bluuebunny/crossref_metadata_2025 huggingface dataset:
Competência estratégica em uma organização do setor metal- mecânico
Authors: Mioranza Gustavo , Ganzer Paula Patrícia , Muraro Renata , Olea Pelayo Munhoz , Dorion Eric
Published: June 2013

O processo de estudo de competências é utilizado em áreas do conhecimento para analisar os resultados das organizações, de modo geral e de qualquer natureza, com vista a perceber e interpretar a realidade. A pesquisa teve por objetivo identificar como a gestão de competências pode contribuir para o desempenho organizacional. Quanto à natureza da pesquisa, classifica-se em qualitativa aplicada, a partir da revisão da literatura baseada em referências teóricas; a estratégia de abordagem utilizada foi o estudo de caso em uma indústria do  setor  metal-mecânico,  classificando  a  pesquisa  como  exploratória  a  partir  de  entrevistas   em profundidade. A coleta de dados aconteceu por meio de entrevistas individuais em profundidade, adotando-se uma abordagem estruturada, com a aplicação de um roteiro básico de questões, desenvolvido        a partir da literatura (JAVIDAN, 1998), aplicado aos colaboradores da empresa pesquisada. A análise dos   dados ocorreu por meio de análise de conteúdo das entrevistas, observando-se a  frequência  de  termos  mais citados pelos entrevistados. A pesquisa assinala a importância das competências em entender e interpretar a vida profissional de cada indivíduo e o local em que esse indivíduo está inserido. Em um comparativo das abordagens de competência, identificou-se a contribuição das experiências passadas, das interações sociais, dos símbolos e significados dos momentos de dificuldade nas alterações ou consolidações das competências e sua gestão. Concluiu-se que haverá interferência no desempenho organizacional, a  partir  de  seus  elementos  cognitivos,  fatores  emocionais,  simbólicos  e  funcionais  e  da  forma  como  os indivíduos interagem e aprendem entre si, da forma como suas competências se encontram configuradas.        As competências envolvem o que cada indivíduo realiza, pois implicam no cumprimento dos seus compromissos   profissionais.
O ensino da estratégia na graduação: resultados de uma experiência
Authors: Machado Maria Magnus , Dias Dirceu Rodrigues , Klann Roberto Carlos
Published: June 2013

O estudo analisa as contribuições de uma metodologia de ensino para aprendizagem da Gestão Estratégica dos alunos em um Curso de Administração de uma Instituição de Ensino Superior. A necessidade de conciliar os estudos e os compromissos profissionais desafia o professor a trazer conteúdos que permitam refletir sobre o conhecimento na prática. Ainda, o ensino da Gestão Estratégica vem ganhando força em muitos estudos da área. Outro desafio, principalmente em instituições particulares, é o acesso dos alunos a materiais científicos como artigos de congressos e revistas. O artigo relata um experimento de uma metodologia de ensino utilizada em uma disciplina de Gestão e Planejamento Estratégico II. A pesquisa foi caracterizada neste estudo como exploratória, qualitativa pela análise do conteúdo. Os resultados do experimento e as principais contribuições foram descritas a partir da entrevista com o professor. Evidenciou-se como conteúdo de maior facilidade e aprendizado o Isomorfismo e a Vantagem Competitiva Sustentável.
Photocatalytic Reduction of CO2 on TiO2 and Other Semiconductors
Authors: Habisreutinger Severin N. , Schmidt‐Mende Lukas , Stolarczyk Jacek K.
Published: June 2013

Rising atmospheric levels of carbon dioxide and the depletion of fossil fuel reserves raise serious concerns about the ensuing effects on the global climate and future energy supply. Utilizing the abundant solar energy to convert CO2 into fuels such as methane or methanol could address both problems simultaneously as well as provide a convenient means of energy storage. In this Review, current approaches for the heterogeneous photocatalytic reduction of CO2 on TiO2 and other metal oxide, oxynitride, sulfide, and phosphide semiconductors are presented. Research in this field is focused primarily on the development of novel nanostructured photocatalytic materials and on the investigation of the mechanism of the process, from light absorption through charge separation and transport to CO2 reduction pathways. The measures used to quantify the efficiency of the process are also discussed in detail.
Characterization and modeling of diglycidyl ether of bisphenol‐a epoxy cured with aliphatic liquid amines
Authors: Guest Nicola T. , Tilbrook David A. , Ogin Stephen L. , Smith Paul A.
Published: June 2013

The characterization by DMA and compressive stress‐strain behavior of an epoxy resin cured with a number of liquid amines is studied in this work along with predictions of the associated properties using Group Interaction Modeling (GIM). A number of different methods are used to assign two of the input parameters for GIM, and the effect on the predictions is investigated. Excellent predictions are made for the glass transition temperature, along with good predictions for the beta transition temperature and modulus for the majority of resins tested. Predictions for the compressive yield stress and strain are less accurate, due to a number of factors, but still show reasonable correlation with the experimental data. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3130–3141, 2013
The effect of partial replacement of carbon black by carbon nanotubes on the properties of natural rubber/butadiene rubber compound
Authors: Poikelispää Minna , Das Amit , Dierkes Wilma , Vuorinen Jyrki
Published: June 2013

The basic objective of this study is to investigate the mechanical properties of tyre tread compounds by gradual replacement of carbon black by multiwalled carbon nanotubes (MWCNTs) in a natural rubber–butadiene rubber‐based system. A rapid change in the mechanical properties is noticed even at very low concentrations of nanotubes though the total concentration of the filler is kept constant at 25 phr (parts per hundred rubber). The correlation of the bound rubber content with MWCNT loading directly supports the conclusion that MWCNTs increase the occluded rubber fraction. Transmission electron microscopy reveals a good dispersion of the MWCNT up to a certain concentration. In the presence of MWCNT, a prominent negative shift of the glass transition temperature of the compound is found. Thermal degradation behavior, aging, and swelling experiments were also carried out to understand the resulting effect of the incorporation of MWCNT in the rubber matrix. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3153–3160, 2013
Dynamic mechanical thermal analysis of biocomposites based on PLA and PHBV—A comparative study to PP counterparts
Authors: Adam Jaszkiewicz , Korneliusz Bledzki Andrzej , Agnieszka Meljon
Published: June 2013

