bluuebunny/crossref_metadata_2025 huggingface dataset:
Energy‐Funneling‐Based Broadband Visible‐Light‐Absorbing Bodipy–C60 Triads and Tetrads as Dual Functional Heavy‐Atom‐Free Organic Triplet Photosensitizers for Photocatalytic Organic Reactions
Authors: Huang Ling , Cui Xiaoneng , Therrien Bruno , Zhao Jianzhang
Published: November 2013

C60–bodipy triads and tetrads based on the energy‐funneling effect that show broadband absorption in the visible region have been prepared as novel triplet photosensitizers. The new photosensitizers contain two or three different light‐harvesting antennae associated with different absorption wavelengths, resulting in a broad absorption band (450–650 nm). The panchromatic excitation energy harvested by the bodipy moieties is funneled into a spin converter (C60), thus ensuring intersystem crossing and population of the triplet state. Nanosecond time‐resolved transient absorption and spin density analysis indicated that the T1 state is localized on either C60 or the antennae, depending on the T1 energy levels of the two entities. The antenna‐localized T1 state shows a longer lifetime (τT=132.9 μs) than the C60‐localized T1 state (ca. 27.4 μs). We found that the C60 triads and tetrads can be used as dual functional photocatalysts, that is, singlet oxygen (1O2) and superoxide radical anion (O2.−) photosensitizers. In the photooxidation of naphthol to juglone, the 1O2 photosensitizing ability of the C60 triad is a factor of 8.9 greater than the conventional triplet photosensitizers tetraphenylporphyrin and methylene blue. The C60 dyads and triads were also used as photocatalysts for O2.−‐mediated aerobic oxidation of aromatic boronic acids to produce phenols. The reaction times were greatly reduced compared with when [Ru(bpy)3Cl2] was used as photocatalyst. Our study of triplet photosensitizers has shown that broadband absorption in the visible spectral region and long‐lived triplet excited states can be useful for the design of new heavy‐atom‐free organic triplet photosensitizers and for the application of these triplet photosensitizers in photo‐organocatalysis.
On the Mechanism of Hydrogen Activation by Frustrated Lewis Pairs
Authors: Zeonjuk Lei Liu , Vankova Nina , Mavrandonakis Andreas , Heine Thomas , Röschenthaler Gerd‐Volker , Eicher Johannes
Published: November 2013

We report herein a comprehensive theoretical study of the thermodynamics and kinetics of molecular hydrogen activation by frustrated Lewis pairs (FLPs). A series of intermolecularly combined boranes (Lewis acids) and phosphines (Lewis bases), with experimentally established different reactivities towards H2, have been subjected to DFT and (SCS‐)MP2 calculations, and analyzed in terms of their structural properties, the energetics of association of the FLPs, and the kinetics of their interactions with H2 and hydrogenation to the ion‐pair products. The analysis included the following steps: 1) assessment of the ability/inability of the Lewis species to preorganize into FLPs with an optimum arrangement of the acid and base sites for preconditioning the reaction with H2, 2) comprehension of the different thermodynamics of hydrogenation of the selected FLPs by comparing the Gibbs energies of the overall reactions, and 3) estimation of the mechanism of the activation of H2 by identifying the reaction steps and the associated kinetic barriers. The results of our studies correlate well with experimental findings and have clarified the reasons for the observed different reactivities of the investigated systems, ranging from reversible or nonreversible activation to no reaction with H2. The derived predictions could assist the future design of Lewis acid–base systems with desired properties and applicability as metal‐free hydrogenation catalysts.
Temporary Intramolecular Generation of Pyridine Carbenes in Metal‐Free Three‐Component CH Bond Functionalisation/Aryl‐Transfer Reactions
Authors: Nawaz Faisal , Mohanan Kishor , Charles Laurence , Rajzmann Michel , Bonne Damien , Chuzel Olivier , Rodriguez Jean , Coquerel Yoann
Published: November 2013

Nucleophilic addition of pyridines to benzyne generates zwitterionic adducts that evolve by a rapid intramolecular proton shift to produce the corresponding pyridine carbenes, N‐phenyl pyrid‐2‐ylidenes. In the presence of electrophilic ketones (isatin derivatives), the pyridylidenes can further react by an original bis‐arylation reaction of the carbonyl compounds involving a formal pyridine CH bond functionalisation. The overall transformation is an unprecedented three‐component reaction featuring a carbene intermediate. The mechanism of this transformation was examined in detail by using both experimental and theoretical approaches. It was found that the generation of N‐phenyl pyrid‐2‐ylidene from pyridine and benzyne is energetically favoured, and that the corresponding carbene dimer can also form easily. Under the three‐component reaction conditions, the pyridylidene preferentially adds to the ketone group of the isatin derivative to produce a zwitterionic adduct amenable to an intramolecular aryl transfer reaction by a concerted nucleophilic aromatic substitution. This peculiar reactivity for a carbene was compared to possibly competitive known reactions of stable carbenes with carbonyl compounds, and the reaction was found to be under thermodynamic control. The reported method of generation of N‐phenyl pyrid‐2‐ylidenes and their reactivity with carbonyl compounds unlock new perspectives in organic synthesis.
ChemInform Abstract: Cerium Valence Change in the Solid Solutions Ce(Rh1‐χRuχ)Sn.
Authors: Niehaus Oliver , Abdala Paula M. , Riecken Jan F. , Winter Florian , Chevalier Bernard , Poettgen Rainer
Published: November 2013

A series of 15 samples in the system Ce(Rh1‐xRux)Sn (0 ≤ x ≤ 1) is prepared by arc melting of stoichiometric mixtures of the elements.
ChemInform Abstract: Investigations on the Phase Transition Between CdV2O6 and Cd2V2O7 and Their Photocatalytic Performances.
Authors: Li Di , Bai Xiaojuan , Pan Chengsi , Zhu Yongfa
Published: November 2013

The title compounds are hydrothermally synthesized from aqueous mixtures of NH4VO3 and CdCl2.
ChemInform Abstract: Two Types of Polyoxometalates Based on Circular P8W48 Cluster Units and Different Inclusions of Tetralanthanide and Octamanganese Centers.
Authors: Huang Ling , Cheng Lin , Fang Wei‐Hui , Wang Sa‐Sa , Yang Guo‐Yu
Published: November 2013

