bluuebunny/crossref_metadata_2025 huggingface dataset:
Distinct responses of East Asian summer and winter monsoons to orbital forcing
Authors: Shi Z. , Liu X. , Sun Y. , An Z. , Liu Z. , Kutzbach J.
Published: March 2011

Abstract. Influences of the Earth's orbital forcing on the evolution of East Asian monsoon have been demonstrated with various geological records and climate models. Here, we present time series of climatic proxies from the Chinese Loess Plateau and Sanbao/Hulu caves and the winter/summer monsoon intensity index from a long-term transient climate model simulation. Both the observations and modeling results reveal consistently distinct responses of East Asian summer and winter monsoons to orbital forcing. Different from the dominant local impact on the summer monsoon at the precession scale (~20 ka period), the East Asian winter monsoon is driven predominantly by the obliquity forcing (~40 ka period). We propose that the obliquity forcing controls the meridional insolation difference and therefore exerts a more significant effect on the evolution of the East Asian winter monsoon than expected before.
Identification of hydrological model parameters for flood forecasting using data depth measures
Authors: Krauße T. , Cullmann J.
Published: March 2011

Abstract. The development of methods for estimating the parameters of hydrological models considering uncertainties has been of high interest in hydrological research over the last years. Besides the very popular Markov Chain Monte Carlo (MCMC) methods which estimate the uncertainty of model parameters in the settings of a Bayesian framework, the development of depth based sampling methods, also entitled robust parameter estimation (ROPE), have attracted an increasing research interest. These methods understand the estimation of model parameters as a geometric search of a set of robust performing parameter vectors by application of the concept of data depth. Recent studies showed that the parameter vectors estimated by depth based sampling perform more robust in validation. One major advantage of this kind of approach over the MCMC methods is that the formulation of a likelihood function within a Bayesian uncertainty framework gets obsolete and arbitrary purpose-oriented performance criteria defined by the user can be integrated without any further complications. In this paper we present an advanced ROPE method entitled the Advanced Robust Parameter Estimation by Monte Carlo algorithm (AROPEMC). The AROPEMC algorithm is a modified version of the original robust parameter estimation algorithm ROPEMC developed by Bárdossy and Singh (2008). AROPEMC performs by merging iterative Monte Carlo simulations, identifying well performing parameter vectors, the sampling of robust parameter vectors according to the principle of data depth and the application of a well-founded stopping criterion applied in supervised machine learning. The principals of the algorithm are illustrated by means of the Rosenbrock's and Rastrigin's function, two well known performance benchmarks for optimisation algorithms. Two case studies demonstrate the advantage of AROPEMC compared to state of the art global optimisation algorithms. A distributed process-oriented hydrological model is calibrated and validated for flood forecasting in a small catchment characterised by extreme process dynamics.
Post-processing through linear regression
Authors: Van Schaeybroeck B. , Vannitsem S.
Published: March 2011

Abstract. Various post-processing techniques are compared for both deterministic and ensemble forecasts, all based on linear regression between forecast data and observations. In order to evaluate the quality of the regression methods, three criteria are proposed, related to the effective correction of forecast error, the optimal variability of the corrected forecast and multicollinearity. The regression schemes under consideration include the ordinary least-square (OLS) method, a new time-dependent Tikhonov regularization (TDTR) method, the total least-square method, a new geometric-mean regression (GM), a recently introduced error-in-variables (EVMOS) method and, finally, a "best member" OLS method. The advantages and drawbacks of each method are clarified. These techniques are applied in the context of the 63 Lorenz system, whose model version is affected by both initial condition and model errors. For short forecast lead times, the number and choice of predictors plays an important role. Contrarily to the other techniques, GM degrades when the number of predictors increases. At intermediate lead times, linear regression is unable to provide corrections to the forecast and can sometimes degrade the performance (GM and the best member OLS with noise). At long lead times the regression schemes (EVMOS, TDTR) which yield the correct variability and the largest correlation between ensemble error and spread, should be preferred.
Preclinical Models of Pediatric Solid Tumors (Neuroblastoma) and Their Use in Drug Discovery
Authors: Patterson Danielle M. , Shohet Jason M. , Kim Eugene S.
Published: March 2011