The primary objective of this study was the investigation of thermo‐mechanical behavior of cellulosic fiber reinforced polylactid (PLA) and poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) biopolymers. Both PLA and PHBV were processed with 30 wt % of cellulosic fibers; moreover, to improve the processability and mechanical performance, PHBV was previously blended with 30% by weight poly(butylene adipate‐co‐butylene terephthalate) (PBAT). Secondary target was the comparison of the obtained results to natural fiber reinforced polypropylene (PP) composites reinforced with exact the same fibers and processed by using identical techniques. For validation the thermo‐mechanical properties, a dynamic mechanical thermal analysis (DMTA) was applied. Storage modulus (E′), loss modulus (E″), and loss factor (tan δ) were determined. The DMTA results indicate decreased polymer chain motion with resulting improvement of stiffness expressed by the storage modulus. Finally, the effectiveness of fiber on the moduli was investigated. The C coefficient differs in dependence on fiber type, use of coupling agent, and the reference temperature in glassy state. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 3175–3183, 2013
Phosphatidylinositol‐3,4,5‐trisphosphate: Tool of choice for class I PI 3‐kinases
Authors: Salamon Rachel Schnur , Backer Jonathan M.
Published: June 2013

Class I PI 3‐kinases signal by producing the signaling lipid phosphatidylinositol(3,4,5) trisphosphate, which in turn acts by recruiting downstream effectors that contain specific lipid‐binding domains. The class I PI 3‐kinases comprise four distinct catalytic subunits linked to one of seven different regulatory subunits. All the class I PI 3‐kinases produce the same signaling lipid, PIP3, and the different isoforms have overlapping expression patterns and are coupled to overlapping sets of upstream activators. Nonetheless, studies in cultured cells and in animals have demonstrated that the different isoforms are coupled to distinct ranges of downstream responses. This review focuses on the mechanisms by which the production of a common product, PIP3, can produce isoform‐specific signaling by PI 3‐kinases.

Editor's suggested further reading in BioEssays: Phosphatidylinositol 4,5‐bisphosphate: Targeted production and signaling Abstract

How does SHIP1/2 balance PtdIns(3,4)P2 and does it signal independently of its phosphatase activity? Abstract
Catalytic synthesis and antioxidant activity of sulfated polysaccharide from Momordica charantia L.
Authors: Liu Xin , Chen Tong , Hu Yan , Li Kexin , Yan Liushui
Published: June 2013

Sulfated derivatives of polysaccharide from Momordica charantia L. (MCPS) with different degree of sulfation (DS) were synthesized by chlorosulfonic acid method with ionic liquids as solvent. Fourier transform infrared spectra and 13C nuclear magnetic resonance spectra indicated that C‐6 substitution was predominant in MCPS compared with the C‐2 position. Compared with the native polysaccharide from Momordica charantia L. (MCP), MCPS exhibited more excellent antioxidant activities in vitro, which indicated that sulfated modification could enhance antioxidant activities of MCP. Furthermore, high DS and moderate molecular weight could improve the antioxidant activities of polysaccharide. © 2013 Wiley Periodicals, Inc. Biopolymers 101: 210–215, 2014.
Identification of the absorptive constituents and their metabolites in vivo of Puerariae Lobatae Radix decoction orally administered in WZS‐miniature pigs by HPLC‐ESI‐Q‐TOFMS
Authors: Zhou Qi‐Le , Wang Ying‐Feng , Yang Dong‐Hui , Xu Feng , Zhao Xin , Zhang Lei , Liang Jing , Yang Xiu‐Wei
Published: June 2013

In this study, the technique of high‐performance liquid chromatography coupled with electrospray ionization quadrupole time‐of‐flight mass spectrometry (HPLC‐ESI‐Q‐TOFMS) was used to analyze and identify the absorptive constituents and their metabolites in drug‐containing urine of Wuzhishan (WZS)‐miniature pigs administered with Puerariae Lobatae Radix (PLR) decoction. With the accurate mass measurements (<5 ppm) and effective MS2 fragment ions, 96 compounds, including eight original constituents and 88 metabolites, were identified from the drug‐containing urine. Among these, 64 metabolites were new ones and their structures can be categorized into five types: isoflavones, puerols, O‐desmethylangolensins, equols and isoflavanones. In particular, puerol‐type constituents in PLR were first proved to be absorptive in vivo. Meanwhile, the metabolic pathways of PLR in vivo were investigated. On the basis of relative content of the identified compounds, 13 major metabolites accounting for approximately 50% of the contents, as well as their corresponding 12 prototype compounds, were determined as the major original absorptive constituents and metabolites of PLR in vivo. The HPLC‐ESI‐Q‐TOFMS technique proved to be powerful for characterizing the chemical constituents from the complicated traditional Chinese medicine matrices in this research. Copyright © 2013 John Wiley & Sons, Ltd.
Cellular and molecular mechanisms in the hypoxic tissue: role of HIF‐1 and ROS
Authors: Zepeda Andrea B. , Pessoa Adalberto , Castillo Rodrigo L. , Figueroa Carolina A. , Pulgar Victor M. , Farías Jorge G.
Published: June 2013

Reactive oxygen species such as superoxide anion radicals (O2−) and hydrogen peroxide (H2O2) have for long time been recognized as undesirable by‐products of the oxidative mitochondrial generation of adenosine triphosphate (ATP). Recently, these highly reactive species have been associated to important signaling pathways in diverse physiological conditions such as those activated in hypoxic microenvironments. The molecular response to hypoxia requires fast‐acting mechanisms acting within a wide range of partial pressures of oxygen (O2). Intracellular O2 sensing is an evolutionary preserved feature, and the best characterized molecular responses to hypoxia are mediated through transcriptional activation. The transcription factor, hypoxia‐inducible factor 1 (HIF‐1), is a critical mediator of these adaptive responses, and its activation by hypoxia involves O2‐dependent posttranslational modifications and nuclear translocation. Through the induction of the expression of its target genes, HIF‐1 coordinately regulates tissue O2 supply and energetic metabolism. Other transcription factors such as nuclear factor κB are also redox sensitive and are activated in pro‐oxidant and hypoxic conditions. The purpose of this review is to summarize new developments in HIF‐mediated O2 sensing mechanisms and their interactions with reactive oxygen species–generating pathways in normal and abnormal physiology. Copyright © 2013 John Wiley & Sons, Ltd.
Emergency cardiac surgery during transfemoral and transapical transcatheter aortic valve implantation: Incidence, reasons, management, and outcome of 411 patients from a single center
Authors: Griese Daniel P. , Reents Wilko , Kerber Sebastian , Diegeler Anno , Babin‐Ebell Jörg
Published: June 2013

Objectives and Background

Transcatheter aortic valve implantation (TAVI) is increasingly performed in high‐risk patients with severe aortic valve stenosis. Incidence and impact of emergency cardiac surgery (ECS) during TAVI is unclear.