The four new polyoxotungstates (III), (V), (VII), and (IX) crystallize in the tetragonal space group I4/m with Z = 2 (single crystal XRD).
ChemInform Abstract: Tin‐Mediated Route to Polytungstates of RhII and PdII.
Authors: Sokolov Maxim N. , Kalinina Irina V. , Peresypkina Eugenia V. , Moroz Nikolay K. , Naumov Dmitry Yu. , Fedin Vladimir P.
Published: November 2013

Slow crystallization at room temperature is essential for isolation of (III) which is obtained as two solvatomorphs.
ChemInform Abstract: A Family of Novel Bifunctional Organocatalysts: Highly Enantioselective Alcoholysis of meso Cyclic Anhydrides and Its Application for Synthesis of the Key Intermediate of P2X7 Receptor Antagonists.
Authors: Yang Hong‐Jun , Xiong Fang‐Jun , Li Jie , Chen Fen‐Er
Published: November 2013

A novel chiral sulfamide catalyst is prepared and successfully applied in the methanolysis reaction of different cyclic anhydrides.
ChemInform Abstract: Nucleophile‐Catalyzed Additions to Activated Triple Bonds. Protection of Lactams, Imides, and Nucleosides with MocVinyl and Related Groups.
Authors: Mola Laura , Font Joan , Bosch Lluis , Caner Joaquim , Costa Anna M. , Etxebarria‐Jardi Gorka , Pineda Oriol , de Vincente David , Vilarrasa Jaume
Published: November 2013

A new method for the protection of different heterocyclic compounds is presented.
ChemInform Abstract: Discovery of an Iridacycle Catalyst with Improved Reactivity and Enantioselectivity in the Hydrogenation of Dialkyl Ketimines.
Authors: Schramm York , Barrios‐Landeros Fabiola , Pfaltz Andreas
Published: November 2013

In situ cyclometalation of acetophenone imine ADI with the Ir—PHOX complexes (I) yields highly active and selective catalyst for the title reaction.
ChemInform Abstract: Ruthenium‐Catalyzed Self‐Coupling of Primary and Secondary Alcohols with the Liberation of Dihydrogen.
Authors: Makarov Ilya S. , Madsen Robert
Published: November 2013

A new procedure for the self‐coupling of secondary alcohols is described.
ChemInform Abstract: Pd‐Catalyzed Cross‐Coupling of Potassium Alkenyltrifluoroborates with 2‐Chloroacetates and 2‐Chloroacetamides.
Authors: Molander Gary A. , Barcellos Thiago , Traister Kaitlin M.
Published: November 2013

A protocol for the stereocontrolled synthesis of (E)‐ and (Z)‐β,γ‐unsaturated esters and amides is reported.
ChemInform Abstract: Convenient Synthesis of Various Substituted Homotaurines from Alk‐2‐enamides.
Authors: Nai Youfeng , Xu Jiaxi
Published: November 2013

Various substituted homotaurines (IV) are synthesized via Michael addition of thioacetic acid (II) to alk‐2‐enamides (I), followed by LiAlH4 reduction and performic acid oxidation.
ChemInform Abstract: Aza‐Piancatelli Rearrangement Initiated by Ring Opening of Donor—Acceptor Cyclopropanes.
Authors: Wenz Donald R. , Read de Alaniz Javier
Published: November 2013

The development of a new platform to initiate the cascade rearrangement of furans for the formation of functionalized cyclopentenone building blocks is reported.
ChemInform Abstract: Unexpected Regioselectivity Switch: Organophosphine‐Triggered Reactions of Cyclopropene‐1,1‐dicarboxylates with Aldehydes.
Authors: Ni Shengjun , Chen Jie , Ma Shengming
Published: November 2013

With tris(4‐methoxyphenyl)phosphine as the nucleophilic reagent, the readily available cyclopropene‐1,1‐dicarboxylates undergo a ring‐opening reaction to generate a Wittig‐type intermediate, which stereoselectively reacts with aromatic aldehydes to yield (E)‐5‐aryl‐2‐(methoxycarbonyl)‐2,4‐pentadienoates.
ChemInform Abstract: Iridium‐Catalyzed Enantioselective Allylic Alkynylation.
Authors: Hamilton James Y. , Sarlah David , Carreira Erick M.
Published: November 2013

This method allows the highly enantioselective substitution of racemic allylic alcohols with potassium alkynyltrifluoroborates with excellent branched‐to‐linear selectivity.
ChemInform Abstract: A Method for Synthesis of Homoallylic Bromide.
Authors: Qi Wenke , Wang Peipei , Fan Liyuan , Zhang Songlin
Published: November 2013

Cyclopropyl Grignard reagents react with carbonyl compounds in the presence of diethyl phosphite to give homoallylic bromides.
ChemInform Abstract: Palladium‐Catalyzed Chelation‐Assisted Aromatic C—H Nitration: Regiospecific Synthesis of Nitroarenes Free from the Effect of the Orientation Rules.
Authors: Zhang Wei , Luo Shaojie , Liu Yunkui , Xu Zhenyuan
Published: November 2013

A new palladium‐catalyzed synthesis of nitroarenes is described.
ChemInform Abstract: A Predictably Selective Nitration of Olefin with Fe(NO3)3 and TEMPO.
Authors: Naveen Togati , Maity Soham , Sharma Upendra , Maiti Debabrata
Published: November 2013

This new nitration method using ferric nitrate and catalytic TEMPO gives the nitroolefins with excellent E‐selectivity.
ChemInform Abstract: TBAF‐Catalyzed Hydrosilylation for the Reduction of Aromatic Nitriles.
Authors: Bronschein Christoph , Werkmeister Svenja , Junge Kathrin , Beller Matthias
Published: November 2013

The hydrosilylation of aromatic nitriles (Ia‐f) and benzamide (III) yields primary amines under mild conditions.
ChemInform Abstract: Copper MOF: Scope and Limitation in Catalytic Hydroxylation and Nitration of Aryl Halides.
Authors: Priyadarshini S. , Joseph P. J. Amal , Kantam M. Lakshmi , Sreedhar B.
Published: November 2013