Neuroblastoma is the most common pediatric abdominal solid tumor. This aggressive embryonal malignancy of neural crest origin has a peak age of onset of 22 months, and accounts for ∼11% of all pediatric cancers and 15% of all pediatric cancer deaths. With current treatment protocols, including high‐dose chemotherapy with autologous stem cell transplantation, radiation, and surgery, ∼80% of high‐risk patients go into remission, although the majority relapse and succumb to therapy‐resistant tumors. Long‐term survival rates (>5 years) are <50%. Mouse models of neuroblastoma provide clinically relevant tools for studying the growth and metastasis of this aggressive malignancy, and for testing the efficacy of potentially novel therapeutics in vivo. This unit describes an orthotopic murine model of neuroblastoma using cultured human cells that closely mimics the clinical condition in terms of the bulky intra‐abdominal tumors and other aspects of metastatic disease. Also described are methods for in vivo imaging and monitoring of tumor growth, and procedures for necropsy and tumor preservation for pathological analysis. Curr. Protoc. Pharmacol. 52:14.17.1‐14.17.18. © 2011 by John Wiley & Sons, Inc.
Effect of Recrystallization on Tensile Behavior, Texture, and Anisotropy of Ti‐3Al‐2.5 V Cold Pilgered Tubes
Authors: Bayona‐Carrillo Nicolás , Bozzolo Nathalie , Fundenberger Jean‐Jacques , Thomas Bertrand , Camelin Patrick , Lenarduzzi Emmanuel , Wagner Francis
Published: March 2011

The recrystallized volume fraction of Ti 3Al 2.5 V seamless tubes is measured using electron BackScatter diffraction (EBSD) after annealing under various conditions. Standard tensile tests and contractile strain ratio (CSR) measurements are carried out in order to analyze the effect of recrystallization on the tensile behavior and the anisotropy of the tubes. The tensile tests show anomalous yield‐point phenomena, which become stronger when the recrystallized fraction is increased. CSR value changes through recrystallization, from 0.8 in the cold worked stress relieved (CWSR) state to 1.1 in the fully recrystallized structure. Orientation distribution functions (ODFs) calculated from X‐ray data reveal a decay in the intensity of the crystallographic texture as recrystallization advances. This can explain the tendency toward isotropy when complete recrystallization is achieved.
Molding Micropatterns of Elasticity on PEG‐Based Hydrogels to Control Cell Adhesion and Migration
Authors: Diez Mar , Schulte Vera A. , Stefanoni Filippo , Natale Carlo F. , Mollica Francesco , Cesa Claudia M. , Chen Jingyu , Möller Martin , Netti Paolo A. , Ventre Maurizio , Lensen Marga C.
Published: March 2011

We present an innovative and simple, soft UV lithographic method “FIll‐Molding In Capillaries” (FIMIC) that combines soft lithography with capillary force driven filling of micro‐channels to create smooth hydrogel substrates with a 2D micro‐pattern on the surface. The lithographic procedure involves the molding of a polymer; in our case a bulk PEG‐based hydrogel, via UV‐curing from a microfabricated silicon master. The grooves of the created regular line pattern are consequently filled with a second hydrogel by capillary action. As a result, a smooth surface is obtained with a well‐defined pattern design of the two different polymers on its surface. The FIMIC method is very versatile; the only prerequisite is that the second material is liquid before curing in order to enable the filling process. In this specific case we present the proof of principle of this method by applying two hydrogels which differ in their crosslinking density and therefore in their elasticity. Preliminary cell culture studies on the fabricated elasticity patterned hydrogels indicate the preferred adhesion of the cells to the stiffer regions of the substrates, which implies that the novel substrates are a very useful platform for systematic cell migration studies, e.g. more fundamental investigation of the concept of “durotaxis”.
The Control of Shrinkage and Thermal Instability in SU‐8 Photoresists for Holographic Lithography
Authors: Denning Robert G. , Blanford Christopher F. , Urban Henning , Bharaj Harpal , Sharp David N. , Turberfield Andrew J.
Published: March 2011

The negative‐tone epoxy photoresist, SU‐8, expands ≈1% by volume after postexposure baking. However, if the maximum optical fluence is comparable to that at the insolubility threshold, as in a holographic exposure, the developed resist shrinks (≈35% by volume) due to the removal of light oligomers not incorporated into the polymeric network. IR spectroscopy shows that, at this level of exposure, only 15% of the epoxy groups in the insoluble polymer have reacted; consequently microstructural elements soften and collapse at >100 °C. When the light oligomers are removed, the sensitivity of the resist is unchanged, provided that 5% (w/w) of a high‐molecular‐weight reactive plasticizer (glycidoxy‐terminated polyethylene glycol) is added, but it shrinks less on development and, when used as a photonic crystal template, shows improved uniformity with less cracking and buckling. Reinforcing the polymer network by reaction with the polyfunctional amine (bis‐N,N′‐(3‐aminopropyl)ethylenediamine) increases the extent of cross‐linking and the thermal stability, allowing inverse replicas of photonic crystal templates to be fabricated from both Al:ZnO and Zr3N4 using atomic layer deposition at temperatures up to 200 °C.
Permeation through CO2selective glassy polymeric membranes in the presence of hydrogen sulfide
Authors: Scholes Colin A. , Stevens Geoff W. , Kentish Sandra E.
Published: March 2011

