bluuebunny/crossref_metadata_2025_split huggingface dataset:
The use of underwater high‐voltage discharges to improve the efficiency of Jatropha curcasL. biodiesel production
Authors: Maroušek Josef , Itoh Shigeru , Higa Osamu , Kondo Yoshikazu , Ueno Masami , Suwa Ryuichi , Komiya Yasuaki , Tominaga Jun , Kawamitsu Yoshinobu 
Published: December 2012

AbstractUnderwater high‐voltage discharges (3.5 kV) resulting in 4.9 kJ shock waves (50–60 MPa) were studied at the laboratory scale as a Jatropha curcas L. seed disintegration method. Grinding and macerating in an excess of methanol (3.5:1) was advantageous because methanol acts both as a liquid carrier for the pressure shock waves and as a solvent that increases the efficiency of oil extraction while remaining usable for esterification. The influence of the number of shock waves and the intensity of methanol maceration on the heat values of the pressed cake are stated in detail. Soxhlet extraction demonstrated that a greater than 94% oil extraction was achieved. The increased disintegration of vacuoles rich in oil was documented by surface area analysis, mineralization kinetics analysis, and electron microscopy. The working volumes were small, and the proportion of energy inadequate compared to the yields released; however, much can be improved by upgrading the process.
Biochemical characterization of two recombinant ferredoxin reductases from Alcanivorax borkumensis SK2
Authors: Teimoori Afsaneh , Ahmadian Shahin , Madadkar‐Sobhani Armin 
Published: December 2012

AbstractAlcanivorax borkumensis strain SK2 is a cosmopolitan oil‐degrading oligotrophic marine γ‐proteobacterium that exclusively uses petroleum hydrocarbons as sources of carbon and energy. Its ubiquity and unusual physiology suggest its global importance in the removal of hydrocarbons from polluted marine systems. The genome of A. borkumensis SK2 was recently sequenced. Two ferredoxin–nicotinamide adenine dinucleotide phosphate (NADPH) reductase genes (ABO_0145 and ABO_0203) have been annotated for this bacterium. In the present study, the expression, purification, and kinetic properties of these two genes were explored by constructing the prokaryotic expression vectors (pET21a) for the first time. Isopropyl β‐d‐thiogalactoside (0.5 mM) was used for induction of exponentially growing cells (30 °C, overnight). Most of the proteins were expressed in inclusion body. Partial purification of recombinant enzymes was performed by ion‐exchange chromatography on a DEAE‐sepharose column using only one linear gradient of sodium chloride ranging between 0 and 500 mM. The recombinant enzymes displayed reductase activity, which was optimal at pH 6.0 and 45 °C. Ferredoxin–NADPH reductases exhibited several outstanding properties that made them excellent model proteins to address broad biological questions. This study serves as the basis for further investigations of the biotechnological potential of these enzymes.
Toward reduction in animal sacrifice for drugs: Molecular modeling of Macaca fascicularis P450 2C20 for virtual screening of Homo sapiens P450 2C8 substrates
Authors: Rua Francesco , Di Nardo Giovanna , Sadeghi Sheila J. , Gilardi Gianfranco 
Published: December 2012

AbstractMacaca fascicularis P450 2C20 shares 92% identity with human cytochrome P450 2C8, which is involved in the metabolism of more than 8% of all prescribed drugs. To date, only paclitaxel and amodiaquine, two substrate markers of the human P450 2C8, have been experimentally confirmed as M. fascicularis P450 2C20 drugs. To bridge the lack of information on the ligands recognized by M. fascicularis P450 2C20, in this study, a three‐dimensional homology model of this enzyme was generated on the basis of the available crystal structure of the human homologue P450 2C8 using YASARA. The results indicated that 90.0%, 9.0%, 0.5%, and 0.5% of the residues of the P450 2C20 model were located in the most favorable, allowed, generously allowed, and disallowed regions, respectively. The root‐mean‐square deviation of the C‐alpha superposition of the M. fascicularis P450 2C20 model with the Homo sapiens P450 2C8 was 0.074 Å, indicating a very high similarity of the two structures. Subsequently, the 2C20 model was used for in silico screening of 58 known P450 2C8 substrates and 62 inhibitors. These were also docked in the active site of the crystal structure of the human P450 2C8. The affinity of each compound for the active site of both cytochromes proved to be very similar, meaning that the few key residues that are mutated in the active site of the M. fascicularis P450 do not prevent the P450 2C20 from recognizing the same substrates as the human P450 2C8.
KCl:Dy phosphor for thermoluminescence dosimetry of ionizing radiation
Authors: Bhujbal P M , Dhoble S J 
Published: December 2012

