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You searched for: Journal name Chemical communications Remove constraint Journal name: Chemical communications Subject chemical reactions Remove constraint Subject: chemical reactions Subject term catalysts Remove constraint Subject term: catalysts Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. Chiral anthranilic pyrrolidine as custom-made amine catalyst for enantioselective Michael reaction of nitroalkenes with carbonyl compounds

Author:
Yukari Oka; Seiji Tsuzuki; Katsuhiko Moriyama
Source:
Chemical communications 2021 v.57 no.87 pp. 11457-11460
ISSN:
1364-548X
Subject:
anthranilic acid; carboxylic acids; catalysts; chemical reactions; enantioselectivity; hydrogen bonding; nitroalkenes; reaction mechanisms
Abstract:
... A chiral anthranilic pyrrolidine catalyst as a custom-made amine-catalyst was developed for the enantio- and diastereo selective Michael reaction of nitroalkenes with carbonyl compounds. In particular, a peptide-like catalyst in which an α-amino acid is attached to the anthranilic acid skeleton induced the high stereoselectivity of the reaction with aldehydes. Studies of the reaction mechanism ind ...
DOI:
10.1039/d1cc04453b

2. A competitive and highly selective 7-, 6- and 5-annulation with 1,3-migration through C–H and N–H – alkyne coupling

Author:
Sk Ajarul; Anirban Kayet; Tanmay K. Pati; Dilip K. Maiti
Source:
Chemical communications 2020 v.56 no.3 pp. 474-477
ISSN:
1364-548X
Subject:
alkynes; catalysts; chemical reactions; iodine; zinc chloride
Abstract:
... We demonstrated a highly competitive and selective C–C and N–C cross-coupled 7-, 6- and 5-annulation utilizing 2-ethynylanilides to afford functionalized 1H-benzo[b]azepin-2(5H)-ones, 2-quinolinones, and 3-acylindoles in high yield. ZnCl₂ was found to be the smart catalyst for 7- and 5-annulation with 1,3-migration through C–H and N–H functionalization, respectively, whereas molecular iodine perfo ...
DOI:
10.1039/c9cc07360d

3. A novel chiral surfactant-type metallomicellar catalyst for asymmetric Michael addition in water

Author:
Xinping Liang; Yang Gui; Kuiliang Li; Jindong Li; Zhenggen Zha; Lei Shi; Zhiyong Wang
Source:
Chemical communications 2020 v.56 no.75 pp. 11118-11121
ISSN:
1364-548X
Subject:
catalysts; chemical reactions; ligands; lipophilicity
Abstract:
... A series of Schiff-based ligands consisting of both tertiary amines and lipophilic groups were designed and synthesized. Using these ligands, a new chiral surfactant-type metallomicellar catalyst was developed in water, and this was identified by SEM/TEM analyses. These metallomicelles can be empolyed in asymmetric Michael addition reactions in water, delivering the corresponding adducts with exce ...
DOI:
10.1039/d0cc04410e

4. A supersalt-type copper(i)-thiolate cluster with applications for mechano/thermochromism and the oxygen evolution reaction

Author:
Lanxia Hu; Aiping Zheng; Yao Kang; Tian Wen; Jian Zhang
Source:
Chemical communications 2020 v.56 no.28 pp. 3967-3970
ISSN:
1364-548X
Subject:
catalysts; catalytic activity; chemical reactions; copper; electrochemistry; luminescence; oxygen production
Abstract:
... A new copper(i)–thiolate (Cu–S) cluster with a CsCl unit (1, [Cu₁₂(μ₄-SCH₃)₆(NH₃)₁₂][Cu₁₂(μ₄-SCH₃)₆Cl₁₂]) exhibited interesting mechanochromic and thermochromic luminescence properties. Additionally, heteroatom-rich 1 could also be used as an electrocatalyst for the oxygen evolution reaction in alkaline media. The supersalt-type Cu–S cluster for the first time realized mechano/thermochromic and el ...
DOI:
10.1039/d0cc00619j

5. Ambient electrochemical NH₃ synthesis from N₂ and water enabled by ZrO₂ nanoparticles

Author:
Tong Xu; Dongwei Ma; Chengbo Li; Qian Liu; Siyu Lu; Abdullah M. Asiri; Chun Yang; Xuping Sun
Source:
Chemical communications 2020 v.56 no.25 pp. 3673-3676
ISSN:
1364-548X
Subject:
ammonia; catalysts; chemical reactions; electrochemistry; electrodes; energy; energy conservation; greenhouse gas emissions; hydrochloric acid; hydrogen; nanoparticles; nitrogen; nitrogen fixation; zirconium oxide
Abstract:
... Industrially, artifical N₂ fixation to NH₃ mainly relies on the Haber–Bosch process which is operated in a harsh environment with large energy consumption and heavy serious greenhouse gas emission. Electrochemical N₂ reduction offers a carbon-neutral and energy-saving method for NH₃ synthesis under ambient conditions. Herein, we demonstrate the first use of ZrO₂ nanoparticles as an earth-abundant ...
DOI:
10.1039/c9cc10087c

