Results 81 to 90 of about 20,544 (289)

Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries

Angewandte Chemie, EarlyView.
This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho, Al Vicente Riano D. Lisboa, Juntao Sun, Taeho Kang, Keary M. Engle   +4 more
wiley   +2 more sources

Ruthenium/NHC-catalyzed tandem benzylic oxidation/oxidative esterification of benzylic alcohols with phenols

Catalysis Communications, 2012
Abstract An efficient methodology to access benzoate derivatives via tandem benzylic oxidation/oxidative esterification of benzylic alcohols with phenols catalyzed by ruthenium/NHC was developed. This operationally simple one-pot process uses O 2 as the clean oxidant, producing esters in good to excellent yields.
Di Zhang, Changduo Pan
openaire   +1 more source

Kinetics of oxidation of benzyl alcohol with dilute nitric acid

, 2005
The oxidation of benzyl alcohol by dilute nitric acid has been selected for the study as a typical method for the manufacture of industrially important intermediate benzaldehyde. All the reactions have been performed in the absence of any solvent.
Joshi, Sudhir R., Kataria, Kamal L., Sawant, Sudhirprakash B., Joshi, Jyeshtharaj B.   +3 more
core   +1 more source

ZrO2 Aerogel‐Supported Pd Nanoparticles for Photothermal CO2 Reduction

Advanced Science, EarlyView.
Nanoparticle‐based aerogels are promising catalysts for photothermal reactions due to optical transparency, high surface area, and low thermal conductivity. Here, we present deposition of Pd nanoparticles on ZrO2 aerogel granules by a wet‐impregnation approach.
David Kiwic, Linard Räz, Elena Tervoort, Markus Niederberger   +3 more
wiley   +1 more source

Catalytic Enantioselective Intramolecular Aza‐Michael Addition to α,β‐Unsaturated Esters

Angewandte Chemie, EarlyView.
A general method for accessing enantioenriched saturated N‐heterocycles via a catalytic enantioselective intramolecular aza‐Michael reaction to α,β‐unsaturated esters is described. A superbasic bifunctional iminophosphorane (BIMP) catalyst was key to enabling reactivity of the high pKa sulfonamide pronucleophile, whilst delivering good to excellent ...
Evan G. W. Rutter, Cameron J. MacRae, Haoran Xiong, Daniel Rozsar, Katherine F. P. Clarke, Darren J. Dixon   +5 more
wiley   +2 more sources

Zirconium Doped Tunnel Structure Manganese Oxide OMS-2 Catalysts

Eurasian Chemico-Technological Journal, 2004
Zirconium doped tunnel structure manganese oxide (OMS-2) materials were synthesized by reflux and impregnation methods by adopting suitable synthetic conditions.
Rajabathar Jothiramalingam, Balasubramanian Viswanathan, Thirukkallam K. Varadarajan   +2 more
doaj   +1 more source

Single‐Atom Iron‐Catalyzed Oxidative Esterification: From Methylarenes to the Upcycling of Polystyrene and Lignin‐Derived Feedstocks

Angewandte Chemie, EarlyView.
Heterogeneous iron‐catalyzed environmentally benign and sustainable CH‐oxidative esterification methodology has been developed for the synthesis of esters. This challenging reaction has been achieved by the rational design of specific single atom iron‐based catalyst with Fe‐N4 active centers, which empowered the oxidative esterification of methyl and ...
Zhuang Ma, Binyu Zhang, Hui Yang, Yue Hu, Junzheng Yu, Yanbin Cui, Jun Zhao, Matthias Beller, Rajenahally V. Jagadeesh   +8 more
wiley   +2 more sources

Conjugated dual size effect of core-shell particles synergizes bimetallic catalysis

Nature Communications, 2023
Tailoring both the core size and shell thickness of core-shell bimetallic nanocatalysts to the dedicated geometrical and electronic properties are vital for catalytic performance optimization.
Xiaohui Zhang, Zhihu Sun, Rui Jin, Chuwei Zhu, Chuanlin Zhao, Yue Lin, Qiaoqiao Guan, Lina Cao, Hengwei Wang, Shang Li, Hancheng Yu, Xinyu Liu, Leilei Wang, Shiqiang Wei, Wei-Xue Li, Junling Lu   +15 more
doaj   +1 more source

Tuning the Synthesis of Manganese Oxides Nanoparticles for Efficient Oxidation of Benzyl Alcohol

Nanoscale Research Letters, 2017
The liquid phase oxidation of benzyl alcohol is an important reaction for generating benzaldehyde and benzoic acid that are largely required in the perfumery and pharmaceutical industries. The current production systems suffer from either low conversion or over oxidation.
Fei, Jingyuan, Sun, Lixian, Zhou, Cuifeng, Ling, Huajuan, Yan, Feng, Zhong, Xia, Lu, Yuxiang, Shi, Jeffrey, Huang, Jun, Liu, Zongwen   +9 more
openaire   +2 more sources

Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies

Journal of Chemistry, 2019
The catalytic activity of various Keggin polyoxometalate catalysts has been investigated in the gas-phase partial oxidation of toluene to produce benzyl alcohol and benzaldehyde. The catalyst systems HPMo12O40, HPMo11VO40, FePMo12O40, and PMo11FeO39 were
Allam Djaouida, Mansouri Sadia, Hocine Smaïn   +2 more
doaj   +1 more source