A combination of Fe3O4 magnetic nanoparticles and metal‐organic frameworks leads to the formation of magnetic framework composites with unique design principles by various synthesis methods. Promising applications in different areas such as catalysis, biomedical, extraction, are discussed. The recent advances are summarized, and evaluations are given in this review. In this review, we gather a great deal of information about magnetic nanocomposites, which are made from the combination of Fe3O4...
Investigation of the correlation between the electronegativity difference and valence electron concentration in intermetallic gallides lead to the discovery of the new compound Ba3LiGa5 (space group Immm, a = 6.2720(2) Å, b = 6.5872(2) Å, c = 12.6878(8) Å). A combination of quantum chemical bonding analysis with NMR study, and measurements of the physical properties revealed the gallium substructure to be formed of chains built of the interconnected pyramidal [Ga5] clusters. The structure can be...
A new N ‐acylamidine copper complex was observed when 2‐(trifluoromethyl)‐2,3,3,3‐tetrafluoropropane nitrile, a new insulating gas for gas‐insulated equipment, was brought in contact with copper in the presence of oxygen and small amounts of water. The new complex offers interesting properties; however, in gas‐insulated high voltage equipment such complex formation by reaction of the insulating gas should be avoided. Herein we describe the compatibility of 2‐(trifluoromethyl)‐2,3,3,3‐tetrafluoropropane...
The Front Cover shows the formation of multiply fused porphyrin tapes on a surface by the oxidative gas phase reaction of metalloporphyrins. The metal center (FeIII, CoII, NiII, CuII, ZnII, or PdII) governs the formation of doubly or triply linked porphyrin tapes and affects the near‐infrared absorbance and the electrical conductivity of the films. More information can be found in the https://doi.org/10.1002/ejic.202000243Full Paper by K. Heinze, N. D. Boscher et al.
With increasing H2O2 exposure the dissolution yield of Gd‐doped UO2 decreases. This indicates a change in the redox reactivity of Gd‐doped UO2 upon the exposure to H2O2. An inhibiting effect of H2 on the oxidative dissolution of Gd‐doped UO2 could not be observed. The reactivity of H2O2 towards (U1–x Gd x)O2 (x = 0.03, 0.045, 0.08) in the presence of H2 was studied experimentally to assess the effect of H2 on oxidative dissolution of Gd‐doped UO2 under deep repository conditions for...
This work studies the effect of citric acid to metal molar ratios (CA/M) on the properties of Ce‐Zr mixed oxides synthesized by the citrate‐nitrate gel‐combustion method. Results show that the CA/M ratio used affects the texture and the reducibility of the samples by modifying specific surface area and crystallite size. The aim of this work is to study the effect of the citric acid to metal molar ratio (CA/M) used in the citrate synthesis route on the structural, morphological and redox properties...
Pentacoordinated phosphorus–tetracoordinated boron bonded compounds were isolated. Upon hydride abstraction of a phosphoranyl‐trihydroborate, a phosphoranyl‐borane intermediate could undergo a rearrangement reaction to give a bicyclic compound or it could act as a mono‐hydroboration reagent. A phosphoranyl‐triarylborate was stable to acids and bases due to the large bulk around the long P–B bond. The isolation and reactivities of two pentacoordinated phosphorus–tetracoordinated boron bonded...
Porphyrin tapes: Oxidative chemical vapor deposition of 5,15‐disubstituted metalloporphyrins gives metalloporphyrin tapes (M = 2H, FeIIICl, CoII, NiII, CuII, ZnII, PdII) in a single step. The metal center steers the regioselectivity of the initial C–C coupling reaction. The resulting double or triple linkages determine the NIR absorbance and conductivity of the resulting thin films. Metalloporphyrin tapes form in a solvent‐free oxidative chemical vapor deposition process on glass substrates....