Methods and Results

Two‐hundred twenty one transapical (TA) and 190 transfemoral (TF) TAVIs were performed at our hospital between 01/2009 and 12/2012. Twenty patients (4.9%) required ECS, more frequently in the TF‐ (n = 11; 5.8%) than in the TA‐group (n = 9; 4.1%; P = 0.017). ECS‐cases were evenly distributed throughout the 4 years. Baseline characteristics of the ECS‐patients were not different from the non‐ECS‐patients. Reasons were acute cardiac failure, coronary obstruction, annular rupture, valve migration, right‐ and left‐ventricular perforation, severe paravalvular leakage, aortic dissection, and mitral valve damage. Surgical intervention consisted of peripheral CPB, switch to TA, thoracotomy and suture of perforated cardiac chambers and conventional aortic valve replacement with concomitant repair of associated cardiovascular injury. Thirty‐day mortality was 35.0%, and 55.0% could be salvaged to hospital discharge. Kaplan–Meier 1‐year survival curves were significantly impaired for patients requiring ECS (TF: P < 0.0001, HR 8.716; TA: P = 0.013, HR 2.813).

Conclusions

Life‐threatening complications requiring bail‐out ECS occur in a substantial proportion during TAVI. ECS dramatically affects early and late outcome after TAVI. Under optimal conditions more than half of the ECS‐patients can be salvaged. With the current technology of THV‐systems ECS should be an integral part of the logistic conditions surrounding TAVI and is far from being futile in this patient population. © 2013 Wiley Periodicals, Inc.
Transcatheter brachial fistula creation for treatment of pulmonary arteriovenous malformations
Authors: Esch Jesse J. , Marshall Audrey C. , Porras Diego
Published: June 2013

Pulmonary arteriovenous malformations (PAVMs) are thought to form as a result of exclusion of hepatic venous blood from part of the pulmonary circulation. Surgical arteriovenous (AV) fistula creation has demonstrated therapeutic potential to reverse PAVM formation. We sought to demonstrate the feasibility and safety of transcatheter AV fistula creation for this indication. Fluoroscopically guided puncture from the basilic vein into the brachial artery using a Brockenbrough needle and sharpened 0.014” wire created a tract between these vessels. After balloon dilation of the tract, a covered stent was deployed, resulting in a functioning brachial AV fistula. The procedure was technically successful, with no clinical complications at 4 months follow‐up. Repeat diagnostic catheterization revealed marked improvement in systemic saturation and near‐resolution of PAVMs in the pilot patient. This report suggests that transcatheter brachial arteriovenous fistula formation is technically feasible, and may be effective in managing PAVMs in select single‐ventricle patients. © 2013 Wiley Periodicals, Inc.
An evidence‐based review of the impact of periprocedural myocardial infarction in carotid revascularization
Authors: Stilp Erik , Baird Colleen , Gray William A. , Schneider Peter A. , Simonton Charles A. , Verta Patrick , Mena‐Hurtado Carlos I.
Published: June 2013

Landmark trials comparing carotid endarterectomy (CEA) with medical therapy in patients with symptomatic or asymptomatic atherosclerotic stenosis of extracranial carotid arteries have favored carotid revascularization. Carotid artery stenting (CAS) has emerged as a minimally invasive option for revascularization of carotid artery stenoses and has been shown to be noninferior to CEA, regardless of patient symptom status. Debate continues regarding the importance of periprocedural myocardial infarction (PMI) as an endpoint in carotid revascularization trials. Recent randomized comparisons of CEA and CAS pre‐specify PMI as an endpoint. Understanding PMI in CEA and CAS, the need for routine biomarker assessment surrounding both revascularization strategies, the effect of PMI on long‐term morbidity and mortality, and the groups most at risk for PMI are of critical importance when choosing a carotid revascularization strategy for symptomatic and asymptomatic patients, since decreasing the incidence of PMI will make revascularization safer. This review examines available data regarding the relevance of PMI in vascular and carotid‐specific outcomes. © 2013 Wiley Periodicals, Inc.
Patent foramen ovale closure with the gore septal occluder
Authors: Thomson John D. , Hildick‐Smith David , Clift Paul , Morgan Gareth , Daniels Matthew , Henderson Robert , Spence Mark S. , Mahadevan Vaikom S. , Crossland David , Ormerod Oliver
Published: June 2013

Objectives

To report procedural outcome and short‐term follow‐up data for the Gore septal occluder (GSO), a new device for closure of patent foramen ovale (PFO).

Background

Transcatheter closure of PFO is an established treatment modality but no current device provides a perfect solution. The GSO has a number of design features, which make it potentially attractive for closure of defects in the atrial septum.

Methods

Data from 9 centers in the United Kingdom implanting the GSO device, submitted to an electronic registry for evaluation.

Results

Two hundred twenty‐nine patients undergoing PFO closure from June 2011 to October 2012 were included. Indications for closure were secondary prevention of paradoxical cerebral emboli (83.4%), migraine (2.1%), platypnoea orthodeoxia (3.9%), and other (10.5%). Median PFO size was 8 mm and 34 and 39%, respectively, had long tunnel anatomy or atrial septal aneurysms. A GSO was successfully implanted in all cases. A single device was used in 98% but in 4 patients the initial device was removed and a second device required. Procedural complications occurred in 3% and later complications (e.g., atrial fibrillation, atrial ectopics, and device thrombus) in 5.7% of cases. All patients have undergone clinical and echocardiographic follow‐up and all devices remain in position. Early bubble studies (median 0 months) with Valsalva maneuver in 67.2% were negative in 89%.