ABSTRACTThe thermoluminescence (TL) characterizations of γ‐irradiated KCl:Dy phosphor for radiation dosimetry are reported. All phosphors were synthesized via a wet chemical route. Minimum fading of TL intensity is recorded in the prepared material. TL in samples containing different concentrations of Dy impurity was studied at different γ‐irradiation doses. Peak TL intensities varied sublinearly with γ‐ray dose in all samples, but were linear between 0.08 to 0.75 kGy for the KCl:Dy (0.1 mol%) sample. This material may be useful for dosimetry within this range of γ‐ray dose. TL peak height was found to be dependant on the concentration (0.05–0.5 mol%) of added Dy in the host. Copyright © 2012 John Wiley & Sons, Ltd.
Effect of pressure‐assisted thermal annealing on the optical properties of ZnO thin films
Authors: Berger Danielle , Kubaski Evaldo Toniolo , Sequinel Thiago , da Silva Renata Martins , Tebcherani Sergio Mazurek , Varela José Arana 
Published: December 2012

ABSTRACTZnO thin films were prepared by the polymeric precursor method. The films were deposited on silicon substrates using the spin‐coating technique, and were annealed at 330 °C for 32 h under pressure‐assisted thermal annealing and under ambient pressure. Their structural and optical properties were characterized, and the phases formed were identified by X‐ray diffraction. No secondary phase was detected. The ZnO thin films were also characterized by field‐emission scanning electron microscopy, Fourier transform infrared spectroscopy, photoluminescence and ultraviolet emission intensity measurements. The effect of pressure on these thin films modifies the active defects that cause the recombination of deep level states located inside the band gap that emit yellow–green (575 nm) and orange (645 nm) photoluminescence. Copyright © 2012 John Wiley & Sons, Ltd.
Aldehyde‐Assisted Hydrogen Transfer during the Formation of Hydride–Iridafurans from Alkynes and Aldehydes
Authors: Posadas Cristina M. , Rendón Nuria , López‐Serrano Joaquín , Hernández Yohar A. , Álvarez Eleuterio , Paneque Margarita , Poveda Manuel L. 
Published: December 2012

AbstractThe bis(ethylene) IrI complex [TpIr(C2H4)2] (1; Tp=hydrotris(3,5‐dimethylpyrazolyl)borate) reacts with two equivalents of aromatic or aliphatic aldehydes in the presence of one equivalent of dimethyl acetylenedicarboxylate (DMAD) with ultimate formation of hydride iridafurans of the formula [TpIr(H){C(R1)C(R2)C(R3)O}] (R1=R2=CO2Me; R3=alkyl, aryl; 3). Several intermediates have been observed in the course of the reaction. It is proposed that the key step of metallacycle formation is a CC coupling process in the undetected IrI species [TpIr{η1‐O‐R3C(O)H}(DMAD)] (A) to give the trigonal‐bipyramidal 16 e− IrIII intermediates [TpIr{C(CO2Me)C(CO2Me)C(R3)(H)O}] (C), which have been trapped by NCMe to afford the adducts 11 (R3=Ar). If a second aldehyde acts as the trapping reagent for these species, this ligand acts as a shuttle in transfering a hydrogen atom from the γ‐ to the α‐carbon atom of the iridacycle through the formation of an alkoxide group. Methyl propiolate (MP) can be used instead of DMAD to regioselectively afford the related iridafurans. These reactions have also been studied by DFT calculations.
Topology Switching in [32]Heptaphyrins Controlled by Solvent, Protonation, and meso Substituents
Authors: Alonso Mercedes , Geerlings Paul , De Proft Frank 
Published: December 2012