The orthorhombic Sr7Li6Sn12 crystal shows high degree of occupational disordering between Li and Sn atoms. This disorder is governed by the need for the structure to achieve optimum number of valence electrons. Upon partial substitution of Sr with Ca atoms, the symmetry distorts to monoclinic and the phase (Ca,Sr)7Li6Sn12 is realized. Therein, local distortion due to Ca and Sr atoms being mixed leads to ordering between Li and Sn atoms. In this paper, we discuss the synthesis and the structural...
The synthesis, characterization, and reactivity of group 4 organometallics exclusively supported by β ‐diketonate ligands are reported. Combined crystallography and spectroscopy indicate fluxionality among all ligands involved. Their decomposition pathways and competency in olefin polymerizations are determined. A 1,3‐benzyl migration is observed for the benzylzirconium(IV) compounds. Implications for first‐row β ‐diketonate‐supported organometallics and catalysis are discussed. The synthesis,...
The copper and silver complexes of bulky nitrogen‐confused C ‐scorpionates were prepared to compare effects of ligand substitution, ligand number, and metal on their solid state and solution properties. The ability for the complexes to catalyze styrene aziridination with different nitrene sources was also evaluated. Two new sterically demanding nitrogen‐confused C ‐scorpionate ligands with a bis(3,5‐diisopropylpyrazol‐1‐yl)methyl group bound to the 3‐ position of a normal pyrazole (HLiPr2 ...
Chemical non‐innocence of di/tetrahydro‐bisisoquinolines and biimidazopyridine has been illustrated upon coordination with {Ru(acac)2} (acac=acetylacetonate) in the context of oxidative aromatization and C–C coupling/nucleophilic attack assisted ring fission, respectively. Impact of metal chelation and systematic alteration of α‐diimines on the variegated reactivity profile have been rationalized by structural, spectroscopic analyses and transition state theory. The diverse reactivity profiles...
The local ligand field potential in a cell containing a ligand is higher than the average that leads to positive parameter values and an increase in d orbital energies, but it is lower in a “coordination void” and the parameters are negative. Voids can exert strong σ and π effects. They also illustrate a fundamental difference between ligand field theory as originally envisioned by its pioneers and the simple MO overlap approach which has become the commonly accepted picture. Multi reference...
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Dimers of pyrrole‐based anion‐responsive π‐electronic molecules that are linked by appropriate π‐conjugated spacers were synthesized. The dimers showed [2+1]‐, [1+1]‐, and [1+2]‐type anion binding in solution, whereas [2+2]‐ and [1+2]‐type complexes were formed in the solid state. The dimer with an electron‐deficient spacer unit formed a [2+1]‐type double helical structure with shuttling of the bound anion between two binding sites. Dimers of pyrrole‐based anion‐responsive π‐electronic molecules...
A one‐step, three‐component Petasis reaction of isatin derived 5‐arylboronate‐3‐substituted oxindole derivatives with salicylaldehydes and secondary amines affords new enantiomerically pure structurally diverse 5‐α‐(3‐substituted‐oxindole)‐benzylamine derivatives. The reaction shows good substrate and reagent scope affording the products with good to excellent yields (up to >99% yield) and enantioselectivities (up to 99% ee) using cheap and readily available (R)‐BINOL as the organocatalyst. A...
A synthetic method for quinoxaline derivatives from the [4+2] annulation of β‐keto sulfoxonium ylides and o‐phenylenediamine by using (Cp*IrCl 2 ) 2 catalyst is described. This novel protocol features mild reaction conditions, moderate to excellent yields, wide substrate scope, and high functional‐group compatibility. Moreover, this cyclization strategy was successfully applied in late‐stage modification for structurally complex bioactive compounds
Using arylboronic acids (Ar‐B(OH)2) as an illustrative case of boronorganic compounds, the applications of these highly versatile molecules which expands much beyond their commonly perceived uses are reviewed. Boron organometallic compounds are mainly known for their great value in organic synthesis to construct biaryls in Suzuki couplings, for arylations of olefins, for C–S, C–O, and C–N couplings or as organometallic catalysts. Herein, using arylboronic acids (Ar‐B(OH)2) as a illustrative...