6. Cobalt-catalysed selective synthesis of aldehydes and alcohols from esters

Author:
Sandip Pattanaik; Chidambaram Gunanathan
Source:
Chemical communications 2020 v.56 no.53 pp. 7345-7348
ISSN:
1364-548X
Subject:
alcohols; aldehydes; catalysts; catalytic activity; chemical reactions; cobalt; esters; reducing agents; selectivity (chemistry); stoichiometry
Abstract:
... Efficient and selective reduction of esters to aldehydes and alcohols is reported in which a simple cobalt pincer catalyst catalyses both transformations using diethylsilane as a reductant. Remarkably, the reaction selectivity is controlled by the stoichiometry of diethylsilane. ...
DOI:
10.1039/d0cc03076g

7. Copper-catalysed Csp³–Csp cross-couplings between cyclobutanone oxime esters and terminal alkynes induced by visible light

Author:
Binlin Zhao; Yixiao Wu; Yu Yuan; Zhuangzhi Shi
Source:
Chemical communications 2020 v.56 no.34 pp. 4676-4679
ISSN:
1364-548X
Subject:
alkynes; catalysts; catalytic activity; chemical bonding; chemical reactions; cleavage (chemistry); copper; esters; light; nitriles; photosensitivity
Abstract:
... A novel transformation for the construction of Csp³–Csp bonds was achieved via a photo-induced copper-catalysed C–C bond cleavage. This approach was applied to prepare a series of highly functionalized alkynyl nitriles using readily available cyclobutanones and terminal alkynes. Mechanistic exploration showed that the in situ generated copper acetylide complex is an effective photosensitive cataly ...
DOI:
10.1039/d0cc00988a

8. Copper-catalyzed asymmetric silyl addition to alkenyl-substituted N-heteroarenes

Author:
Ya-Li Zeng; Bo Chen; Ya-Ting Wang; Cheng-Yu He; Zi-Yuan Mu; Ji-Yuan Du; Long He; Wen-Dao Chu; Quan-Zhong Liu
Source:
Chemical communications 2020 v.56 no.11 pp. 1693-1696
ISSN:
1364-548X
Subject:
alkenes; catalysts; catalytic activity; chemical reactions; copper; enantioselectivity; ligands
Abstract:
... Asymmetric conjugate addition of PhMe₂SiBPin to a wide range of N-heteroaryl alkenes proceeded in the presence of a copper catalyst coordinated with an easily accessible chiral phosphoramidite ligand to afford useful β-silyl N-heteroarenes in high yields (up to 96%) and excellent enantioselectivities (up to 97% ee). ...
DOI:
10.1039/c9cc08910a

9. Correction: Fullerene C₇₆ as a novel electrocatalyst for VO²⁺/VO₂⁺ and chlorine evolution inhibitor in all-vanadium redox flow batteries

Author:
Farah A. El Diwany; Basant A. Ali; Ehab N. El Sawy; Nageh K. Allam
Source:
Chemical communications 2020 v.56 no.60 pp. 8496
ISSN:
1364-548X
Subject:
batteries; catalysts; chemical reactions; chlorine; electrochemistry; fullerene; vanadyl ions
Abstract:
... Correction for ‘Fullerene C₇₆ as a novel electrocatalyst for VO²⁺/VO₂⁺ and chlorine evolution inhibitor in all-vanadium redox flow batteries’ by Farah A. El Diwany et al., Chem. Commun., 2020, 56, 7569–7572, DOI: 10.1039/D0CC03544K. ...
DOI:
10.1039/d0cc90303e

10. Cucurbiturils in nucleic acids research

Author:
Ekaterina Y. Chernikova; Daria V. Berdnikova
Source:
Chemical communications 2020 v.56 no.98 pp. 15360-15376
ISSN:
1364-548X
Subject:
catalysts; chemical bonding; chemical communication; chemical reactions; drug carriers; macrocyclic compounds; nucleic acids
Abstract:
... During the past ten years, the importance of cucurbiturils (CB[n]) as macrocyclic hosts in supramolecular assemblies with various types of natural and synthetic nucleic acids (NAs) has increased explosively. As a component of such systems, CB[n] macrocycles can play a wide spectrum of roles from drug and gene delivery vehicles to catalysts/inhibitors of biochemical reactions and even building bloc ...
DOI:
10.1039/d0cc06583h

11. Direct synthesis of novel quinoxaline derivatives via palladium-catalyzed reductive annulation of catechols and nitroarylamines

