investigated to further understand system transformations. Overall, has shown high reusability in between phosphinamides alcohols. magnified image

Language: Английский

Citations

43
Rhodium catalysed C-3/5 methylation of pyridines using temporary dearomatisation DOI Creative Commons
Alexandru Grozavu, Hamish B. Hepburn,

Elliot P. Bailey

et al.

Chemical Science, Journal Year: 2020, Volume and Issue: 11(32), P. 8595 - 8599

Published: Jan. 1, 2020

Electron poor pyridines can be activated by reduction and then methylated at C3/5 using formaldehyde.

Language: Английский

Citations

42
M–N–C materials as heterogeneous catalysts for organic transformations DOI
Kefeng Ping,

Rohit Bhadoria,

Pavel Starkov

et al.

Coordination Chemistry Reviews, Journal Year: 2023, Volume and Issue: 497, P. 215412 - 215412

Published: Sept. 17, 2023

Language: Английский

Citations

15
Design and Synthesis of Zirconium‐Containing Coordination Polymer Based on Unsymmetric Indolyl Dicarboxylic Acid and Catalytic Application on Borrowing Hydrogen Reaction DOI
Xinyu Hu, Haiyan Zhu,

Xinxin Sang

et al.

Advanced Synthesis & Catalysis, Journal Year: 2018, Volume and Issue: 360(22), P. 4293 - 4300

Published: Aug. 28, 2018

Abstract Catalytic borrowing hydrogen reaction is a very attractive transformation in the field of C‐alkylation reaction. In this work, new Zr (Zirconium)‐containing coordination polymer containing unsymmetric indolyl dicarboxylic acid 1‐(carboxymethyl)‐1H‐indole‐5‐carboxylic (H 2 CIA) was synthesized by way solvothermal synthetic route and characterized powder X‐ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), Nitrogen adsorption‐desorption, fourier transform infrared spectroscopy photoelectronic (XPS). The Zr‐CIA employed as catalyst for acetophenone derivatives presence benzyl alcohol. addition, also observed to be effective alcohols with high yields alkylation products were achieved. Mechanism investigations conducted better understand catalysts transformations. Meanwhile, could reused at least five times without notable decrease activity selectivity. magnified image

Language: Английский

Citations

44
Aerobic Copper-Catalyzed Synthesis of Benzimidazoles from Diaryl- and Alkylamines via Tandem Triple C–H Aminations DOI
Taoyuan Liang, Zhenda Tan, He Zhao

et al.

ACS Catalysis, Journal Year: 2018, Volume and Issue: 8(3), P. 2242 - 2246

Published: Feb. 6, 2018

Through radical-induced tandem triple C–H aminations with free amines as the aminating agents, we herein present a precedent on aerobic copper-catalyzed synthesis of 5-diarylamino benzimidazoles, class optoelectronic device analogues by combining two molecules diarylamines and one molecule alkylamine in single operation. The developed chemistry proceeds merits natural abundant copper/O2 catalyst system, readily available feedstocks, broad substrate scope, good functional group tolerance, exclusive regio- chemoselectivity, high step atom efficiency, which offers an important basis for further construction products that are inaccessible or difficult to prepare existing methods employing catalytic amination strategy.

Language: Английский

Citations

43