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Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]

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https://www.readbyqxmd.com/read/30238681/nickel-cobalt-and-palladium-catalysed-c-h-functionalization-of-un-activated-c-sp-3-h-bond
#1
Ashish A Mishra, Dnyaneshwar Subhedar, Bhalchandra M Bhanage
This review represents nickel, cobalt and palladium catalyzed C-H activation of sp3 carbon, with special emphasis on methyl C-H activation. The importance of directing group assistance and effect of ligand on β- or γ- C(sp3 )-H activation is summarized in this review. The mechanistic study for Ni, Co and Pd catalyzed sp3 C-H bond functionalization also discussed in detail.
September 20, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30238597/our-contributions-in-synthesis-of-diverse-heterocyclic-scaffolds-by-using-mixed-oxides-as-heterogeneous-catalysts
#2
REVIEW
Sandeep V H S Bhaskaruni, Kranthi Kumar Gangu, Suresh Maddila, Sreekantha B Jonnalagadda
This personal account mainly introduces and reviews our recent contributions in developing different catalyst materials involving mixed oxides and their scope as renewable catalysts in multicomponent reactions to synthesize various novel heterocyclic scaffolds under green conditions. The application of various mixed oxides and their composites in the organic synthesis is emphasized through this review, in order to reveal the versatility, scope and importance of mixed oxides and their interactions during the reaction...
September 20, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30230690/recent-developments-in-the-biosynthesis-of-cu-based-recyclable-nanocatalysts-using-plant-extracts-and-their-application-in-the-chemical-reactions
#3
REVIEW
Mahmoud Nasrollahzadeh, Fatemeh Ghorbannezhad, Zahra Issaabadi, S Mohammad Sajadi
Copper nanoparticles (NPs) are one of the most commercialized nanomaterials. From the standpoint of nanotechnology copper-based nanostructured materials have many applications in biological process, folk medicine, electronics, and industrial fields. With growing concern regarding the energy crisis and problems of chemical and physical procedures to prepare the metal nanoparticles, efforts for alternative traditional chemistry attracted particular considerations. A widespread of researches have studied on biological methods which do not generate hazardous waste and therefore, don't need the purification processes...
September 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30230688/nanoarchitectonic-based-material-platforms-for-environmental-and-bioprocessing-applications
#4
REVIEW
Katsuhiko Ariga, Joshua A Jackman, Nam-Joon Cho, Shan-Hui Hsu, Lok Kumar Shrestha, Taizo Mori, Jun Takeya
The challenges of pollution, environmental science, and energy consumption have become global issues of broad societal importance. In order to address these challenges, novel functional systems and advanced materials are needed to achieve high efficiency, low emission, and environmentally friendly performance. A promising approach involves nanostructure-level controls of functional material design through a novel concept, nanoarchitectonics. In this account article, we summarize nanoarchitectonic approaches to create nanoscale platform structures that are potentially useful for environmentally green and bioprocessing applications...
September 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30230223/mechanisms-and-inhibitors-of-histone-arginine-methylation
#5
REVIEW
Melody D Fulton, Tyler Brown, Y George Zheng
Histone methylation plays an important regulatory role in chromatin restructuring and RNA transcription. Arginine methylation that is enzymatically catalyzed by the family of protein arginine methyltransferases (PRMTs) can either activate or repress gene expression depending on cellular contexts. Given the strong correlation of PRMTs with pathophysiology, great interest is seen in understanding molecular mechanisms of PRMTs in diseases and in developing potent PRMT inhibitors. Herein, we reviewed key research advances in the study of biochemical mechanisms of PRMT catalysis and their relevance to cell biology...
September 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30230219/catalytic-enantioselective-flow-processes-with-solid-supported-chiral-catalysts
#6
REVIEW
Carles Rodríguez-Escrich, Miquel A Pericàs
Sustainability concerns are the wind in the sails for the development of novel, more selective catalytic processes. Hence, chiral catalysts play a crucial role in the green production of enantioenriched compounds. To further increase the green profile of this approach, the use of solid-supported catalytic species is appealing due to the reduced generation of waste, as well as the possibility of reusing the precious catalyst. Even more attractive is the implementation of flow processes based on these immobilized catalysts, a flexible strategy that allows to generate from milli- to multi-gram amounts of chiral product with a reduced footprint set-up...
September 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30230196/development-of-high-performance-heterogeneous-catalysts-for-selective-cleavage-of-c-o-and-c-c-bonds-of-biomass-derived-oxygenates
#7
REVIEW
Tomoo Mizugaki, Kiyotomi Kaneda
The environmental impact of CO2 emissions via the use of fossil resources as chemical feedstock and fuels has stimulated research to utilize renewable biomass feedstock. The biogenic compounds such as polyols are highly oxygenated and their valorization requires the new methods to control the oxygen to carbon ratio of the chemicals. The catalytic cleavage of C-O bonds and C-C bonds is promising methods, but the conventional catalyst systems encounter the difficulty to obtain the high yields of the desired products...