AbstractThe switching of topology between “figure‐eight”, Möbius, and untwisted conformations in [32]heptaphyrins(1.1.1.1.1.1.1) has been investigated by using density functional theory calculations. Such a change is achieved by variation of one internal dihedral angle and, if properly controlled, can provide access to molecular switches with unique optical and magnetic properties. In this work, we have explored different conformational control methods, such as solvent, protonation and meso substituents. Despite its antiaromatic character, most of the [32]heptaphyrins (R=H, CH3, CF3, Ph, C6F5) adopt a figure‐eight conformation in the neutral state, owing to their more‐effective hydrogen‐bonding interactions. The aromatic Möbius topology is only preferred with dichlorophenyl groups, which minimize the steric hindrance that arises from the bulky chlorine atoms. The conformational equilibrium is sensitive to the solvent, so polar solvents, such as DMSO, further stabilize the Möbius conformation. Protonation induces a conformational change into the Möbius topology, irrespective of the meso‐aryl groups. In the triprotonated species, the conformational switch is blocked and a non‐twisted conformer becomes much more stable than the figure‐eight conformation. We have shown that the relative energies of the protonated [32]heptaphyrins are dominated by aromaticity. Importantly, this topology switching induces a dramatic change in the magnetic properties and reactivity of the macrocycles, as revealed by several energetic, magnetic, structural, and reactivity indices of aromaticity.
A Heterobimetallic Approach To Stabilize the Elusive Disulfur Radical Trianion (“Subsulfide”) ${{\rm S}{{{{\bullet}}3- \hfill \atop 2\hfill}}}$
Authors: Yao Shenglai , Hrobárik Peter , Meier Florian , Rudolph Robert , Bill Eckhard , Irran Elisabeth , Kaupp Martin , Driess Matthias 
Published: December 2012

AbstractA unique heterobimetallic disulfur monoradical, complex2, with a diamond‐shaped {NiS2Pt} core has been synthesized by two‐electron reduction of a supersulfido‐(nacnac)nickel(II) complex (nacnac=β‐diketiminato) with [Pt(Ph3P)2(η2‐C2H4)] as a platinum(0) source and isolated in 82 % yield. Strikingly, the results of DFT calculations in accordance with spectroscopic (EPR, paramagnetic NMR) and structural features of the complex revealed that the bonding situation of the S2ligand is between the elusive “half‐bonded” S2radical trianion (${{\rm S}{{{{\bullet}}3- \hfill \atop 2\hfill}}}$) and two separated S2−ligands. Accordingly, the NiIIcenter is partially oxidized, whereas the PtIIsite is redox innocent. The complex can be reversibly oxidized to the corresponding Ni,Pt‐disulfido monocation, compound3, with a SS single bond, and reacts readily with O2to form the corresponding superoxonickel(II) and disulfidoplatinum(II) (4) complexes. These compounds have been isolated in crystalline form and fully characterized, including IR and multi‐nuclear NMR spectroscopy as well as ESI mass spectrometry. The molecular structures of compounds2–4have been confirmed by single‐crystal X‐ray crystallography.
ChemInform Abstract: B+13: A Photodriven Molecular Wankel Engine.
Authors: Zhang Jin , Sergeeva Alina P. , Sparta Manuel , Alexandrova Anastassia N. 
Published: December 2012

AbstractBased on DFT and Born—Oppenheimer molecular dynamics calculations a model molecular Wankel motor, the dual‐ring structure B13+, driven by circularly polarized IR radiation near 3 THz is proposed as a potential building block for nanomachines.
ChemInform Abstract: Electronic Structure of Layered Ferroelectric High‐k Titanate Pr2Ti2O7.
Authors: Atuchin V. V. , Gavrilova T. A. , Grivel J.‐C. , Kesler V. G. , Troitskaia I. B. 
Published: December 2012

AbstractThe title compound is prepared by solid state reaction of a stoichiometric mixture of Pr6O11 and TiO2 (1100 °C, 300 h) and characterized by XRD and SEM.
ChemInform Abstract: Small Non‐Polar Complexes Exhibiting Significant Piezoelectric Properties: Solvothermal Synthesis and Crystal Structures of MO5V(tren)·H2O (M: Mo and W; tren = Tris(2‐aminoethyl)amine).
Authors: Rasmussen M. , Naether C. , Bismayer U. , Bensch W. 
Published: December 2012

AbstractThe isostructural compounds (III) and (V) crystallize in the orthorhombic space group P212121 with Z = 4 (single crystal XRD).
ChemInform Abstract: Crystal Growth and Characterization of New‐Type Lead Tungstate Single Crystal.
Authors: Wang Hong , Chen Hao‐Hong , Borrmann Horst , Zhang Zhi‐Jun , Zhao Jing‐Tai 
Published: December 2012

AbstractYellow Pb3WO6 crystals are hydrothermally prepared from PbO and WO3 using aqueous NaOH solution as a mineralizer (autoclave, 300 °C, 600—800 bar).
ChemInform Abstract: [Ru2Bi14Br4](AlCl4)4 by Mobilization and Reorganization of Complex Clusters in Ionic Liquids.
Authors: Groh Matthias F. , Isaeva Anna , Ruck Michael 
Published: December 2012