A concise synthesis of Mizoroki–Heck products and corresponding indenes starting with simple tert ‐alkenols and aryl halides is presented. Notably, the γ‐arylation was done under [Pd]‐catalysis by using water as the sole green solvent and the synthesis of indenes via acid‐mediated intramolecular Friedel–Crafts cyclization. A highly stereoselective [Pd]‐catalyzed arylation of tert ‐alkenols, is presented and applied to the synthesis of indenes using intramolecular Friedel–Crafts alkylation...
The Front Cover an efficient and operationally simple method for chemoselective reduction of sulfoxides to sulfides using bis(catecholato)diboron (B2cat2) as a reducing agent. The present protocol is characterized by high functional group tolerance and easy purification. The background picture was taken at Ginkaku‐ji Temple, near Kyoto University (Japan), a peaceful place for serene contemplation. More information can be found in the https://doi.org/10.1002/ejoc.202000222Communication by K. Nogi,...
The role that macrocyclic peptidomimetics will play in the future is subjected to our ability to control their morphologic attributes. The present minireview fills a critical gap in the understanding of molecules endowed with conformational chirality representing a stimulus to propel further development of peptoids in biological, pharmaceutical, and material sciences contexts. Peptoids (N ‐substituted glycine oligomers) are an increasingly important class of peptidomimetic foldamers with conspicuous...
The Cover Feature shows “King Boc and His flock”. N‐Boc‐protected 3‐diazo2‐pyrrolidone is a new versatile reagent for introducing the privileged 2‐pyrrolidone motif to various molecules via a Rh(II)‐catalyzed X‐H insertion into thiols, alcohols, and amines. Removal of the Boc group liberates the NH‐2‐pyrrolidone moiety which can, in turn be used for further modifications at the nitrogen atom or reduced to give 3‐substituted pyrrolidines, privileged building blocks on their own. More information...
A new diazo reagent for introduction of a privileged NH ‐2‐pyrrolidone moiety via oxygen, sulfur and nitrogen atom is presented. tert ‐Butyl 3‐diazo‐2‐oxopyrrolidine‐1‐carboxylate synthesized on multigram scale has been employed to introduce a privileged NH ‐2‐pyrrolidone moiety via oxygen, sulfur and nitrogen atom to partner molecules via RhII‐catalyzed X–H insertion followed by Boc group removal. Further manipulation of pyrrolidine moiety has been exemplified.
An original synthesis of 2‐substituted thioglycals is reported from a carbohydrate‐derived ketene dithioacetal in a straightforward two‐step sequence. Their synthetic potential as precursors of new sugar‐derived unsaturated sulfonium salts is illustrated. A novel strategy for the synthesis of 2‐substituted thioglycals has been developed from a carbohydrate‐derived ketene dithioacetal in a two‐step sequence. The introduction of various electrophilic groups at the double bond of the ketene dithioacetal...
In this report, our work on the use of spin probes in the field of supramolecular chemistry and how electron spin resonance (EPR) has been used for detecting and identifying supramolecular assemblies is shortly reviewed In this report, our work describing the use of spin probes in the field of supramolecular chemistry and how electron spin resonance (EPR) has been used for detecting and identifying supramolecular assemblies is shortly reviewed. Selected examples are reported, including paramagnetic...
The main novelty of the present study is the development of the synthesis for an unusual and rare class of compounds – 8‐ylidenebenzazecines. The target compounds were synthesized via two strategies and obtained in high and good yields. The first method is an efficient MW‐assisted rearrangement of azacyclic allenes, the second one represents one‐pot protocol based on enlargement of tetrahydropyridine moiety to 8‐ylidene decorated azecine ring. We have elaborated a general and simple microwave‐assisted...