Author:
Feng Xie; Yibiao Li; Xiuwen Chen; Lu Chen; Zhongzhi Zhu; Bin Li; Yubing Huang; Kun Zhang; Min Zhang
Source:
Chemical communications 2020 v.56 no.44 pp. 5997-6000
ISSN:
1364-548X
Subject:
aromatic amines; catalysts; catalytic activity; chemical reactions; palladium; renewable resources; value-added products
Abstract:
... Here, a palladium-catalyzed new hydrogenative annulation reaction of catechols and nitroarylamines, allowing straightforward access to two classes of novel quinoxaline derivatives, is reported. The reaction proceeds with operational simplicity, an easily available catalyst system, and a broad substrate scope, and without the need for pre-functionalization, which offers the potential for further de ...
DOI:
10.1039/c9cc09649c

12. Divergent oxidative dearomatization coupling reactions to construct polycyclic cyclohexadienones

Author:
Qian Pu; Mingming Huo; Guojuan Liang; Lijuan Bai; Genhui Chen; Hongjiao Li; Peng Xiang; Hui Zhou; Jing Zhou
Source:
Chemical communications 2022 v.58 no.27 pp. 4348-4351
ISSN:
1364-548X
Subject:
catalysts; chemical communication; chemical reactions; chemoselectivity; methodology
Abstract:
... Highly selective divergent oxidative dearomatization coupling reactions, in which the chemoselectivity is controlled by catalysts and bases, are reported herein. Three different kinds of polycyclic cyclohexadienones are produced from the same reactants (41 examples, 85–99% yield). Our method marks a novel copper- and palladium-catalyzed C–H oxidative dearomatization of phenolic derivatives. ...
DOI:
10.1039/d2cc00183g

13. Dual ligand-promoted palladium-catalyzed nondirected C–H alkenylation of aryl ethers

Author:
Biao Yin; Manlin Fu; Lei Wang; Jiang Liu; Qing Zhu
Source:
Chemical communications 2020 v.56 no.22 pp. 3293-3296
ISSN:
1364-548X
Subject:
biphenyl; carbon-hydrogen bond activation; catalysts; catalytic activity; chemical reactions; dibenzofuran; drugs; ethers; fluorescence; ligands; oxides; palladium
Abstract:
... Direct C–H functionalization of aryl ethers remains challenging owing to their low reactivity and selectivity. Herein, a novel strategy for nondirected C–H alkenylation of aryl ethers promoted by a dual ligand catalyst was demonstrated. This catalytic system readily achieved the highly efficient alkenylation of alkyl aryl ethers (anisole, phenetole, n-propyl phenyl ether, n-butyl phenyl ether and ...
DOI:
10.1039/d0cc00940g

14. Dynamic kinetic resolution of a tertiary alcohol

Author:
Franziska Kühn; Satoko Katsuragi; Yasuhiro Oki; Cedric Scholz; Shuji Akai; Harald Gröger
Source:
Chemical communications 2020 v.56 no.19 pp. 2885-2888
ISSN:
1364-548X
Subject:
alcohols; catalysts; catalytic activity; chemical reactions; enzymes; esters
Abstract:
... In spite of the tremendous success of dynamic kinetic resolutions for a broad range of compound classes, tertiary alcohols and their corresponding esters have still remained as one of the most challenging substrates for this type of process. This is due to the size and steric hindrance of tertiary alcohols as well as to the difficulty in finding reaction conditions for the racemization of such com ...
DOI:
10.1039/c9cc09103c

15. Electronic structure inspired a highly robust electrocatalyst for the oxygen-evolution reaction

Author:
Peng Zhang; Ying-Rui Lu; Chia-Shuo Hsu; Huai-Guo Xue; Ting-Shan Chan; Nian-Tzu Suen; Hao Ming Chen
Source:
Chemical communications 2020 v.56 no.58 pp. 8071-8074
ISSN:
1364-548X
Subject:
X-ray photoelectron spectroscopy; catalysts; catalytic activity; chemical bonding; chemical reactions; density functional theory; durability; electrochemistry; nickel; oxygen production; prediction; transmission electron microscopy
Abstract:
... We demonstrated that the electronic-band structure holds the key to electrocatalytic durability towards the oxygen-evolution reaction (OER). Density functional theory (DFT) revealed the characteristic of Ni–Ni bonding interactions within Ni₅P₄, Ni₅P₂ and Ni₃P were different and could influence their phase stabilities during the OER. Ni₅P₂ and Ni₃P exhibited very robust OER performances at high cur ...
DOI:
10.1039/d0cc02165b

16. Enantioselective Lewis base catalyzed phosphonyldifluoromethylation of allylic fluorides using a C-silyl latent pronucleophile

