bluuebunny/crossref_metadata_2025_split huggingface dataset:
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

AbstractIn situ cyclometalation of acetophenone imine ADI with the Ir—PHOX complexes (I) yields highly active and selective catalyst for the title reaction.
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

AbstractA 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

AbstractVarious 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

AbstractThe 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

AbstractWith 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

AbstractThis method allows the highly enantioselective substitution of racemic allylic alcohols with potassium alkynyltrifluoroborates with excellent branched‐to‐linear selectivity.
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

AbstractA 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

AbstractThis 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

AbstractThe 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

AbstractA 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

AbstractA novel protocol using the title catalyst for the synthesis of diaryl ethers via coupling of boronic acids with nitroarenes is developed.
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

AbstractThe 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

AbstractA new arylation of isocyanides with diazonium salts via an aryl nitrilium species as key intermediate 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

AbstractA 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

AbstractA 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

AbstractAn 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

AbstractThe 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

AbstractA 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

AbstractA 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

AbstractThe 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

AbstractA 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

Abstract1‐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

AbstractThe 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

AbstractAn 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

AbstractThis 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

AbstractAn 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

AbstractThis 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

AbstractA 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

AbstractA 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

AbstractA 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

AbstractA 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

AbstractThe 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

Abstractisolation, 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

AbstractSingle‐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).
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

ABSTRACTThe 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

AbstractA 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

AbstractTo 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

AbstractIn 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 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

AbstractCardiac 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.
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

Abstract

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 &lt;31% and &lt;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 (&lt;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