A robust alcohol amination protocol using common saturated cyclic amines and primary alcohols as starting material is described for synthesis of 29 compounds. The reactions are catalyzed by combination of dichloro(p ‐cymene)ruthenium(II) dimer precatalyst with triphenylphosphine ligand. The catalyst can be precipitated by addition of hexane or cold diethyl ether, followed by isolation of the product as a hydrochloride salt without the need for chromatographic purification in most cases. A robust...
An efficient and operationally simple method for the reduction of sulfoxides to sulfides using bis(catecholato)diboron as a reducing agent is described. This user‐friendly protocol is characterized by high functional group tolerance and easy purification process. An efficient and operationally simple method for the reduction of sulfoxides to sulfides has been developed using bis(catecholato)diboron (B2cat2) as a reducing agent. The present method accommodates various functional groups which...
Abiotic Oxidase Reaction Cascades: An immobilized antimony‐oxo porphyrin derivative is applied as visible‐light driven photocatalyst promoting the aromatic hydroxylation of L ‐tyrosine, followed by a stepwise four‐electron oxidation to generate the natural product dopachrome. The biomimetic diphenolase activity of the artificial enzyme is comparable to native tyrosinase. A stepwise non‐enzymatic conversion of the natural amino acid L ‐tyrosine into physiologically relevant intermediates L...
Rh catalysts derived from the phospholane‐phosphite ligand, BOBPHOS (L1 in picture) promote transmetalation of aryl boronic acids more readily than a Rh/BINAP control systems. This leads to some difficult asymmetric arylations becoming feasible for the first time, or for others to operate using much lower excess of aryl boronic acid. The use of Rh catalysts derived from a phospholane‐phosphite ligand were found to be more productive than the classic rhodium/BINAP system in enantioselective...
Theoretical and experimental work has been conducted about possible prebiotic syntheses of cysteine. Activated derivatives of this amino acid are able to oligomerize and polymerize to afford various poly‐thiazolines and cysteine‐rich chains. Theoretical and experimental work has been conducted about possible prebiotic syntheses of cysteine. Activated derivatives of this amino acid can oligomerize and polymerize to afford various poly‐thiazolines and cysteine‐rich chains.
A general strategy for the synthesis of tetrahydroquinolines and 1,4‐benzoxazepines has been developed via palladium‐catalyzed [4+2] and [5+2] annulations of propargyl carbonates with malonate‐tethered anilines and 2‐aminobenzylic alcohols. A series of six‐ and seven‐membered heterocycles with potential bioactivities was obtained in good to excellent yields. Palladium‐catalyzed [4+2] and [5+2] annulations of propargyl carbonates with malonate‐tethered anilines and 2‐aminobenzylic alcohols were...
A general method for solvent‐free hydroboration of alkynes has been developed by microwave irradiation, to get (E )‐alkenyl boronates. Several functionalizations in the C–B bond can be performed sequentially without the purification of the intermediates. A simple and rapid protocol for the anti‐Markovnikov hydroboration of alkynes assisted by microwave irradiation has been developed. Pinacolborane smoothly reacts with terminal alkynes to obtain (E )‐alkenyl boronates in good yields and short...
Glucuronoxylans 1 and 2 have been prepared by a concise synthetic route, where the pentaxylan backbone is assembled by preactivation‐based glycosylations with phenyl thioglycosides and the glucuronic acids are introduced by Koenigs‐Knorr couplings. The synthesis of two glucuronoxylans is described, which both consist of a pentaxylan backbone and a glucuronic acid linked to the 2 position in the fourth xylose residue from the reducing end. The two target molecules differ in the 4 position...