AbstractTwo polymorphs of the new title compound are synthesized from Bi24Ru3Br20 in the ionic liquid [bmim]Cl/AlCl3 (140 °C, 96 h).
ChemInform Abstract: Asymmetric Transfer Hydrogenation of Ketimines Using Well‐Defined Iron(II)‐Based Precatalysts Containing a PNNP Ligand.
Authors: Mikhailine Alexandre A. , Maishan Mazharul I. , Morris Robert H. 
Published: December 2012

AbstractN‐Phosphinoylketimines are reduced by iPrOH to the corresponding amines with 95—99% enantioselectivity at low catalyst loading of iron(II)‐complex FER.
ChemInform Abstract: Catalytic Dynamic Kinetic Resolutions with N‐Heterocyclic Carbenes: Asymmetric Synthesis of Highly Substituted β‐Lactones.
Authors: Cohen Daniel T. , Eichman Chad C. , Phillips Eric M. , Zarefsky Emily R. , Scheidt Karl A. 
Published: December 2012

AbstractIn the presence of chiral triazolium catalyst IOX, β‐keto ester enals such as (I) and (IX) undergo the title reaction to give highly enantioenriched β‐lactones or cyclopentenes, correspondingly, depending on the aryl moiety.
ChemInform Abstract: General Entry to Asymmetric One‐Pot [N + 2 + n] Cyclization for the Synthesis of Three‐ to Seven‐Membered Azacycloalkanes.
Authors: Harada Shingo , Sakai Takeo , Takasu Kiyosei , Yamada Ken‐ichi , Yamamoto Yasutomo , Tomioka Kiyoshi 
Published: December 2012

AbstractAddition of the amines (II) to vinylic esters followed by reaction with dihaloalkanes or ethylene sulfate and desilylation allows a diastereoselective and highly enantioselective method to prepare three‐ to seven‐membered azacycloalkanes.
ChemInform Abstract: Cycloaromatization Protocol for Synthesis of Polysubstituted Phenol Derivatives: Method Development and Mechanistic Studies.
Authors: Spencer William T. III , Frontier Alison J. 
Published: December 2012

AbstractTreatment of dienynyl ethers like (I), (III), (V), (VII), (IX), and (XI) with Triton B results in facile and efficient formation of polysubstituted phenol derivatives.
ChemInform Abstract: Facile Conversion of CF3‐Containing Propargylic Alcohol Derivatives via the Corresponding Allenes.
Authors: Yamazaki Takashi , Watanabe Yohsuke , Yoshida Nao , Kawasaki‐Takasuka Tomoko 
Published: December 2012

AbstractNovel synthetic transformations of the title compounds are successfully carried out by using commercially available and low cost common bases.
ChemInform Abstract: Solvent‐Free Oxidation of Aldehydes to Acids by TBHP Using Environmentally‐Friendly MnO4‐1‐Exchanged Mg‐Al Hydrotalcite Catalyst.
Authors: Choudhary Vasant R. , Dumbre Deepa K. , Narkhede Vijay S. 
Published: December 2012

AbstractA MnO4‐‐exchanged Mg‐Al hydrotalcite catalyst shows high activity in the oxidation of different aromatic and aliphatic aldehydes to their corresponding acids.
ChemInform Abstract: A Novel Preparation Method of Ni—Sn Alloy Catalysts Supported on Aluminum Hydroxide: Application to Chemoselective Hydrogenation of Unsaturated Carbonyl Compounds.
Authors: Rodiansono Rodiansono , Hara Takayoshi , Ichikuni Nobuyuki , Shimazu Shogo 
Published: December 2012

AbstractA novel method is applied to the preparation of Ni‐Sn alloy catalysts which are utilized for chemoselective hydrogenation of unsaturated carbonyl compounds.
ChemInform Abstract: Nickel‐Mediated N‐Arylation with Arylboronic Acids: An Avenue to Chan—Lam Coupling.
Authors: Raghuvanshi Dushyant Singh , Gupta Amit Kumar , Singh Krishna Nand 
Published: December 2012

AbstractNiCl2·6H2O efficiently promotes the condensation of a number of amines and amides with arylboronic acids.
ChemInform Abstract: Direct Synthesis of β‐Alkyl N‐Aryl Aza Baylis—Hillman Adducts via Nitroso‐Ene Reaction.
Authors: Murru Siva , Gallo August A. , Srivastava Radhey S. 
Published: December 2012