Conclusions

The GSO is an effective occlusion device for closure of PFO of all types. Longer‐term follow‐up particularly to document later closure rates are required. © 2013 Wiley Periodicals, Inc.
Microemulsion‐Assisted Preparation of a Mesoporous Ferrihydrite/SiO2 Composite for the Efficient Removal of Formaldehyde from Air
Authors: Xu Zhihua , Yu Jiaguo , Xiao Wei
Published: June 2013

Mesoporous ferrihydrite/SiO2 composites were synthesized according to a water‐in‐oil microemulsion method and characterized by X‐ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, thermogravimetry, nitrogen‐adsorption/desorption, and by X‐ray photoelectron spectroscopy. The as‐prepared porous ferrihydrite/SiO2 composites showed an excellent adsorption performance for formaldehyde (HCHO) removal from indoor air at ambient temperature. It was found that the aging time during the synthesis had a significant impact on the pore structure, surface area, and HCHO adsorption of these materials. The ferrihydrite/SiO2 composite that was aged for 3 h in the presence of tetraethyl orthosilicate (TEOS) exhibited a relatively high HCHO adsorption capacity, as well as good recyclability, which was attributed to a relatively large BET surface area, optimal pore size, a suitable Si/Fe atomic ratio, and a synergistic effect between ferrihydrite and SiO2. This work not only demonstrates that porous ferrihydrite/SiO2 composites can act as an efficient adsorbent toward HCHO, but suggests a new route for the rational design of cost‐effective and environmentally benign adsorbents with high performance for indoor air purification.
Formation of a Thymine‐HgII‐Thymine Metal‐Mediated DNA Base Pair: Proposal and Theoretical Calculation of the Reaction Pathway
Authors: Šebera Jakub , Burda Jaroslav , Straka Michal , Ono Akira , Kojima Chojiro , Tanaka Yoshiyuki , Sychrovský Vladimír
Published: June 2013

A reaction mechanism that describes the substitution of two imino protons in a thymine:thymine (T:T) mismatched DNA base pair with a HgII ion, which results in the formation of a (T)N3‐HgII‐N3(T) metal‐mediated base pair was proposed and calculated. The mechanism assumes two key steps: The formation of the first HgIIN3(T) bond is triggered by deprotonation of the imino N3 atom in thymine with a hydroxo ligand on the HgII ion. The formation of the second HgIIN3(T) bond proceeds through water‐assisted tautomerization of the remaining, metal‐nonbonded thymine base or through thymine deprotonation with a hydroxo ligand of the HgII ion already coordinated to the thymine base. The thermodynamic parameters ΔGR=−9.5 kcal mol−1, ΔHR=−4.7 kcal mol−1, and ΔSR=16.0 cal mol−1 K−1 calculated with the ONIOM (B3LYP:BP86) method for the reaction agreed well with the isothermal titration calorimetric (ITC) measurements by Torigoe et al. [H. Torigoe, A. Ono, T. Kozasa, Chem. Eur. J. 2010, 16, 13218–13225]. The peculiar positive reaction entropy measured previously was due to both dehydration of the metal and the change in chemical bonding. The mercury reactant in the theoretical model contained one hydroxo ligand in accord with the experimental pKa value of 3.6 known for an aqua ligand of a HgII center. The chemical modification of T:T mismatched to the T‐HgII‐T metal‐mediated base pair was modeled for the middle base pair within a trinucleotide B‐DNA duplex, which ensured complete dehydration of the HgII ion during the reaction.
Modulating the Optoelectronic Properties of Large, Conjugated, High‐Energy Gap, Quaternary Phosphine Oxide Hosts: Impact of the Triplet‐Excited‐State Location
Authors: Zhang Zhen , Zhang Zhensong , Chen Runfeng , Jia Jilin , Han Chunmiao , Zheng Chao , Xu Hui , Yu Donghui , Zhao Yi , Yan Pengfei , Liu Shiyong , Huang Wei
Published: June 2013

The purposeful modulation of the optoelectronic properties was realised on the basis of a series of the large, conjugated, phosphine oxide hosts 9,9‐bis‐{4′‐[2‐(diphenylphosphinoyl)phenoxy]biphenyl‐4‐yl}‐9H‐fluorene (DDPESPOF), 9,9‐bis‐{3′‐(diphenylphosphinoyl)‐4′‐[2‐(diphenylphosphinoyl)phenoxy]biphenyl‐4‐yl}‐9H‐fluorene (DDPEPOF), 9‐[4′‐(9‐{4′‐[2‐(diphenylphosphoryl)phenoxy]biphenyl‐4‐yl}‐9H‐fluoren‐9‐yl)biphenyl‐4‐yl]‐9H‐carbazole (DPESPOFPhCz) and 9‐[4′‐(9‐{3′‐(diphenylphosphoryl)‐4′‐[2‐(diphenylphosphoryl)phenoxy]biphenyl‐4‐yl}‐9H‐fluoren‐9‐yl)biphenyl‐4‐yl]‐9H‐carbazole (DPEPOFPhCz). The last two are quaternary with fluorenyls as linking bridges, diphenylphosphine oxide (DPPO) moieties as electron acceptors and diphenylethers and carbazolyls as two different kinds of electron donors. Owing to the fine‐organised molecular structures and the mixed indirect and multi‐insulating linkages, all of these hosts achieve the same first triplet energy levels (T1) of 2.86 eV for exothermic energy transfer to phosphorescent dopants. The first singlet energy levels (S1) and the carrier injection/transportation ability of the hosts were accurately modulated, so that DPESPOFPhCz and DPEPOFPhCz revealed extremely similar optoelectronic properties. However, the T1 state of the former is localised on fluorenyl, whereas the carbazolyl mainly contributes to the T1 state of the latter. A lower driving voltages and much higher efficiencies of the devices based on DPESPOFPhCz indicated that the chromophore‐localised T1 state can suppress the quenching effects through realising independent contributions from the different functional groups to the optoelectronic properties and the embedding and protecting effect on the T1 states by peripheral carrier transporting groups.
Heterohelicenes with Embedded P‐Chiral 1H‐Phosphindole or Dibenzophosphole Units: Diastereoselective Photochemical Synthesis and Structural Characterization
Authors: Yavari Keihann , Retailleau Pascal , Voituriez Arnaud , Marinetti Angela
Published: June 2013

The oxidative photocyclization reactions of olefins that contain 1H‐phosphindole or dibenzophosphole substituents have been applied to the synthesis of P/N‐bi‐heterosubstituted dimeric helicenes, as well as of new [6]‐ and [8]phosphahelicenes. In these photocyclization processes, the configuration of the stereogenic phosphorus center dictates the sense of helical chirality. Thus, by starting from enantiomerically pure P‐menthylphosphole‐oxide units, this method affords enantiopure helical compounds. The helical phosphine oxides were characterized by X‐ray diffraction. After reduction of the phosphine‐oxides, the corresponding helical phosphines have been used as ligands in transition‐metal complexes. The X‐ray crystal structure of a gold chloride complex of a [6]helicene is reported.
High‐Performance Förster Resonance Energy Transfer (FRET)‐Based Dye‐Sensitized Solar Cells: Rational Design of Quantum Dots for Wide Solar‐Spectrum Utilization
Authors: Lee Eunwoo , Kim Chanhoi , Jang Jyongsik
Published: June 2013