A copper metal organic framework is found to be a suitable catalyst for both the hydroxylation and nitration of aryl halides.
ChemInform Abstract: A 2,2′‐Bipyridine‐palladacycle Catalyzed the Coupling of Arylboronic Acids with Nitroarenes.
Authors: Peng Dongpo , Yu Ajuan , Wang Hailei , Wu Yangjie , Chang Junbiao
Published: November 2013

A novel protocol using the title catalyst for the synthesis of diaryl ethers via coupling of boronic acids with nitroarenes is developed.
ChemInform Abstract: Peptide‐Catalyzed Stereoselective Conjugate Addition Reactions Generating All‐Carbon Quaternary Stereogenic Centers.
Authors: Kastl Robert , Wennemers Helma
Published: November 2013

The diastereomeric mixture (1:1) of the peptide PEP is used as a trifluoroacetic acid salt in all reactions.
ChemInform Abstract: Chemoselective Benzylation of Unprotected Anthranilic Acids with Benzhydryl Alcohols by Water‐Soluble Au(III)/TPPMS in Water.
Authors: Hikawa Hidemasa , Suzuki Hideharu , Yokoyama Yuusaku , Azumaya Isao
Published: November 2013

The novel and efficient benzylation method is applicable to a number of anthranilic acids and various alcohols.
ChemInform Abstract: Three‐Component Metal‐Free Arylation of Isocyanides.
Authors: Basavanag Unnamatla M. V. , Dos Santos Aurelie , El Kaim Laurent , Gamez‐Montano Rocio , Grimaud Laurence
Published: November 2013

A new arylation of isocyanides with diazonium salts via an aryl nitrilium species as key intermediate is developed.
ChemInform Abstract: A Study of Aminoacid Esterification with Nonanol.
Authors: Simion Christian , Culetu Alina , Simion Alina Marieta
Published: November 2013

An effective procedure without the need for supplementary N‐protection/deprotection steps for the synthesis of the nonyl ester (III) is developed.
ChemInform Abstract: Chelation‐Assisted Cross‐Coupling of Anilines Through in situ Activation as Diazonium Salts with Boronic Acids under Ligand‐, Base‐, and Salt‐Free Conditions.
Authors: Joncour Roxan , Susperregui Nicolas , Pinaud Noel , Miqueu Karinne , Fouquet Eric , Sotiropoulos Jean‐Marc , Felpin Francois‐Xavier
Published: November 2013

A palladium‐catalyzed cross‐coupling of anilines with aryl boronic acids under ligand‐, base‐, and salt‐free conditions at room temperature is developed.
ChemInform Abstract: Lewis Acid Catalyzed SN2‐Type Ring Opening of N‐Activated Aziridines with Electron‐Rich Arenes/Heteroarenes.
Authors: Ghorai Manas K. , Tiwari Deo Prakash , Jain Nikita
Published: November 2013

A dia‐ and enantioselective route to 2‐arylethylamines via intermolecular ring opening of substituted N‐activated aziridines with electron‐rich arenes and heteroarenes is developed.
ChemInform Abstract: Flexible C2‐Symmetric Bis‐Sulfoxides as Ligands in Enantioselective 1,4‐Addition of Boronic Acids to Electron‐Deficient Alkenes.
Authors: Khiar Noureddine , Salvador Alvaro , Valdivia Victoria , Chelouan Ahmed , Alcudia Ana , Alvarez Eleuterio , Fernandez Inmaculada
Published: November 2013

An efficient bis‐sulfoxide ligand is developed for the title addition reaction.
ChemInform Abstract: ICI‐Induced Intramolecular Electrophilic Cyclization of 1‐[4′‐Methoxy(1,1′‐biphenyl)2‐yl]alkynones. A Facile Approach to Spiroconjugated Molecules.
Authors: Chen Yu , Liu Xiaochen , Lee Minwook , Huang Chenlong , Inoyatov Igor , Chen Zhiwei , Perl Abraham C. , Hersh William H.
Published: November 2013

The synthesis of the title compounds is described by an electrophilic ICl induced cyclization.
ChemInform Abstract: NBS‐Mediated Cyclization of trans‐Cinnamic Alcohols.
Authors: Chang Meng‐Yang , Tsai Chung‐Yu , Wu Ming‐Hao
Published: November 2013

A convenient procedure is presented for the synthesis of bromooxetanes through reduction of α,β‐unsaturated ketones and subsequent NBS mediated cyclization of the resulting trans‐cinnamic alcohols.
ChemInform Abstract: Synthesis of Polysubstituted Furans via Copper‐Mediated Annulation of Alkyl Ketones with α,β‐Unsaturated Carboxylic Acids.
Authors: Yang Yuzhu , Yao Jinzhong , Zhang Yuhong
Published: November 2013

A novel copper‐mediated annulation via an oxidative free‐radical process is presented.
ChemInform Abstract: Chemoselective Cascade Reaction of Glycidic Esters with 2‐Naphthol Derivatives Initiated by Stable Radical Cation Salt.
Authors: Huo Congde , An Jinzhu , Chang Wenju , Jia Xiaodong , Kang Lisheng , Wu Mingxia
Published: November 2013

The tandem Friedel—Crafts alkylation/cyclization reactions of glycidic esters with 2‐naphthols or 2‐naphthyl ethers are catalyzed by a stable aminium cation to give dihydronaphthofuran derivatives.
ChemInform Abstract: Iron‐Catalyzed Oxidative Radical Cross‐Coupling/Cyclization Between Phenols and Olefins.
Authors: Huang Zhiliang , Jin Liqun , Feng Ye , Peng Pan , Yi Hong , Lei Aiwen
Published: November 2013

A highly efficient, selective, environmentally friendly, atom‐economic, and mild procedure for the synthesis of dihydrobenzofurans from phenols and a broad range of substituted olefines is presented.
ChemInform Abstract: Regiocontrolled Synthesis of Polysubstituted Pyrroles Starting from Terminal Alkynes, Sulfonyl Azides, and Allenes.
Authors: Miura Tomoya , Hiraga Kentaro , Biyajima Tsuneaki , Nakamuro Takayuki , Murakami Masahiro
Published: November 2013