AbstractA simple, new, and efficient method to prepare title compounds such as (III) and (V) is reported.
ChemInform Abstract: Silver/ThioClickFerrophos‐Catalyzed Enantioselective Conjugate Addition and Cycloaddition of Glycine Imino Ester with Nitroalkenes.
Authors: Imae Kazumi , Konno Takashi , Ogata Kenichi , Fukuzawa Shin‐ichi 
Published: December 2012

AbstractTreatment of the methyl imino ester (I) with nitrostyrenes in the presence of AgOAc, NEt3, and the chiral ferrocene (FER) results in selective formation of anti‐adducts of type (III).
ChemInform Abstract: Ethylene Glycol: A Powerful Catalyst‐Free Medium for C—C Bond‐Forming Reactions.
Authors: Liu Yun‐Lin , Zeng Xing‐Ping , Zhou Jian 
Published: December 2012

AbstractThe use of ethylene glycol as a neutral catalyst‐free medium allows the effective activation of both electrophilic and nucleophilic reaction partners through hydrogen bonding and Lewis base interactions, respectively.
ChemInform Abstract: A Mild, Efficient, and Selective Deprotection of tert‐Butyldimethylsilyl (TBDMS) Ethers Using Dicationic Ionic Liquid as a Catalyst.
Authors: Jadhav Arvind H. , Kim Hern 
Published: December 2012

AbstractThe method is selective for desilylation even in the presence of other sensitive protection groups.
ChemInform Abstract: Ligand‐Free Solid‐Supported Palladium(0) Nano/Microparticles Promoted C—O, C—S, and C—N Cross‐Coupling Reaction.
Authors: Bandna Bandna , Guha Nitul Ranjan , Shil Arun K. , Sharma Dharminder , Das Pralay 
Published: December 2012

AbstractVarious nitro‐substituted aryl halides, mainly the chloro derivatives, and 1‐bromonaphthalene (XI) can be successfully subjected to the nucleophilic substitution.
ChemInform Abstract: Regioselective Synthesis of (E)‐3‐[2‐(Arylmethylene)‐1‐(arylsulfonyl)hydrazino]‐2‐propenoates via the Reaction of Arylsulfonyl Hydrazones and Alkyl Propiolates in the Presence of Triphenylphosphine.
Authors: Hashemi Seyed Abolghasem 
Published: December 2012

AbstractThe highly functionalized title compounds are formed as exclusive (E)‐isomers.
ChemInform Abstract: Nucleophilic Carbene‐Catalyzed Redox‐Esterification Reaction of α‐Halo‐α,β‐unsaturated Aldehydes.
Authors: Wang Xiang‐Bo , Zhou Xiao‐Lei , Du Guang‐Fen , Liu Zhi‐Yong , Dai Bin 
Published: December 2012

AbstractThe NHC‐catalyzed redox‐esterification of α‐halo‐α,β‐unsaturated aldehydes provides unsaturated esters with high yields and excellent trans selectivity.
ChemInform Abstract: Facile and Mild Displacement of Nitrite Ions in Electron‐Deficient Nitroarenes by Alkyl or Aryl Thiols in the Presence of Magnesium Methoxide as a Solid Base Catalyst.
Authors: Naeimi Hossein , Moradian Mohsen 
Published: December 2012

AbstractThe process is highly efficient in the case of substrates (I) and only one ‐NO2 group is substituted in (If).
ChemInform Abstract: Cross‐Coupling of Diarylboronic Acids and Anhydrides with Arylhalides Catalyzed by a Phosphite/N‐Heterocyclic Carbene Co‐Supported Palladium Catalyst System.
Authors: Chen Xiaofeng , Ke Haihua , Chen Yao , Guan Changwei , Zou Gang 
Published: December 2012

AbstractIt provides a highly efficient approach to a wide range of unsymmetrical biaryls including Sartan biphenyl (VI).
ChemInform Abstract: Regioselective Ring‐Opening of Epoxides with ortho‐Lithioanisoles Catalyzed by BF3·OEt2.
Authors: Ertuerk Erkan , Tezeren Mustafa A. , Atalar Taner , Tilki Tahir 
Published: December 2012

AbstractA one‐pot protocol for the preparation of o‐2‐hydroxyanisoles in high yields and regioselectivities is described.
ChemInform Abstract: Asymmetric Michael Additions of α‐Nitrocyclohexanone to Aryl Nitroalkenes Catalyzed by Natural Amino Acid‐Derived Bifunctional Thioureas.
Authors: Joerres Manuel , Schiffers Ingo , Atodiresei Iuliana , Bolm Carsten 
Published: December 2012