High‐performance Förster resonance energy transfer (FRET)‐based dye‐sensitized solar cells (DSSCs) have been successfully fabricated through the optimized design of a CdSe/CdS quantum‐dot (QD) donor and a dye acceptor. This simple approach enables quantum dots and dyes to simultaneously utilize the wide solar spectrum, thereby resulting in high conversion efficiency over a wide wavelength range. In addition, major parameters that affect the FRET interaction between donor and acceptor have been investigated including the fluorescent emission spectrum of QD, and the content of deposited QDs into the TiO2 matrix. By judicious control of these parameters, the FRET interaction can be readily optimized for high photovoltaic performance. In addition, the as‐synthesized water‐soluble quantum dots were highly dispersed in a nanoporous TiO2 matrix, thereby resulting in excellent contact between donors and acceptors. Importantly, high‐performance FRET‐based DSSCs can be prepared without any infrared (IR) dye synthetic procedures. This novel strategy offers great potential for applications of dye‐sensitized solar cells.
Single‐Step Microwave‐Mediated Synthesis of Oxazoles and Thiazoles from 3‐Oxetanone: A Synthetic and Computational Study
Authors: Orr David , Tolfrey Alexandra , Percy Jonathan M. , Frieman Joanna , Harrison Zoë A. , Campbell‐Crawford Matthew , Patel Vipulkumar K.
Published: June 2013

The direct microwave‐mediated condensation between 3‐oxetanone and primary amides and thioamides has delivered moderate to good yields of (hydroxymethyl)oxazoles and (hydroxymethyl)thiazoles. The reactions use a sustainable solvent and only require short reaction times. These are highly competitive methods for the construction of two classes of valuable heteroarenes, which bear a useful locus for further elaboration. Electronic structure calculations have shown that the order of events involves chalcogen atom attack at sp3 carbon and alkyl–oxygen cleavage. The critical role of acid catalysis was shown clearly, and the importance of acid strength was demonstrated. The calculated barriers were also fully consistent with the observed order of thioamide and amide reactivity. Spontaneous ring opening involves a modest degree of CO cleavage, moderating the extent of strain relief. On the acid‐catalysed pathway, CO cleavage is less extensive still, but proton transfer to the nucleofuge is well advanced with the carboxylic acid catalysts, and essentially complete with methanesulfonic acid.
Enantioselective Aza‐Michael Addition of Imides by Using an Integrated Strategy Involving the Synthesis of a Family of Multifunctional Catalysts, Usage of Multiple Catalysis, and Rational Design of Experiment
Authors: Silvi Mattia , Renzi Polyssena , Rosato Deborah , Margarita Cristiana , Vecchioni Alessio , Bordacchini Ivan , Morra Diego , Nicolosi Alessandro , Cari Riccardo , Sciubba Fabio , Scarpino Schietroma Daniele M. , Bella Marco
Published: June 2013

A challenging asymmetric reaction (aza‐Michael addition of imides to enones) has been optimized through an integrated approach involving the synthesis of a family of organocatalysts, multiple catalysis (usage of additives), and finally with rational exploration of the chemical space by the application of the experiment design.
ChemInform Abstract: Valence Changes of Manganese and Structural Phase Transitions in Sr1‐xPrxMnO3 (0.1 ≤ x ≤ 0.6).
Authors: Tan Teck‐Yee , Martin Nicolas , Zhou Qingdi , Kennedy Brendan J. , Gu Qinfen , Kimpton Justin A. , Zhang Zhaoming , Jang Ling‐Yun
Published: June 2013

Fifteen perovskite manganites Sr1‐xPrxMnO3 with x = 0.1—0.6 in steps of 0.025 are prepared by solid state methods and their crystal structures are determined by synchrotron powder XRD.
ChemInform Abstract: Redetermination of the Structure of ALa2WO7 (A: Ba, Sr) with Fluorite‐Like Metal Ordering.
Authors: Fu W. T. , Ijdo D. J. W. , Bontenbal A.
Published: June 2013

The crystal structures of the title compounds at room temperature are redetermined by powder X‐ray and neutron diffraction.
ChemInform Abstract: Varying the Alkali‐Metal Radii in (KxRb1‐x)n[GaH2]n (0 ≤ x ≤ 1) Reorients a Stable Polyethylene‐Structured [GaH2]nn‐ Anionic Chain.
Authors: Fahlquist Henrik , Noreus Dag , Soerby Magnus H.
Published: June 2013

The title compounds are characterized by neutron and X‐ray diffraction, and IR spectroscopy.
ChemInform Abstract: Sr7Co4(CO3)O13‐δ (δ = 1.64), an Original Cobaltite Derivative of the Ruddlesden—Popper Series.
Authors: Demont A. , Pelloquin D. , Hebert S. , Hervieu M. , Hoewing J. , Maignan A.
Published: June 2013

Sr7Co4(CO3)O11.36 is obtained by solid state reaction of SrO, SrCO3, and Co3O4 in the molar ratio 6:1:4/3 (alumina crucible in evacuated quartz tubes, 1123 K, 24 h).
ChemInform Abstract: Structure, Phase Transition Behaviors and Electrical Properties of Nd Substituted Aurivillius Polycrystallines Na0.5NdxBi2.5‐xNb2O9 (x = 0.1, 0.2, 0.3, and 0.5).
Authors: Long Changbai , Fan Huiqing , Ren Pengrong
Published: June 2013

New high‐temperature Aurivillius piezoelectrics Na0.5NdxBi2.5‐xNb2O9 (NDBNx, x = 0.1, 0.2, 0.3, and 0.5) are prepared by solid state reaction of a stoichiometric mixture of Bi2O3, Nb2O5, Na2CO3, and Nd2O3 (1.
ChemInform Abstract: Structure and Unusual Magnetic Properties of YbMn0.17Si1.88.
Authors: Peter Sebastian C. , Malliakas Christos D. , Kanatzidis Mercouri G.
Published: June 2013

YbMn0.17Si1.88 (I) is obtained by melting of the elements in an indium flux (alumina crucible in evacuated fused silica tube, Yb:Mn:Si = 3:2:6, 1000 °C, 5 h; product isolation by centrifugation at 350 °C and flux removal by sonication in AcOH).
ChemInform Abstract: Boric Acid Flux Synthesis, Structure and Magnetic Property of MB12O14(OH)10 (M: Mn, Fe, Zn).
Authors: Yang Dingfeng , Cong Rihong , Gao Wenliang , Yang Tao
Published: June 2013