1‐Sulfonyl‐1,2,3‐triazoles, readily prepared from terminal alkynes and sulfonyl azides according to a known procedure, react with allenes in the presence of a nickel(0) catalyst to produce the corresponding isopyrroles.
ChemInform Abstract: Highly Enantioselective Monofluoromethylation of C2‐Arylindoles Using FBSM under Chiral Phase‐Transfer Catalysis.
Authors: Matsuzaki Kohei , Furukawa Tatsuya , Tokunaga Etsuko , Matsumoto Takashi , Shiro Motoo , Shibata Norio
Published: November 2013

The enantioselective addition of 1‐fluoro‐1,1‐bis(phenylsulfonyl)methane (II) to vinylogous imines generated in situ from 2‐aryl‐3‐(1‐arylsulfonylmethyl)indoles is achieved using chiral ammonium salts derived from cinchona alkaloids as phase‐transfer catalysts.
ChemInform Abstract: Copper(II) Ionic Liquid Catalyzed Cyclization—Aromatization of Hydrazones with Dimethyl Acetylenedicarboxylate: A Green Synthesis of Fully Substituted Pyrazoles.
Authors: Safaei Shirin , Mohammadpoor‐Baltork Iraj , Khosropour Ahmad Reza , Moghadam Majid , Tangestaninejad Shahram , Mirkhani Valiollah
Published: November 2013

An efficient procedure is elaborated for the synthesis of tetrasubstituted pyrazoles (IV) by cyclization—aromatization of aryl hydrazones (I) with aldehydes (II) and DMAD (III).
ChemInform Abstract: TEMPO‐Mediated Aliphatic C—H Oxidation with Oximes and Hydrazones.
Authors: Zhu Xu , Wang Yi‐Feng , Ren Wei , Zhang Feng‐Lian , Chiba Shunsuke
Published: November 2013

This method opens access towards highly substituted isoxazole and pyrazole skeletons under transition metal‐free conditions.
ChemInform Abstract: A Novel Task Specific & Thermally Stable Ionic Liquid (TBA Acetate) for the Synthesis of Pyran Annulated Heterocyclic System.
Authors: Riyaz Sd , Indrasena A. , Naidu A. , Dubey P. K.
Published: November 2013

An efficient and environmentally benign method using Bu4NOAc as ionic liquid for the synthesis of the title compounds is presented.
ChemInform Abstract: Iron‐Catalyzed Oxidative Tandem Reactions with TEMPO Oxoammonium Salts: Synthesis of Dihydroquinazolines and Quinolines.
Authors: Rohlmann Renate , Stopka Tobias , Richter Heinrich , Garica Mancheno Olga
Published: November 2013

This method uses a TEMPO oxoammonium salt (TBF) as a mild and nontoxic oxidant with readily available iron salts as catalysts for the synthesis of the title compounds.
ChemInform Abstract: Pd(II)‐Catalyzed C(sp2)—H Carbonylation of Biaryl‐2‐amine: Synthesis of Phenanthridinones.
Authors: Liang Zunjun , Zhang Jitan , Liu Zhanxiang , Wang Kai , Zhang Yuhong
Published: November 2013

A novel protocol for amine directed Pd‐catalyzed carbonylation of biaryls (I) is developed.
ChemInform Abstract: Synthesis of C8—N9 Annulated Purines by Iron‐Catalyzed C—H Amination.
Authors: Maes Jens , Rauws Tom R. M. , Maes Bert U. W.
Published: November 2013

A short synthesis for substituted annulated purine derivatives based on a Fe‐catalyzed direct amination reaction using oxygen as oxidant is developed.
ChemInform Abstract: Transition Metal Free Hydrolysis/Cyclization Strategy in a Single Pot: Synthesis of Fused Furo N‐Heterocycles of Pharmacological Interest.
Authors: Nakhi Ali , Rahman Md. Shafiqur , Seerapu Guru Pavan Kumar , Banote Rakesh Kumar , Kumar Kummari Lalith , Kulkarni Pushkar , Haldar Devyani , Pal Manojit
Published: November 2013

A tandem two‐step procedure for the synthesis of a series of furo[2,3‐b]quinoxalines (IV) and ‐pyrazines (VII) is developed involving selective monoalkynylation of corresponding o‐dichloropyrazines followed by intramolecular cyclization.
ChemInform Abstract: On Water: Silver‐Catalyzed Domino Approach for the Synthesis of Benzoxazine/Oxazine‐Fused Isoquinolines and Naphthyridines from o‐Alkynyl Aldehydes.
Authors: Verma Akhilesh K. , Choudhary Deepak , Saunthwal Rakesh K. , Rustagi Vineeta , Patel Monika , Tiwari Rakesh K.
Published: November 2013

A new environmentally friendly method for the synthesis of the title compounds is presented which uses inexpensive and readily available starting materials.
ChemInform Abstract: Synthesis of 4‐Membered Carbasugars by Way of Stereoselective SmI2‐Mediated Aldehyde—Alkene Cyclization.
Authors: Nocquet Pierre‐Antoine , Hazelard Damien , Gruntz Guillaume , Compain Philippe
Published: November 2013

The key step for the synthesis of new carbasugars is reported wherein cyclobutanes with four contiguous asymmetric centers are generated with a high level of stereocontrol.
ChemInform Abstract: Structure, Absolute Configuration, and Conformational Study of 12‐Membered Macrolides from the Fungus Dendrodochium sp. Associated with the Sea Cucumber Holothuria nobilis Selenka
Authors: Sun Peng , Xu Dong‐Xiao , Mandi Attila , Kurtan Tibor , Li Tie‐Jun , Schulz Barbara , Zhang Wen
Published: November 2013

isolation, structure determination and cytotoxicity of 13 new 12‐membered macrolides, dendrodolides A—M
ChemInform Abstract: Structure‐Enhanced Photocatalytic Removal of CrVI by a TiO2 Superstructure with Ultrathin Rutile Nanorods and Abundant {110} Faces.
Authors: Xu Sichao , Zhang Yunxia , Wang Shuan , Xu Junmin , Ding Hualin , Li Guanghai
Published: November 2013

Single‐crystalline ultrathin, sea‐urchin‐like TiO2 nanorods with a diameter of several nanometers and length up to 200 nm are synthesized from mixtures of TiOSO4, EtOH, H2O, and glycerol (autoclave, 150 °C, 36 h).
ChemInform Abstract: 25th Anniversary Article: Colloidal Quantum Dot Materials and Devices: A Quarter‐Century of Advances
Authors: Kim Jin Young , Voznyy Oleksandr , Zhitomirsky David , Sargent Edward H.
Published: November 2013