The synthesis of morpholin‐3‐one and 1,4‐oxazepan‐3‐one skeletons was achieved by the cycloaddition reaction of alcohol‐tethered enones and α‐halohydroxamates. This process proceeds through the addition of the hydroxyl group in the enone to an in‐situ generated azaoxyallyl cation followed by intramolecular aza‐Michael‐type trapping. Morpholin‐3‐ones and 1,4‐oxazepan‐3‐ones could be generated from γ‐hydroxy and δ‐hydroxy enones, respectively. Metal‐free and environmentally friendly synthesis...
A transition metal‐free superbase mediated indirect Friedländer reaction was developed for accessing functionalized quinolines using o‐aminobenzyl alcohol and ketones with an active methylene moiety. The reaction was employed in the functionalization of natural products and the applicability of the reaction for gram‐scale synthesis of quinolines was also demonstrated. A superbase mediated indirect Friedländer reaction towards functionalized quinolines has been realized. The reaction was performed...
A mild, efficient, convenient, and scalable method to synthesize phosphinates via direct phosphorylation between R2P(O)H and ROH was developed. Preliminary mechanistic studies suggest that a carbene‐involving process from CHCl3 to CH2Cl2 facilitates the phosphorylation. A mild, efficient, convenient and scalable method to synthesize phosphinates via direct phosphorylation between R2P(O)H and ROH was developed. All aromatic substrates completed this transformation with excellent yields (up to...
3,3'‐Bioxindoles, precursors of a wide family of natural products, are prepared via deacylative alkylation or by photoredox catalysis. New deacylative bromination is reported. The synthesis of 3,3'‐bioxindoles employing deacylative alkylations (DaA) in one‐pot process, where the 3‐bromooxindoles are generated in situ, is described. Good yields and moderate diastereoselections are obtained. By the modification of this procedure the synthesis of pure 3‐bromooxindoles through a deacylative bromination...
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Analyst, 2020, Accepted ManuscriptDOI: 10.1039/D0AN00809E, Communication Open Access This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Andrew Mills, Yusufu Dilidaer, Ri HanA polymer filament, containing an O2-sensitive lumophore pigment, platinum (II) (pentafluorophenyl) porphyrin coated onto nanoparticulate silica particles, i.e. PtTFPP/SiO2, is produced and used in a filament which is then 3D...The content of this RSS Feed (c) The Royal Society of Chemistry
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Analyst, 2020, Advance ArticleDOI: 10.1039/D0AN00673D, PaperShimaa Eissa, Mohammed ZourobRapid and economical biosensor for Staphylococcus aureus, one of the main causes of food-borne illness, was developed based on dual colorimetric and electrochemical detection.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry
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Analyst, 2020, Accepted ManuscriptDOI: 10.1039/D0AN00723D, CommunicationYoung Jun Seo, Guralamatta Siddappa Ravikumara, Anup PandithIn this study we synthesized the nucleotide dUrkTP, a highly fluorescent naphthalimide deoxyuridine triphosphate that undergoes aggregation-induced emission (AIE). We incorporated and extended dUrkTP during the primer extension of DNA...The content of this RSS Feed (c) The Royal Society of Chemistry
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Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC03439H, CommunicationMuhan He, Nidhi Nandu, Taha B Uyar, Maksim Royzen, Mehmet Veysel YigitHydrogels are networks of polymers that can be used for packaging different payload types. They are proven to be versatile materials for various biomedical applications. Implanted hydrogels with encapsulated drugs...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC01238F, CommunicationXiaojun Hu, Bingwei Zhou, Hongwei Jin, Yunkui Liu, Liming ZhangAn efficient synthesis of 2,5-disubstituted furans directly from alkynyl ketones has been developed via tandem gold(I)-catalyzed isomerization of alkynyl ketones to allenyl ketones and cycloisomerization. The key to the success...