Single crystals of the new title borates are prepared hydrothermally from aqueous solutions of M(NO3)2 (M: Mn, Fe, Zn) and oxalic acid (autoclave, 150 °C, 2 d) followed by mixing the resultant solid with H3BO3 (autoclave, 220 °C, 3 d).
ChemInform Abstract: Hydrothermal Synthesis, Crystal Structures and Characterization of New Vanadoborates: The Novel Decorated Cage Cluster [V6B22O44(OH)10].
Authors: Liu Xing , Zhou Jian , An Litao , Chen Rong , Hu Feilong , Tang Qiuling
Published: June 2013

The crystal structures of the new compounds (III), (IV), and (V) are determined by single crystal XRD.
ChemInform Abstract: Rapid Hydrothermal Synthesis of VO2 (B) and Its Conversion to Thermochromic VO2 (M1).
Authors: Popuri Srinivasa Rao , Miclau Marinela , Artemenko Alla , Labrugere Christine , Villesuzanne Antoine , Pollet Michael
Published: June 2013

The monoclinic layered (B) polymorph of VO2, a promising cathode material for aqueous lithium ion batteries, is hydrothermally synthesized from aqueous mixtures of V2O5 and citric acid (autoclave, 180 °C for 2 h or 220 °C for 1 h).
ChemInform Abstract: Cr(VI) Trioxide as a Starting Material for the Synthesis of Novel Zero‐, One‐, and Two‐Dimensional Uranyl Dichromates and Chromate‐Dichromates.
Authors: Siidra Oleg I. , Nazarchuk Evgeny V. , Suknotova Anna N. , Kayukov Roman A. , Krivovichev Sergey V.
Published: June 2013

In addition to the uranyl dichromates (IV) and (V), the uranyl chromate/dichromate compounds Rb2(UO2)(CrO4)(Cr2O7) (VI), (Me2NH2)2(UO2)(CrO4) (Cr2O7) (VII), (Me2NH2)2(UO2) (CrO4)2(Cr2O7) (H2O)2 (VIII), and (iPrNH3)2(UO2) (CrO4)2(Cr2O7) (H2O)2 (IX) are prepared by slow evaporation of aqueous solutions of CrO3, (UO2)(NO3)2, and RbNO3 or the respective amine.
ChemInform Abstract: Crystal Growth and First Crystallographic Characterization of Mixed Uranium(IV)—Plutonium(III) Oxalates.
Authors: Tamain Christelle , Chapelet Benedicte Arab , Rivenet Murielle , Abraham Francis , Caraballo Richard , Grandjean Stephane
Published: June 2013

The mixed‐actinide UIV‐PuIII oxalates (NH4)0.5 [Pu0.5U0.5 (C2O4)2·H2O] ·nH2O (I) and (NH4)2.7Pu0.7U1.3 (C2O4)5·nH2O (II) are prepared by diffusion of Pu3+ and U4+ through glass fiber membranes separating three compartments of a glass cell containing 1.
ChemInform Abstract: High‐Pressure Crystal Growth and Electromagnetic Properties of 5d Double‐Perovskite Ca3OsO6.
Authors: Feng Hai Luke , et al. et al.
Published: June 2013

Single crystals of the title compound are prepared by solid state reaction of CaO, Os, and CaCl2 (Pt capsule, 6 GPa, 1400 °C, 1 h).
ChemInform Abstract: A New Method Using 2‐Chloro‐4,6‐dimethoxy‐1,3,5‐triazine for Facile Elimination of Dimethylamino Group in Eschenmoser′s Methylenation for Synthesis of α,β‐Unsaturated Esters.
Authors: Yamada Kohei , Masaki Kazumasa , Hagimoto Yuri , Kamiya Seina , Kunishima Munetaka
Published: June 2013

The method allows the chemoselective elimination in substrates possessing either a diethylamino‐ or an alkylsulfanyl group.
ChemInform Abstract: Titanocene‐Promoted Stereoselective Eliminations on Epoxy Alcohols Derived from R‐(—)‐Carvone.
Authors: Fernandez‐Mateos A. , Herrero Teijon P. , Rubio Gonzalez R.
Published: June 2013

The reaction of (protected) epoxy alcohols, promoted by Ti(III), evolves in two ways through the radical arising from oxirane cleavage: dehydroxylation and dehydrogenation.
ChemInform Abstract: Cyclometalated Iridium Complexes for Transfer Hydrogenation of Carbonyl Groups in Water.
Authors: Wei Yawen , Xue Dong , Lei Qian , Wang Chao , Xiao Jianliang
Published: June 2013

A new protocol for the reduction of ketones and aldehydes in acidic aqueous conditions using formic acid as the hydrogen source and cyclometalated iridium complexes as catalysts is described.
ChemInform Abstract: Selective Reduction of Condensed N‐Heterocycles Using Water as a Solvent and a Hydrogen Source.
Authors: Cho Hyejin , Toeroek Fanni , Toeroek Bela
Published: June 2013

The reduction of unprotected indoles (I) and quinolines (III) in the presence of a Raney‐type Ni‐Al alloy is described.
ChemInform Abstract: Pd(diimine)Cl2 Embedded Heterometallic Compounds with Porous Structures as Efficient Heterogeneous Catalysts.
Authors: Huang Sheng‐Li , Jia Ai‐Quan , Jin Guo‐Xin
Published: June 2013

Four metal‐organic framework catalysts constructed from Pd(bipyridine dicarboxylate) units and Sm, Eu, Gd or Tb are investigated as catalysts in Heck and Suzuki—Miyaura coupling reactions.
ChemInform Abstract: pH‐Responsive N‐Heterocyclic Carbene Copper(I) Complexes: Syntheses and Recoverable Applications in the Carboxylation of Arylboronic Esters and Benzoxazole with Carbon Dioxide.
Authors: Wang Wenlong , Zhang Guodong , Lang Rui , Xia Chungu , Li Fuwei
Published: June 2013

N‐Heterocyclic carbene Cu and Ag complexes are shown to catalyze the carboxylation of organoboric esters, benzoxazole, and terminal alkynes.
ChemInform Abstract: In situ Generated Ph3P(OAc)2 as a Novel Reagent for the Efficient Acetylation of Alcohols and Thiols at Room Temperature.
Authors: Iranpoor Nasser , Firouzabadi Habib , Davan Elham Etemadi
Published: June 2013