Review: 216 refs.
ChemInform Abstract: Upconversion‐Nanophosphor‐Based Functional Nanocomposites
Authors: Feng Wei , Han Chunmiao , Li Fuyou
Published: November 2013

Review: < 100 refs.
ChemInform Abstract: Mixed AggregAte (MAA): A Single Concept for All Dipolar Organometallic Aggregates. 1. Structural Data
Authors: Harrison‐Marchand Anne , Mongin Florence
Published: November 2013

Review: structures of organo(bi)metallic species; 826 refs.
ChemInform Abstract: Stereoselective Synthesis with Carbon Dioxide
Authors: Kielland Nicola , Whiteoak Christopher J. , Kleij Arjan W.
Published: November 2013

Review: 138 refs.
ChemInform Abstract: Bioorthogonal Labelling of Biomolecules: New Functional Handles and Ligation Methods
Authors: Debets Marjoke F. , van Hest Jan C. M. , Rutjes Floris P. J. T.
Published: November 2013

Review: 135 refs.
ChemInform Abstract: Thiols, Thioethers, and Related Compounds as Sources of C‐Centred Radicals
Authors: Denes Fabrice , Schiesser Carl H. , Renaud Philippe
Published: November 2013

Review: 260 refs.
ChemInform Abstract: New Strategies for Transition‐Metal‐Catalyzed C—P Bond Formation
Authors: Li Ya‐Min , Yang Shang‐Dong
Published: November 2013

Review: 15 refs.
ChemInform Abstract: (3′—5′)‐Cyclic Dinucleotides: Synthetic Strategies and Biological Potential
Authors: Clivio Pascale , Coantic‐Castex Stephanie , Guillaume Dominique
Published: November 2013

Review: 193 refs.
ChemInform Abstract: Natural Sesquiterpenoids
Authors: Fraga Braulio M.
Published: November 2013

Review: isolation, structural determination, synthesis, chemical and microbiological tansformations; literature from 2012; 499 refs.
ChemInform Abstract: New Types of ′Combined′ Pericyclic Reactions
Authors: Magdesieva T. V.
Published: November 2013

Review: 115 refs.
ChemInform Abstract: Recent Progress in Supercapacitors: From Materials Design to System Construction
Authors: Wang Yonggang , Xia Yongyao
Published: November 2013

Review: 54 refs.
ChemInform Abstract: Polymorphism of Acylglycerols: A Stereochemical Perspective
Authors: Craven R. John , Lencki Robert W.
Published: November 2013

Review: 80 refs.
ChemInform Abstract: The Chemistry and Biology of Soluble Guanylate Cyclase Stimulators and Activators
Authors: Follmann Markus , et al. et al.
Published: November 2013

Review: 163 refs.
ChemInform Abstract: Developing Polymer Composite Materials: Carbon Nanotubes or Graphene?
Authors: Sun Xuemei , Sun Hao , Li Houpu , Peng Huisheng
Published: November 2013

Review: 133 refs.
ChemInform Abstract: Silicon Nanowires for Biosensing, Energy Storage, and Conversion
Authors: Wang Yanli , Wang Tianyu , Da Peimei , Xu Ming , Wu Hao , Zheng Gengfeng
Published: November 2013

Review: 210 refs.
ChemInform Abstract: Rational Design of Anode Materials Based on Group IVA Elements (Si, Ge, and Sn) for Lithium‐Ion Batteries
Authors: Wu Xing‐Long , Guo Yu‐Guo , Wan Li‐Jun
Published: November 2013

Review: 133 refs.
ChemInform Abstract: Direct Chemical Dynamics Simulations: Coupling of Classical and Quasiclassical Trajectories with Electronic Structure Theory
Authors: Paranjothy Manikandan , Sun Rui , Zhuang Yu , Hase William L.
Published: November 2013

Review: 123 refs.
ChemInform Abstract: Ozawa′s Kinetic Method for Analyzing Thermoanalytical Curves — History and Theoretical Fundamentals
Authors: Koga Nobuyoshi
Published: November 2013

Review: 140 refs.
ChemInform Abstract: Modern Quantum Chemical Methods for Calculating Spin‐Spin Coupling Constants: Theoretical Basis and Structural Applications in Chemistry
Authors: Rusakov Yu. Yu. , Krivdin L. B.
Published: November 2013

Review: 288 refs.
ChemInform Abstract: A Simple BODIPY—Imidazole‐Based Probe for the Colorimetric and Fluorescent Sensing of Cu(II) and Hg(II)
Authors: Xie Rongjian , Yi Yunrui , He Yuan , Liu Xingang , Liu Zhan‐Xiang
Published: November 2013

Review: 22 refs.
ChemInform Abstract: NMR and EPR Spectroscopy of Paramagnetic Metalloporphyrins and Heme Proteins
Authors: Walker F. Ann
Published: November 2013

Review: 1027 refs.
ChemInform Abstract: In situ Raman Spectroscopy of Catalysts: Examples from Current Research
Authors: Hess Christian
Published: November 2013

Review: 40 refs.
The Adult Macaque Spinal Cord Central Canal Zone Contains Proliferative Cells And Closely Resembles The Human
Authors: Alfaro‐Cervello Clara , Cebrian‐Silla Arantxa , Soriano‐Navarro Mario , Garcia‐Tarraga Patricia , Matías‐Guiu Jorge , Gomez‐Pinedo Ulises , Molina Aguilar Pilar , Alvarez‐Buylla Arturo , Luquin Maria‐Rosario , Garcia‐Verdugo Jose Manuel
Published: November 2013