Author:
You Zi; Markus Lange; Ivan Vilotijevic
Source:
Chemical communications 2020 v.56 no.42 pp. 5689-5692
ISSN:
1364-548X
Subject:
Cinchona; Lewis bases; alkaloids; catalysts; catalytic activity; chemical reactions; enantiomers; enantioselectivity; fluorides; organofluorine compounds; organosilicon compounds; phosphonates
Abstract:
... The first enantioselective phosphonyldifluoromethylation is enabled by the use of diethyl (difluoro(trimethylsilyl)-methyl)phosphonate reagent as a latent pronucleophile in the Lewis base catalyzed substitution of allylic fluorides. The reaction proceeds as a kinetic resolution to produce both the difluoromethylphosphonate products and the remaining fluorides in good yields and with high stereosel ...
DOI:
10.1039/d0cc01815e

17. Engineering zirconium-based UiO-66 for effective chemical conversion of d-xylose to lactic acid in aqueous condition

Author:
Panyapat Ponchai; Kanyaporn Adpakpang; Sutarat Thongratkaew; Kawisa Chaipojjana; Suttipong Wannapaiboon; Siwarut Siwaipram; Kajornsak Faungnawakij; Sareeya Bureekaew
Source:
Chemical communications 2020 v.56 no.58 pp. 8019-8022
ISSN:
1364-548X
Subject:
Lewis acids; acetic acid; active sites; catalysts; catalytic activity; chemical reactions; coordination polymers; crystal structure; engineering; furfural; lactic acid; xylose; zirconium
Abstract:
... Utilizing metal–organic frameworks (MOFs) as heterogeneous catalysts is an interesting and important application due to their well-controlled catalytic sites and well-defined porous structures. In this study we apply, for the first time, Zr-based UiO-66 for the catalytic hydrothermal conversion of d-xylose to lactic acid (LA). The reactions are catalyzed by the coordinatively unsaturated Zr⁴⁺, as ...
DOI:
10.1039/d0cc03424j

18. Enhanced ammonia synthesis performance of ceria-supported Ru catalysts via introduction of titanium

Author:
Yuyuan Wu; Chunyan Li; Biyun Fang; Xiuyun Wang; Jun Ni; Bingyu Lin; Jianxin Lin; Lilong Jiang
Source:
Chemical communications 2020 v.56 no.7 pp. 1141-1144
ISSN:
1364-548X
Subject:
adsorption; ammonia; catalysts; ceric oxide; cerium; chemical reactions; electrons; hydrogen; nitrogen; ruthenium; titanium
Abstract:
... The spatial arrangements of Ti species would affect the electronic metal–support interactions and the proportion of Ce³⁺ sites for ceria-supported Ru catalysts. Ti-Surface-loaded CeO₂ supported Ru catalysts exhibited excellent ammonia synthesis activity, which is attributed to a larger proportion of Ru metal, more electrons of Ru species and better adsorption ability of hydrogen and nitrogen. ...
DOI:
10.1039/c9cc07385j

19. Fe-doped Co₃O₄ polycrystalline nanosheets as a binder-free bifunctional cathode for robust and efficient zinc–air batteries

Author:
Xiao-Zhi Liu; Tang Tang; Wen-Jie Jiang; Qing-Hua Zhang; Lin Gu; Jin-Song Hu
Source:
Chemical communications 2020 v.56 no.40 pp. 5374-5377
ISSN:
1364-548X
Subject:
batteries; carbon; catalysts; cathodes; chemical reactions; cobalt oxide; electrochemistry; iron; nanosheets; oxygen
Abstract:
... Fe-doped Co₃O₄ polycrystalline nanosheets vertically grown on carbon cloth were developed as self-standing efficient bifunctional electrocatalysts for oxygen reduction and evolution, enabling high-performance Zn–air batteries with a power density of 268.6 mW cm⁻² and superior cycling stability. ...
DOI:
10.1039/d0cc01024c

20. Impacts on carbon dioxide electroreduction of cadmium sulfides via continuous surface sulfur vacancy engineering

Author:
Ling Cheng; Yuhang Li; Aiping Chen; Yihua Zhu; Chunzhong Li
Source:
Chemical communications 2020 v.56 no.4 pp. 563-566
ISSN:
1364-548X
Subject:
cadmium sulfide; carbon dioxide; catalysts; chemical reactions; electrochemistry; energy; engineering; nanorods; sulfur
Abstract:
... Cadmium sulfide (CdS) has been found to be a favorable electrocatalyst for CO₂ reduction owing to its appropriate binding energy of the key intermediates that originate from the CdS(002) surface with S vacancy (Sᵥ). In this work, CdS nanorods with a medium Sᵥ content (ca. 9%) give the highest CO Faraday efficiency of 100 ± 0.5% and a partial current density of −20.5 ± 0.2 mA cm⁻². ...
DOI:
10.1039/c9cc08330h