September 19, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30211475/encouragements-for-the-use-of-microwaves-in-industrial-chemistry
#8
REVIEW
Ritsuko Nagahata, Kazuhiko Takeuchi
Microwave travels at the speed of light, and transfers energy solely to materials. This holds great promise for energy conservation in industrial processes. However, due to differences with common heating principles, and misunderstanding of the correct way to handle them, the effectiveness of microwaves has been underestimated, and development of technologies using microwaves often stops due to this. This paper has focused on the use of microwave heating for organic/polymer synthesis, specifically for a highly effective condensation reaction and for use with ionic reactants...
September 13, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30203916/applications-of-dainshefsky-s-dienes-in-the-asymmetric-synthesis-of-aza-diels-alder-reaction
#9
REVIEW
Afsaneh Taheri Kal-Koshvandi, Majid M Heravi
Asymmetric hetero-Diels-Alder (AHDA) reactions provide a multitude of opportunities for the highly efficient, regio- and stereoselective construction of various heterocycles in enantiomerically pure form. The asymmetric aza-Diels-Alder (A-aza-DA) reaction using diversely hetero-dienophiles and hetero-dienes have been increasingly developed as a valuable method for the synthesis of functionalized nitrogen ring systems. The purpose of this review is to give a detailed discussion of the A-aza-DA reaction particularly, the stereoselective reactions of imines as dienophiles with Dainshefsky dienes to obtain optically pure aza-Diels-Alder products...
September 11, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30203911/premodified-surface-method-to-obtain-ultra-highly-dispersed-metals-and-their-3d-structure-control-on-an-oxide-single-crystal-surface
#10
REVIEW
Satoru Takakusagi, Yasuhiro Iwasawa, Kiyotaka Asakura
Precise control of the three-dimensional (3D) structure of highly dispersed metal species such as metal complexes and clusters attached to an oxide surface has been important for the development of next-generation high-performance heterogeneous catalysts. However, this is not easily achieved for the following reasons. (1) Metal species are easily aggregated on an oxide surface, which makes it difficult to control their size and orientation definitely. (2) Determination of the 3D structure of the metal species on an oxide powder surface is hardly possible...
September 11, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30203910/sulfate-based-cathode-materials-for-li-and-na-ion-batteries
#11
REVIEW
Laura Lander, Jean-Marie Tarascon, Atsuo Yamada
Electrochemical energy storage via Li-ion batteries has changed modern life drastically and has enabled technologies such as portable electronic devices, electric vehicles and stationary grid storage. However, with the steadfast technological evolution and increasing energy demands, batteries need to be constantly improved to meet the needs of our society. Furthermore, increasing concerns are raised regarding sustainability, availability of raw materials and cost. Therefore, extensive research efforts have been focused on the development of new battery types leading to the emergence of the Na-ion technology and the discovery of a myriad of new materials...
September 11, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30182467/developing-graphene-based-nanohybrids-for-electrochemical-sensing
#12
REVIEW
He Song, Xiaoyuan Zhang, Yunfang Liu, Zhiqiang Su
Graphene-based nanohybrid is considered to be the most promising nanomaterial for electrochemical sensing applications due to the defects created on the graphene oxide layers. These defects provide graphene oxide unique properties, such as excellent conductivity, large specific surface area, and electrocatalytic activity. These unique properties encourage scientists to develop novel graphene-based nanohybrids and improve the sensing efficiency. This review, therefore, addresses this topic by comprehensively discussing the strategies to fabricate novel graphene based nanohybrids with high sensitivity...
September 5, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30182512/design-and-catalytic-application-of-functional-porous-organic-polymers-opportunities-and-challenges
#13
REVIEW
Nagasuresh Enjamuri, Santu Sarkar, Benjaram M Reddy, John Mondal
This review article encompasses the progress and conventional overview of current research activities of porous organic polymers (POPs), especially in catalysis, as they have garnered colossal interest in the scientific fraternity due to their intriguing characteristic features. Various synthetic strategies with possible modification of functionality of POPs have been used to improve the catalytic efficiency towards value-added chemicals production. Accordingly, this review article is mainly focused on the design, development of various functionalized POPs by employing Friedel-Crafts alkylation, FeCl3 assisted oxidative polymerisation and polymerisation in nonaqueous medium, and a comprehensive understanding in potential catalytic applications namely, acetalization, hydrodeoxygenation (HDO), hydrogenation, coupling, photocatalytic hydrogen evolution and biomass conversion towards the production of value-added chemicals in biodiesel and chemical industries...