The persistence of proliferative cells, which could correspond to progenitor populations or potential cells of origin for tumors, has been extensively studied in the adult mammalian forebrain, including human and nonhuman primates. Proliferating cells have been found along the entire ventricular system, including around the central canal, of rodents, but little is known about the primate spinal cord. Here we describe the central canal cellular composition of the Old World primate Macaca fascicularis via scanning and transmission electron microscopy and immunohistochemistry and identify central canal proliferating cells with Ki67 and newly generated cells with bromodeoxyuridine incorporation 3 months after the injection. The central canal is composed of uniciliated, biciliated, and multiciliated ependymal cells, astrocytes, and neurons. Multiciliated ependymal cells show morphological characteristics similar to multiciliated ependymal cells from the lateral ventricles, and uniciliated and biciliated ependymal cells display cilia with large, star‐shaped basal bodies, similar to the Ecc cells described for the rodent central canal. Here we show that ependymal cells with one or two cilia, but not multiciliated ependymal cells, proliferate and give rise to new ependymal cells that presumably remain in the macaque central canal. We found that the infant and adult human spinal cord contains ependymal cell types that resemble those present in the macaque. Interestingly, a wide hypocellular layer formed by bundles of intermediate filaments surrounded the central canal both in the monkey and in the human, being more prominent in the stenosed adult human central canal. J. Comp. Neurol. 522:1800–1817, 2014. © 2013 Wiley Periodicals, Inc.
Synthesis and Third‐Order Nonlinear Optical Properties of Triphenylene Derivatives Modified by Click Chemistry
Authors: Mi Yongsheng , Liang Pengxia , Jin Zhaokui , Wang Dong , Yang Zhou
Published: November 2013

A series of asymmetric triphenylene derivatives containing typical D–π–A structures is successfully synthesized by means of [2+2] cycloaddition–cycloreversion click reactions. The photophysical and electrochemical properties, as well as the click reactions, are characterized by means of UV/Vis absorption spectroscopy, cyclic voltammetry, and DFT modulations. In addition, the third‐order nonlinear properties, including the nonlinear absorption and the nonlinear susceptibilities, are investigated by using Z‐scan techniques. A typical reverse saturable absorption–saturable absorption behavior is observed for the third‐order nonlinear absorption, with the third‐order nonlinear susceptibilities of the compounds being 1.05×10−12, −1.50×10−12, and −0.52×10−12 esu, respectively.
Superoleophobic Meshes with Relatively Low Hysteresis and Sliding Angles by Electropolymerization: Importance of Polymer‐Growth Control
Authors: Darmanin Thierry , Tarrade Jeanne , Celia Elena , Bellanger Herve , Guittard Frederic
Published: November 2013

To study the effects of polymer growth and polymer nanostructure formation on stainless‐steel meshes (opening size of 100 μm), we report the behavior of three electrodeposited polymers with varied deposition charge to achieve superoleophobic meshes with low adhesion (low hysteresis (H) and sliding angles (α)). We show the importance of controlling the polymer growth around the mesh wires (two‐dimensional growth) to avoid the re‐covering of the mesh openings. Indeed, both the polymer micro‐/nanostructures as well as the presence of the holes are necessary to highly reduce the solid–liquid contact area and to achieve superoleophobic properties with low adhesion. Herein, with the best polymer, superoleophobic properties are obtained with apparent contact angles of 160° for sunflower oil (H=13°, α=10°), 155° for hexadecane (H=29°, α=30°), 143° for dodecane (sticking behavior), and 134° for decane (sticking behavior).
Perceptual narrowing during infancy: A comparison of language and faces
Authors: Maurer Daphne , Werker Janet F.
Published: November 2013

In this article, we begin with a summary of the evidence for perceptual narrowing for various aspects of language (e.g., vowel and consonant contrasts, tone languages, visual language, sign language) and of faces (e.g., own species, own race). We then consider possible reasons for the apparent differences in the timing of narrowing (e.g., apparently earlier for own race than for own species). Throughout we consider whether the evidence fits a model of maintenance/loss or is better characterized as enhancement/attunement to exposed categories. Finally, we consider evidence on the malleability of the timing and its implications for the role of endogenous factors versus learning in controlling when narrowing occurs. Overall, the comparison across domains revealed many similarities but also striking differences which lead to suggestions for future research. © 2013 Wiley Periodicals, Inc. Dev Psychobiol 56: 154–178, 2014.
The chick embryo as an expanding experimental model for cancer and cardiovascular research
Authors: Kain Kristin H. , Miller James W.I. , Jones‐Paris Celestial R. , Thomason Rebecca T. , Lewis John D. , Bader David M. , Barnett Joey V. , Zijlstra Andries
Published: November 2013

A long and productive history in biomedical research defines the chick as a model for human biology. Fundamental discoveries, including the description of directional circulation propelled by the heart and the link between oncogenes and the formation of cancer, indicate its utility in cardiac biology and cancer. Despite the more recent arrival of several vertebrate and invertebrate animal models during the last century, the chick embryo remains a commonly used model for vertebrate biology and provides a tractable biological template. With new molecular and genetic tools applied to the avian genome, the chick embryo is accelerating the discovery of normal development and elusive disease processes. Moreover, progress in imaging and chick culture technologies is advancing real‐time visualization of dynamic biological events, such as tissue morphogenesis, angiogenesis, and cancer metastasis. A rich background of information, coupled with new technologies and relative ease of maintenance, suggest an expanding utility for the chick embryo in cardiac biology and cancer research. Developmental Dynamics 243:216–228, 2014. © 2013 Wiley Periodicals, Inc.
The role of Pygopus in the differentiation of intracardiac valves in Drosophila
Authors: Tang Min , Yuan Wuzhou , Bodmer Rolf , Wu Xiushan , Ocorr Karen
Published: November 2013

Cardiac valves serve an important function; they support unidirectional blood flow and prevent blood regurgitation. Wnt signaling plays an important role in the formation of mouse cardiac valves and cardiac valve proliferation in Zebrafish, but identification of the specific signaling components involved has not been addressed systematically. Of the components involved in Wnt signal transduction, pygopus (pygo), first identified as a core component of Wnt signaling in Drosophila, has not yet to be investigated with respect to valve development and differentiation. Here, we take advantage of the Drosophila heart model to study the role of pygo in formation of valves between the cardiac chambers. We found that cardiac‐specific pygo knockdown in the Drosophila heart causes dilation in the region of these cardiac valves, and their characteristic dense mesh of myofibrils does not form and resembles that of neighboring cardiomyocytes. In contrast, heart‐specific knockdown of the transcription factors, arm/β‐Cat, lgs/BCL9, or pan/TCF, which mediates canonical Wnt signal transduction, shows a much weaker valve differentiation defect. Double‐heterozygous combinations of mutants for pygo and the Wnt‐signaling components have no additional effect on heart function compared with pygo heterozygotes alone. These results are consistent with the idea that pygo functions independently of canonical Wnt signaling in the differentiation of the adult interchamber cardiac valves. genesis 52:19–28, 2014. © 2013 Wiley Periodicals, Inc.
Bisphenol A‐associated alterations in the expression and epigenetic regulation of genes encoding xenobiotic metabolizing enzymes in human fetal liver
Authors: Nahar Muna S. , Kim Jung H. , Sartor Maureen A. , Dolinoy Dana C.
Published: November 2013