The title reagent is generated in situ in the presence of NBS or Br2.
ChemInform Abstract: Monophasic Catalytic System for the Selective Semireduction of Alkynes.
Authors: Whittaker Aaron M. , Lalic Gojko
Published: June 2013

A highly efficient catalytic semireduction of alkynes is developed.
ChemInform Abstract: Highly Efficient and Chemoselective α‐Iodination of Acrylate Esters Through Morita—Baylis—Hillman‐Type Chemistry.
Authors: Pace Vittorio , Vilkauskaite Gyte , Sackus Algirdas , Holzer Wolfgang
Published: June 2013

The reaction works also well with multifunctionalized acrylate esters, providing excellent chemoselectivity.
ChemInform Abstract: Highly Enantioselective Synthesis of Cyclopropylamine Drivatives via Ru(II)‐Pheox‐Catalyzed Direct Asymmetric Cyclopropanation of Vinylcarbamates.
Authors: Chanthamath Soda , Nguyen Dao Thi , Shibatomi Kazutaka , Iwasa Seiji
Published: June 2013

This is the first report of the successful enantioselective carbene transfer cyclopropanation of diazoester into vinylcarbamate.
ChemInform Abstract: Studies on the Ring‐Opening of Bicyclic Cyclopropanes Activated by a Carbonyl Group.
Authors: Jiang Xiaojian , Lim Zonghan , Yeung Ying‐Yeung
Published: June 2013

Substrates (I) are investigated in the presence of nucleophiles (II) and (IV) under 2 different activation methods.
ChemInform Abstract: Effect of Ester on Rhodium‐Catalyzed Intermolecular [5 + 2] Cycloaddition of 3‐Acyloxy‐1,4‐enynes and Alkynes.
Authors: Schienebeck Casi M. , Robichaux Patrick J. , Li Xiaoxun , Chen Lianqing , Tang Weiping
Published: June 2013

Significant rate acceleration is observed for the title reaction when acyloxy‐1,4‐enynes (I) bearing a p‐dimethylaminobenzoate are employed as the 5‐carbon building block.
ChemInform Abstract: Catalytic Applications of a Versatile Magnetically Separable Fe—Mo (Nanocat‐Fe—Mo) Nanocatalyst.
Authors: Gawande Manoj B. , Branco Paula S. , Nogueira Isabel D. , Ghumman C. Amjad A. , Bundaleski Nenad , Santos Aderito , Teodoro Orlando M. N. D. , Luque Rafael
Published: June 2013

A Fe‐Mo nanocatalyst is shown to be an active and highly selective catalyst for a range of reactions such as oxidations, transfer hydrogenations, hydrations and three‐component reactions.
ChemInform Abstract: Iridium‐Catalyzed Enantioselective Allylic Vinylation.
Authors: Hamilton James Y. , Sarlah David , Carreira Erick M.
Published: June 2013

Application of this new method is demonstrated by total syntheses of (‐)‐nyasol (XIVb) and (‐)‐hinokiresinol (XVIb).
ChemInform Abstract: (Z)‐Selective Dimerization of Aromatic Terminal Alkynes Catalyzed by an Iridium(I)—N‐Heterocyclic Carbene—Phosphine System.
Authors: Forsyth Calum D. , Kerr William J. , Paterson Laura C.
Published: June 2013

The optimized conditions render possible the preparation of (Z)‐enynes whose yield and selectivity depend on the substituents of the arene moiety.
ChemInform Abstract: Highly Enantioselective Intermolecular Hydroamination of Allylic Amines with Chiral Aldehydes as Tethering Catalysts.
Authors: MacDonald Melissa J. , Hesp Colin R. , Schipper Derek J. , Pesant Marc , Beauchemin Andre M.
Published: June 2013

Both enantiomers of the products can be obtained using aldehydes (I) or (II) as catalysts.
ChemInform Abstract: A New Approach to the Synthesis of (Z)‐2‐Fluoro‐2‐alkenals via Wittig‐Type Carbonyl Condensation Reactions of 2‐(Fluoromethyl)‐4,4,6‐trimethyl‐1,3‐oxazine Phosphonium Bromide.
Authors: Kajjout Mohammed , Smietana Michael , Leroy Jacques , Rolando Christian
Published: June 2013

Condensation of phosphonium bromide (I) with aldehydes gives (E/Z)‐mixtures of alkenes.
ChemInform Abstract: Synthesis of o‐(Dimethylamino)aryl Ketones, Acridones, Acridinium Salts, and 1H‐Indazoles by the Reaction of Hydrazones and Arynes.
Authors: Dubrovskiy Anton V. , Larock Richard C.
Published: June 2013

The formation of (dimethylamino)aryl ketones proceeds via a benzyne‐induced cyclization towards an intermediary dihydroindazole followed by ring‐opening and hydrolysis of the resulting o‐aminoaryl ketimine.
ChemInform Abstract: Catalytic Friedel—Crafts Acylation: Magnetic Nanopowder CuFe2O4 as an Efficient and Magnetically Separable Catalyst.
Authors: Parella Ramarao , Naveen Naveen , Kumar Amit , Babu Srinivasarao Arulananda
Published: June 2013

The reaction allows the synthesis of ketones (III) (68 examples) and of sulfone (V).
ChemInform Abstract: Amberlyst A‐26: An Efficient and Reusable Heterogeneous Catalyst for a One‐Pot Oxidation—Cannizarro Reaction.
Authors: Shen Ming‐Gui , Shang Shi‐Bin , Song Zhan‐Qian , Wang Dan , Rao Xiao‐Ping , Gao Hong , Liu He
Published: June 2013

Amberlyst A‐26 efficiently catalyzes the synthesis of α‐hydroxyarylacetic acids (II) (11 examples) from aryl methyl ketones via a tandem oxidation—Cannizarro reaction.
ChemInform Abstract: A Catalytic and tert‐Butoxide Ion‐Mediated Amidation of Aldehydes with para‐Nitro Azides.
Authors: Carbone Giorgio , Burnley James , Moses John E.
Published: June 2013

A new and straightforward synthetic method for the catalytic synthesis of substituted p‐nitroaromatic amides (III) (15 examples) is developed based upon an azido‐amidation mechanism.
ChemInform Abstract: Synthesis and Antimicrobial Activity of Some New Benzo and Naphthonitrile Derivatives.
Authors: Fadda Ahmed A. , Afsah El‐Sayed M. , Awad Radwa S.
Published: June 2013