AbstractA series of new thiourea catalysts of type THU (19 examples) is prepared from natural amino acids and applied in the reaction with nitroalkene (IId).
ChemInform Abstract: Copper(II)‐Catalyzed Dehydrogenative Cross‐Coupling Between Two Azoles.
Authors: Qin Xurong , Feng Boya , Dong Jiaxing , Li Xiaoyu , Xue Ying , Lan Jingbo , You Jingsong 
Published: December 2012

AbstractCu(O‐Ac)2 in combination with Ag2CO3/Py efficiently promotes the cross‐coupling between two different azoles to produce a number of unsymmetrical biazoles in good yields.
ChemInform Abstract: Oxidative Coupling of Indoles with Ethyl 2‐(Disubstituted Amino)acetates: An Approach to Achieve Indolylglycine Derivatives.
Authors: Xu Zhanwei , Yu Xiaoqiang , Feng Xiujuan , Bao Ming 
Published: December 2012

AbstractIt provides a new and efficient method to prepare indolylglycine derivatives and related compounds such as (VII).
ChemInform Abstract: Allylic Amination and N‐Arylation‐Based Domino Reactions Providing Rapid Three‐Component Strategies to Fused Pyrroles with Different Substituted Patterns.
Authors: Jiang Bo , Li Ying , Tu Man‐Su , Wang Shu‐Liang , Tu Shu‐Jiang , Li Guigen 
Published: December 2012

AbstractAcOH‐mediated treatment of the enaminones (I) and (V) with arylglyoxal monohydrate and aromatic amines allows a new and efficient access to 7‐aminated dihydroindolones of type (IV) and (VI).
ChemInform Abstract: Highly Enantioselective Organocatalytic Sulfenylation of 3‐Aryloxindoles.
Authors: Han Zhiqiang , Chen Wenchao , Dong Sheng , Yang Caiyun , Liu Hongjun , Pan Yuanhuang , Yan Lin , Jiang Zhiyong 
Published: December 2012

AbstractBoth enantiomers of 3‐benzylthio‐ or 3‐alkylthiolindoles are prepared with equally high enantioselectivities using the pseudoenantiomeric pair of cinchona alkaloids (DHQD)2‐PHAL and (DHQ)2‐PHAL as catalysts and N‐(sulfanyl)succinimides as sulfenylating agents.
ChemInform Abstract: A Facile Synthesis of 1,3‐Thiazole‐4‐sulfonyl Chlorides.
Authors: Demydchuk Bogdan A. , Kondratyuk Kostyantyn M. , Korniyenko Andrey N. , Brovarets Vladimir S. , Vasylyshyn Roman Y. , Tolmachev Andrey , Lukin Oleg 
Published: December 2012

AbstractA simple and straightforward preparation of hitherto unavailable thiazole‐4‐sulfonyl chlorides (VIII) (8 examples), promising building blocks for medicinal chemistry, is described.
ChemInform Abstract: Palladium‐Catalyzed Annulation of Allenes with Indole‐2‐carboxylic Acid Derivatives: Synthesis of Indolo[2,3‐c]pyrane‐1‐ones via Ar—I Reactivity or C—H Functionalization.
Authors: Suresh R. Rama , Swamy K. C. Kumara 
Published: December 2012

AbstractIt provides new routes to indolo[2,3‐c]pyranones.
ChemInform Abstract: Toward the Synthesis of γ‐Pyrone‐Containing Natural Products: Diastereoselective Aldol‐Type Reaction of a γ‐Pyrone.
Authors: Takemura Takuma , Hayakawa Ichiro , Fukasawa Emi , Sengoku Tetsuya , Kigoshi Hideo 
Published: December 2012

AbstractThe diastereoselective aldol‐type reaction and the Mukaiyama aldol‐type reaction of γ‐pyrones are reported.
ChemInform Abstract: Catalytic Asymmetric Addition of Aldehydes to Oxocarbenium Ions: A Dual Catalytic System for the Synthesis of Chromenes.
Authors: Rueping Magnus , Volla Chandra M. R. , Atodiresei Iuliana 
Published: December 2012

AbstractA combined metal‐ and organocatalyzed reaction of chromene acetals with aldehydes is presented affording 2‐(2‐hydroxyethyl)chromenes with excellent enantioselectivities.