Alterations in xenobiotic metabolizing enzyme (XME) expression across the life course, along with genetic, nutritional, and environmental regulation, can influence how organisms respond to toxic insults. In this study, we investigated the hypothesis that in utero exposure to the endocrine active compound, bisphenol A (BPA), influences expression and epigenetic regulation of phase I and II XME genes during development. Using healthy 1st to 2nd trimester human fetal liver specimens quantified for internal BPA levels, we examined XME gene expression using PCR Array (n = 8) and RNA‐sequencing (n = 12) platforms. Of the greater than 160 XME genes assayed, 2 phase I and 12 phase II genes exhibited significantly reduced expression with higher BPA levels, including isoforms from the carboxylesterase, catechol O‐methyltransferase, glutathione S‐transferase, sulfotransferase, and UDP‐glucuronosyltransferase families. When the promoters of these candidate genes were evaluated in silico, putative binding sites for the E‐twenty‐six (ETS) and activator protein1 (AP1) related transcription factor families were identified and unique to 97% of all candidate transcripts. Interestingly, many ETS binding sites contain cytosine‐guanine dinucleotides (CpGs) within their consensus sequences. Thus, quantitative analysis of CpG methylation of three candidate genes was conducted across n = 50 samples. Higher BPA levels were associated with increased site‐specific methylation at COMT (P < 0.005) and increased average methylation at SULT2A1 (P < 0.020) promoters. While toxicological studies have traditionally focused on high‐dose effects and hormonal receptor mediated regulation, our findings suggest the importance of low‐dose effects and nonclassical mechanisms of endocrine disruption during development. Environ. Mol. Mutagen. 55:184–195, 2014. © 2013 Wiley Periodicals, Inc.
The occurrence and fate of chemicals of emerging concern in coastal urban rivers receiving discharge of treated municipal wastewater effluent
Authors: Sengupta Ashmita , Lyons J. Michael , Smith Deborah J. , Drewes Jörg E. , Snyder Shane A. , Heil Ann , Maruya Keith A.
Published: November 2013

To inform future monitoring and assessment of chemicals of emerging concern (CECs) in coastal urban watersheds, the occurrence and fate of more than 60 pharmaceuticals and personal care products (PPCPs), commercial/household chemicals, current-use pesticides, and hormones were characterized in 2 effluent-dominated rivers in southern California (USA). Water samples were collected during 2 low-flow events at locations above and below the discharge points of water reclamation plants (WRPs) and analyzed using gas chromatography–mass spectrometry and liquid chromatography–tandem mass spectrometry. Approximately 50% of targeted CECs were detectable at stations downstream from WRPs, compared with <31% and <10% at the reference stations above the WRPs. Concentrations of chlorinated phosphate flame retardants were highest among the CECs tested, with mean total aggregate concentrations of tris(2-chloroethyl) phosphate (TCEP), tris(1-chloro-2-propyl) phosphate (TCPP), and tris(1,3-dichloro-2-propyl) phosphate (TDCPP) of 3400 ng/L and 2400 ng/L for the 2 rivers. Maximum in-stream concentrations of pyrethroids (bifenthrin and permethrin), diclofenac, and galaxolide exceeded risk-based thresholds established for monitoring of CECs in effluent-dominated receiving waters. In contrast, maximum concentrations of PPCPs commonly detected in treated wastewater (e.g., acetaminophen, N,N,diethyl-meta-toluamide [DEET], and gemfibrozil) were less than 10% of established thresholds. Attenuation of target CECs was not observed downstream of WRP discharge until dilution by seawater occurred in the tidal zone, partly because of the short hydraulic residence times in these highly channelized systems (<3 d). In addition to confirming CECs for future in-stream monitoring, these results suggest that conservative mass transport is an important boundary condition for assessment of the input, fate, and effects of CECs in estuaries at the bottom of these watersheds. Environ Toxicol Chem 2014;33:350–358. © 2013 SETAC
Model for the Degradation Performance of a Single‐Cell Direct Methanol Fuel Cell under Varying Operational Conditions
Authors: Kianimanesh A. , Yang Q. , Park S. S. , Xue D. , Freiheit T.
Published: November 2013

The effect of varying operating parameters on the degradation of a single‐cell direct methanol fuel cell (DMFC) with serpentine flow channels was investigated. Fuel cell internal temperature, methanol concentration, and air and methanol flow rates were varied in experimental tests and fuel cell performance was chronologically recorded. A DMFC semi‐empirical performance model was developed to predict the polarization curves of the DMFC and validated at different operating conditions. Performance degradation was observed and modeled over time by a linear regression model. Unlike previous studies, the cumulative exposure of the operating factors to the fuel cell was considered in the degradation analysis. The degradation model shows the cell voltage generation capacity does not significantly degrade. However, the Tafel slope of the cell changes with cumulative exposure to methanol concentration and air flow, and the ohmic resistance changes with cumulative exposure to temperature, methanol and air flow.
Preparation and Characterization of Semi‐IPN Fluorine Containing Polybenzimidazole/Nafion Composite Membrane for Fuel Cells
Authors: Chang Z. , Pu* H. , Zhao Z. , Pan H. , Li B. , Wan D.
Published: November 2013