Among the synthesized compounds, derivative (IIId) exhibits significant activities against Gram‐negative and Gram‐positive bacteria and shows the best antifungal activities against Botrytis fabae.
ChemInform Abstract: A Macrocyclic Aromatic Pyridone Pentamer as a Highly Efficient Organocatalyst for the Direct Arylations of Unactivated Arenes.
Authors: Zhao Huaiqing , Shen Jie , Guo Juanjuan , Ye Ruijuan , Zeng Huaqiang
Published: June 2013

A novel foldamer‐based H‐bond‐rigidified organocatalyst enables the formation of biaryls via direct arylation of unactivated arenes with iodo‐ and bromoarenes (I) in the presence of KOtBu in a transition metal‐free fashion.
ChemInform Abstract: Nickel‐Catalyzed Reductive Cross‐Coupling of Aryl Halides.
Authors: Qian Qun , Zang Zhenhua , Wang Shulin , Chen Yang , Lin Kunhua , Gong Hegui
Published: June 2013

The process takes place under mild conditions to give unsymmetrical biaryls with tolerance for a variety of functional groups.
ChemInform Abstract: Highly Chemoselective Cobalt‐Catalyzed Biaryl Coupling Reactions.
Authors: Guelak Samet , Stepanek Ondrej , Malberg Jennifer , Rad Babak Rezaei , Kotora Martin , Wolf Robert , Jacobi von Wangelin Axel
Published: June 2013

A practical Co‐catalyzed biaryl coupling between deactivated chlorostyrenes (I) and Grignard reagents (II) with unprecedented selectivity is developed.
ChemInform Abstract: One‐Pot Synthesis of Indene Derivatives by CF3SO3H‐Promoted Reactions of Benzylic Alcohols and 1,3‐Dicarbonyl Compounds.
Authors: Zhang Wenxue , Dai Yisi , Zhu Haizhen , Zhang Wei
Published: June 2013

The coupling/cyclization sequence produces indene structures of type (III) as main or exclusive regioisomers.
ChemInform Abstract: Synthesis of Fluorenones via Quaternary Ammonium Salt‐Promoted Intramolecular Dehydrogenative Arylation of Aldehydes.
Authors: Shi Zhuangzhi , Glorius Frank
Published: June 2013

With the aim to obtain biologically interesting substances, fluorenones (II), (IV), (VI)/(VII) and related compounds such as (IX), and (XI)/(XII) are prepared via an intramolecular oxidative acylation process.
ChemInform Abstract: Multifaceted Interception of 2‐Chloro‐2‐oxoacetic Anhydrides: A Catalytic Asymmetric Synthesis of β‐Lactams.
Authors: Huang Li , Zhao Wenjun , Staples Richard J. , Wulff William D.
Published: June 2013

Aziridine‐2‐carboxylic acids (I), (IV), and (VI) react with oxalyl chloride (II) to give N‐carboxyanhydrides (III), β‐lactams (V) or morpholin‐2,3,5‐triones (VII) depending on the nature of the substituent at the 3‐position.
ChemInform Abstract: First Example of the Preparation of Ethyl 4‐Aryl‐2‐carboxymethyl‐2‐methyl‐5‐oxodihydrofuran‐3‐carboxylates Using the Baeyer—Villiger Reaction.
Authors: Zinina E. A. , Poplevina N. V. , Sorokin V. V.
Published: June 2013

Title compounds (II) are obtained by reaction of (I) under Baeyer—Villiger conditions.
ChemInform Abstract: Exploiting the Modularity of Ion‐Paired Chiral Ligands for Palladium‐Catalyzed Enantioselective Allylation of Benzofuran‐2(3H)‐ones.
Authors: Ohmatsu Kohsuke , Ito Mitsunori , Kunieda Tomoatsu , Ooi Takashi
Published: June 2013

For the first time, a highly enantioselective allylation of benzofuran‐2(3H)‐ones is achieved using novel ion‐paired ligands featuring chiral phosphates in combination with either an achiral or a chiral ammonium phosphine.
ChemInform Abstract: Indium Trichloride Catalyzed Regioselective Synthesis of Substituted Pyrroles in Water.
Authors: Suresh Rajendran , Muthusubramanian Shanmugam , Nagaraj Muthupandi , Manickam Govindaswamy
Published: June 2013

A facile protocol allows the synthesis of a broad spectrum of polysubstituted pyrroles and indolinone (XV).
ChemInform Abstract: New Pathway to Pyrrolidinones and Pyrrolizidinones Using Aryl Aldehydes, 3‐Phenyl‐5‐isoxazolone and Secondary Amino Acids.
Authors: Lakshmi Neelakandan Vidhya , Perumal Paramasivan T.
Published: June 2013

Knoevenagel condensation of isoxazolone (I) with aldehydes generates 4‐arylidene‐3‐phenyl‐5‐isoxazolines as intermediates.
ChemInform Abstract: Iron(II) Bromide‐Catalyzed Intramolecular C—H Bond Amination [1,2]‐Shift Tandem Reactions of Aryl Azides.
Authors: Nguyen Quyen , Nguyen Tuyen , Driver Tom G.
Published: June 2013

Iron(II) bromide promotes tandem C—H bond amination 1,2‐migration reactions of ortho‐substituted aryl azides to enable the formation of various 2,3‐disubstituted indoles.
ChemInform Abstract: A Tandem Reduction—Oxidation Protocol for the Conversion of 1‐Keto‐1,2,3,4‐tetrahydrocarbazoles to Carbazoles via Tosylhydrazones Through Microwave Assistance: Efficient Synthesis of Glycozoline, Clausenalene, Glycozolicine, and Deoxycarbazomycin B and the Total Synthesis of Murrayafoline A.
Authors: Chakraborty Suchandra , Chattopadhyay Gautam , Saha Chandan
Published: June 2013

Carbazoles (III), including the title natural derivatives, are synthesized by the title protocol on magnesium sulfate as solid support.
ChemInform Abstract: Gold‐Catalyzed Michael Addition/Intramolecular Annulation Cascade: An Effective Pathway for the Chemoselective‐ and Regioselective Synthesis of Tetracyclic Indole Derivatives in Water.
Authors: Xu Shengtao , Zhou Yu , Xu Jinyi , Jiang Hualiang , Liu Hong
Published: June 2013

Optimum reaction conditions are examined for the synthesis of 28 title compounds of type (III) which are of potential biological interest.