September 4, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30182484/continuous-flow-suzuki-miyaura-and-mizoroki-heck-reactions-under-microwave-heating-conditions
#14
REVIEW
Yasunari Monguchi, Tomohiro Ichikawa, Tsuyoshi Yamada, Yoshinari Sawama, Hironao Sajiki
Microwave-assisted continuous-flow reactions have attracted significant interest from synthetic organic chemists, especially process chemists from practical points of view, due to a less complicated shift to large-scale synthesis based on simple and continuous access to products with low energy requirements. In this personal account, we focused on the Suzuki-Miyaura and Mizoroki-Heck reactions, both of which are significantly important cross-coupling reactions for the synthesis of various functional materials...
September 4, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30156367/carbon-nanomaterials-for-targeted-cancer-therapy-drugs-a-critical-review
#15
REVIEW
Bozena Hosnedlova, Marta Kepinska, Carlos Fernandez, Qiuming Peng, Branislav Ruttkay-Nedecky, Halina Milnerowicz, Rene Kizek
Cancer represents one of the main causes of human death in developed countries. Most current therapies, unfortunately, carry a number of side effects, such as toxicity and damage to healthy cells, as well as the risk of resistance and recurrence. Therefore, cancer research is trying to develop therapeutic procedures with minimal negative consequences. The use of nanomaterial-based systems appears to be one of them. In recent years, great progress has been made in the field using nanomaterials with high potential in biomedical applications...
August 29, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30151867/adventures-in-defining-roles-of-oxygenases-in-the-regulation-of-protein-biosynthesis
#16
REVIEW
Louise J Walport, Christopher J Schofield
The 2-oxoglutarate (2OG) dependent oxygenases were first identified as having roles in the post-translational modification of procollagen in animals. Subsequently in plants and microbes, they were shown to have roles in the biosynthesis of many secondary metabolites, including signalling molecules and the penicillin/cephalosporin antibiotics. Crystallographic studies of microbial 2OG oxygenases and related enzymes, coupled to DNA sequence analyses, led to the prediction that 2OG oxygenases are widely distributed in aerobic biology...
August 27, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30117656/cu-based-nanoparticles-as-emerging-environmental-catalysts
#17
REVIEW
Pangkita Deka, Biraj Jyoti Borah, Himadri Saikia, Pankaj Bharali
This account provides an overview of current research activities on nanoparticles containing the earth-abundant and inexpensive element copper (Cu) and Cu-based nanoparticles, especially in the field of environmental catalysis. The different synthetic strategies with possible modification of the chemical/ physical properties of these nanoparticles using such strategies and/or conditions to improve catalytic activity are presented. The design and development of support and/or bimetallic systems (e. g., alloys, intermetallic, etc...
August 17, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30117651/lithium-versus-mono-polyvalent-ion-intercalation-hybrid-metal-ion-systems-for-energy-storage
#18
REVIEW
Radostina Stoyanova, Violeta Koleva, Antonia Stoyanova
The energy storage by redox intercalation reactions is, nowadays, the most effective rechargeable ion battery. When lithium is used as intercalating agents, the high energy density is achieved at an expense of non-sustainability. The replacement of Li+ with cheaper monovalent ions enables to make greener battery alternatives. The utilization of polyvalent ions instead of Li+ permits to multiplying the battery capacity. Contrary to Li+ , the realization of quick and reversible intercalation of bigger monovalent and of polyvalent ions is a scientific challenge due to kinetic constraints, polarizing ion effects and Coulomb interactions...
August 17, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30106499/perspectives-of-microwaves-enhanced-heterogeneous-catalytic-gas-phase-processes-in-flow-systems
#19
REVIEW
Andrzej Stankiewicz, Farnaz Eghbal Sarabi, Abdul Baubaid, Peng Yan, Hakan Nigar
The paper discusses the currents status and future perspectives of the utilization of microwaves, as a selective and locally controlled heating method, in heterogeneous catalytic flow reactors. Various factors related to the microwave-catalyst interaction and the design of microwave-assisted catalytic reactor systems are analyzed. The analysis clearly shows the superiority of the traveling-wave systems over the mono-mode and multi-mode cavity-based systems when it comes to the design and application of microwave flow reactors at relevant production scales...
August 14, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
https://www.readbyqxmd.com/read/30094924/gate-tunable-organic-light-emitting-diodes-principles-and-prospects
#20
REVIEW
Huaping Li
This record summarizes our recent developments on gate-tunable organic light-emitting diodes (OLEDs). The key point is to modulate the charge carrier injection barrier by the applied gate potential. One way is to electrochemically dope charge carrier injection layer through porous electrodes. The electrochemically doped charge carrier layer thus form gate-tunable contact with porous electrodes. Another way is to modulate the work-function of electrodes that can have varied charge carrier injection barriers following the applied gate potential...
August 10, 2018: Chemical Record: An Official Publication of the Chemical Society of Japan ... [et Al.]
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