A facile way to prepare semi‐interpenetrating polymer network (semi‐IPN) membrane which adopted 1,3‐benzenedisulfonyl azide (1,3‐BDSA) to crosslink with fluorine containing polybenzimidazole (Aliphatic‐16F‐PBI) in the Aliphatic‐16F‐PBI/Nafion composite membranes was proposed. By means of Fourier transformed infrared (FTIR) spectra analysis, the possible crosslinking reaction mechanism was investigated. Results suggested that 1,3‐BDSA molecule loses a nitrogen and forms nitrene upon heating. Then this nitrene reacts with C–H bond of Aliphatic‐16F‐PBI. Scanning electron microscope (SEM) images showed that the compatibility of PBI and Nafion improved while hexadecafluoro‐octyl groups were implanted into Aliphatic‐16F‐PBI molecule. The properties of Aliphatic‐16F‐PBI/Nafion composite membranes for fuel cell applications were determined through tests of gel fraction, thermogravimetry (TG), dimensional stability, mechanical property and proton conductivity. The gel fraction could reach 27.9% when 7.4% 1,3‐BDSA was added into the composite membranes. The proton conductivity of the semi‐IPN Aliphatic‐16F‐PBI/Nafion composite membranes could reach 0.69 × 10–2 S cm–1 at 120 °C at 100% relative humidity. Such high crosslink degree resulted in the improvement of the tensile strength, dimensional stability and chemical oxidative stability of semi‐IPN Aliphatic‐16F‐PBI/Nafion composite membranes. Nonetheless, it had little effect on the thermal stability.
Histologic and systemic prognosticators for local control and survival in margin‐negative transoral laser microsurgery treated oral cavity squamous cell carcinoma
Authors: Sinha Parul , Mehrad Mitra , Chernock Rebecca D. , Lewis James S. , El‐Mofty Samir K. , Wu Ningying , Nussenbaum Brian , Haughey Bruce H.
Published: November 2013

Background

Appreciable local recurrence rates observed in patients with margin‐negative, transoral laser microsurgery (TLM)‐treated oral cavity squamous cell carcinoma (SCC) necessitate identification of new prognosticators for local control and survival. A histopathologic index (Brandwein–Gensler score [BGS]) and intrinsic/iatrogenic/chronic conditions causing immune compromise are investigated.

Methods

From a prospectively assembled database of TLM‐treated oral cavity SCC, specimens for 60 patients with a minimum of 2‐years follow‐up could undergo BGS assignment. Local control, disease‐specific survival (DSS), and overall survival (OS) were study endpoints.

Results

“Low‐BGS” was recorded in 28 patients (47%) and “high‐BGS” in 32 patients (53%), whereas immune compromise was observed in 18%. In multivariate analyses, immune compromise was the only predictor for local control. T classification and immune compromise were prognostic for DSS and OS. “High‐BGS” was prognostic only for OS.

Conclusion

“High‐BGS” was associated with recurrences but immune compromise was the most significant predictor of local control and survival in margin‐negative, TLM‐treated oral cavity SCC. Strategies that maintain/restore tumor‐specific immune responses in immune compromised oral cavity SCC hosts need to be developed. © 2014 Wiley Periodicals, Inc. Head Neck 37: 52–63, 2015
Activity of the hypoxia‐activated pro‐drug TH‐302 in hypoxic and perivascular regions of solid tumors and its potential to enhance therapeutic effects of chemotherapy
Authors: Saggar Jasdeep K. , Tannock Ian F.
Published: November 2013

Many chemotherapy drugs have poor therapeutic activity in regions distant from tumor blood vessels because of poor tissue penetration and low cytotoxic activity against slowly‐proliferating cells. The hypoxia‐activated pro‐drug TH‐302 may have selective toxicity for hypoxic and neighboring cells in tumors. Here we characterize the spatial distribution and ability of TH‐302 to selectively target hypoxic regions and complement the effect of doxorubicin and docetaxel by modifying biomarker distribution. Athymic nude mice bearing human breast MCF‐7 or prostate PC‐3 tumors were treated with doxorubicin or docetaxel respectively and TH‐302 alone or in combination. Biomarkers of drug effect including γH2aX (a marker of DNA damage), cleaved caspase‐3 or ‐6 (markers of apoptosis) and reduction in Ki‐67 (a marker of cell proliferation) were quantified in tumor sections in relation to functional blood vessels (recognized by DiOC7) and hypoxia (recognized by EF5) using immunohistochemistry. γH2aX expression at 10 min and cleaved caspase‐3 or ‐6 at 24 hr after doxorubicin or docetaxel decreased with increasing distance from tumor blood vessels, with minimal expression in hypoxic regions; maximum reduction in Ki67 levels was observed in regions closest to vasculature at 24 hr. TH‐302 induced maximal cell damage in hypoxic and neighboring regions, but was also active in tumor regions closer to blood vessels. TH‐302 given 4 hr before doxorubicin or docetaxel increased DNA damage and apoptosis throughout the tumor compared to chemotherapy alone. When given with doxorubicin or docetaxel, TH‐302 complements and enhances anticancer effects in both perivascular and hypoxic regions but also increases toxicity.
Physicochemical modulation of chitosan‐based hydrogels induces different biological responses: Interest for tissue engineering
Authors: Rami Lila , Malaise Sebastien , Delmond Samantha , Fricain Jean‐Christophe , Siadous Robin , Schlaubitz Silke , Laurichesse Eric , Amédée Joëlle , Montembault Alexandra , David Laurent , Bordenave Laurence
Published: November 2013

Polysaccharide‐based hydrogels are remarkable materials for the development of tissue engineering strategies as they meet several critical requirements for such applications and they may partly mimic the extracellular matrix. Chitosan is widely envisioned as hydrogel in biomedical fields for its bioresorbability, biocompatibility, and fungistatic and bacteriostatic properties. In this study, we report that the modulation of the polymer concentration, the degree of acetylation, the gelation processes [or neutralization routes (NR)] in the preparation of different chitosan‐based hydrogels lead to substantially and significantly different biological responses. We show that it is possible to tune the physicochemical characteristics, mechanical properties, and biological responses of such matrices. Physical hydrogels prepared from highly acetylated chitosan were softer, degraded quickly in vivo, and were not suitable for in vitro culture of human mesenchymal stem and progenitor derived endothelial cells. In contrast, for a same chitosan concentration and obtained by the same processing route, a low degree of acetylation chitosan hydrogel provided a more elastic material, better cell adhesion on its surface and tissue regeneration, and restored tissue neo‐vascularization as well. This work offers promising and innovative perspectives for the design of hydrogel materials with tunable properties for tissue engineering and regenerative medicine. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 3666–3676, 2014.