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Advance ArticleDOI: 10.1039/D0CC03004J, Communication Open Access This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Daniel J. Cornwell, David K. SmithThis paper explores multi-component gelation systems containing two low-molecular-weight gelators, one polymer gelator and three different triggers.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC02697B, CommunicationDing-Wei Ji, Gu-Cheng He, Wei-Song Zhang, Chao-Yang Zhao, Yan-Cheng Hu, Qing-An ChenA regiospecific allyl-allyl coupling reaction between 1,3-dienes and allylboronates has been demonstrated under nickel catalysis. Salient features of this method include the earth-abundant metal catalyst, excellent regioselectivity and good functional...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC02862B, CommunicationShin Hye Ahn, James Nicholas Iuliano, Eszter BorosThe lysosomal protease cathepsin B recognizes defined, short peptide sequences, providing means for effective, targeted drug release. Here, we show that the introduction of a coordination complex adjacent to the...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC02472D, CommunicationMuxin Yu, Caiping Liu, Shengchang Li, Yunfang Zhao, Jiangquan Lv, Zhu Zhuo, Feilong Jiang, Lian Chen, Yunlong Yu, Maochun HongThree unprecedented multi-cluster copper(I) halides (MCCHs) have been assembled with conformationally flexible ligands. Further explorations demonstrate that the conformational compliance of the ligand may be the key to trap and...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC03237A, Communication Open Access This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Thomas J. Osberger, Sarah L Kidd, Thomas A. King, David R SpringAll-syn fused cyclobutanes remain an elusive chemotype and thus present an interesting synthetic challenge. Herein, we report the successful application of Pd-catalysed C(sp3)-H arylation of cyclobutane compounds to generate all-syn...The content of this RSS Feed...
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC02046J, CommunicationYun Ju Hwang, Young Ho Park, Hong Soo Kim, Dae Hee Kim, Shahzad Ali, Saurav Sorcar, Monica Claire Flores, Michael R Hoffmann, Su-il InA dye sensitized betavoltaic cell is developed for the first time, which utilizes radioisotopic carbon, composed of nano-sized quantum dots, and ruthenium-based dye sensitized TiO2 as electrodes. In this cell,...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC02318C, CommunicationLaxmi Raman Adil, Parameswar K IyerLuminogens having aggregation-induced emission (AIE) and solid-state emission are intriguing molecules since they display higher fluorescence in their condensed or aggregated state by overcoming the undesirable aggregation-caused quenching (ACQ) effect....The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC03349A, CommunicationXiao-Jing Hu, Ge Huang, Shuo Zhang, Zhi-Bin Fang, Tianfu Liu, Rong CaoA facile method, post-synthetic exchange of modulators (PSEm), has been demonstrated here to prepare chiral metal-organic frameworks for enantioseparation. Based on this method, three chiral porous Zr-based metal-organic framework have...The content of this RSS Feed (c) The Royal Society of Chemistry
Chem. Commun., 2020, Accepted ManuscriptDOI: 10.1039/D0CC03023F, CommunicationKeita Shinzato, Yuki Nakagawa, So Hamamoto, Yuya Hayashi, Hiroki Miyaoka, Shigehito Isobe, Tamaki Shibayama, Norio Ogita, Takayuki IchikawaSurface modification effects of graphite and organic solvents for Ti were investigated using a thermogravimetry (TG), Raman spectroscopy, and transmission electron microscope (TEM) observation to improve the hydrogen absorption properties....The content of this RSS Feed (c) The Royal...
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Publication date: Available online 26 May 2020Source: Journal of ProteomicsAuthor(s): Sheila Garcia-Rosa, Benilton S. Carvalho, Paul C. Guest, Johann Steiner, Daniel Martins-de-Souza
Publication date: Available online 25 May 2020Source: Journal of ProteomicsAuthor(s): Robert Starke, Kaitlyn Oliphant, Nico Jehmlich, Stephanie Serena Schäpe, Timo Sachsenberg, Oliver Kohlbacher, Emma Allen-Vercoe, Martin von Bergen
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Medicine by Alexandros G. Sfakianakis,Anapafseos 5 Agios Nikolaos 72100 Crete Greece,00302841026182,00306932607174,alsfakia@gmail.com,