Minor components present in feed gas streams can have a significant influence on the separation performance of polymeric membranes. Hydrogen sulfide is present in many of the processes where CO2 capture is possible and can therefore undergo competitive sorption with CO2 for transport through the membrane, as well as influence the membrane morphology inducing plasticization. This study investigates the change in CO2 permeability and CO2/N2 selectivity of two glassy polymeric membranes; polysulfone and 6FDA‐TMPDA, when 500 ppm H2S is present in the gas mixture. The outcomes of this study reveal that H2S in trace amounts has a strong influence on the separation performance of both membranes. For both membranes, a plasticization partial pressure ∼0.5–0.6 kPa H2S is observed. H2S competitive sorption is also observed and is modeled by competitive dual‐sorption theory. Results suggest that mixed gas permeation influences the amount of each gas immobilized within the Langmuir voids in addition to the expected competitive sorption effects. © 2011 American Institute of Chemical Engineers AIChE J, 2012
Measurement of intraocular and intracranial pressure: Is there a relationship?
Authors: Kirk Tyler , Jones Keith , Miller Spencer , Corbett James
Published: March 2011

Objective:

To study whether noninvasive, intraocular pressure (IOP) measurements significantly correlate with standard intracranial pressure (ICP) measurements.

Methods:

This prospective, blinded study enrolled 46 patients who were undergoing medically indicated lumbar puncture (LP). IOP was measured by applanation tonometry immediately prior to measuring LP opening pressure. One patient was excluded due to unsuccessful ICP measurement.

Results:

In the 45 patients to successfully undergo IOP and ICP measurement, there was no significant relationship between ICP and average IOP for both eyes (r = −0.005). There was no significant relationship between ICP and IOP in either eye, when studied individually(r = 0.03 ocular dexter [OD], r = −0.05 ocular sinister [OS]). There was no significant relationship between ICP and IOP when the eye best correlated to the patient's ICP was chosen (r = −0.01).

Interpretation:

No significant relationship between ICP and IOP was observed. Noninvasive IOP measurements do not predict ICP.ANN NEUROL 2011;
Radical‐Transfer Hydroamination of Olefins with N‐Aminated Dihydropyridines
Authors: Chou Chih‐Ming , Guin Joyram , Mück‐Lichtenfeld Christian , Grimme Stefan , Studer Armido
Published: March 2011

An efficient synthesis of N‐phthalimidyl, benzamidyl, acetamidyl, carbamoyl, and ureayl derivatives of dihydropyridines and the application of these reagents as precursors for N‐centered radicals are presented. These aminated dihydropyridines could be used in radical‐transfer hydroamination reactions of various electron‐rich as well as nonactivated olefins in the presence of thiols as polarity‐reversal catalysts. These reactions worked without the aid of any transition metal. Steric and electronic effects exerted by the N‐substitutents of the N‐centered radicals are discussed. In contrast to most metal‐catalyzed processes, the radical hydroamination delivered the opposite regioisomer with excellent anti‐Markovnikov selectivity. Hydroamination products were obtained as protected amines that are readily isolated.
Near‐infrared laser delivery of nanoparticles to developing embryos: A study of efficacy and viability
Authors: Umanzor‐Alvarez Jose , Wade Emily C. , Gifford Aliya , Nontapot Kankowan , Cruz‐Reese Ariana , Gotoh Tetsuya , Sible Jill C. , Khodaparast Giti A.
Published: March 2011

Targeted delivery of materials to individual cells remains a challenge in nanoscience and nanomedicine. Near infrared (NIR) laser injection may be a promising alternative to manual injection (where the micropipet diameter limits targeting to small cells) or other laser techniques (such as picosecond green and UV lasers, which can be damaging to cells). However, the efficiency with which NIR pulses can deliver nanoparticles and any adverse effects on living cells needs thorough testing. Toward this end, we have determined the efficacy and toxicity of delivering quantum dots (QDs) into cells of Xenopus laevis embryos by NIR laser injection. Because this model system provides not only living cells but also a developing organism, we were able to assess relatively long‐term effects of NIR pulses on embryonic development (through the tadpole stage). We developed parameters for NIR pulses that did not affect embryonic viability or morphology and delivered QDs as effectively as manual injection. Higher intensities of NIR pulses caused permanent damage to the targeted cells, and thus NIR pulses may also prove useful for ablation of specific cells within tissues.
Differentiation‐inducing ability of sophorolipids of oleic and linoleic acids using a glioma cell line
Authors: Joshi‐Navare Kasturi , Shiras Anjali , Prabhune Asmita
Published: March 2011

Sophorolipids are biosurfactants produced by non‐pathogenic yeasts. They show structural similarity with the membrane components of mammalian cells, i.e., glycosphingolipids and gangliosides, which are involved in processes such as signaling, oncogenesis, and differentiation. Sophorolipids have been reported to induce differentiation in several leukemic cell lines, cell death via apoptosis in a human liver cancer cell line, and necrosis in a pancreatic adenocarcinoma cell line. Here we report, for the first time, the effects of precursor fatty acids and sophorolipids of oleic and linoleic acids in pure acidic and crude forms on LN‐229, a glioma cell line. In response to different sophorolipid forms, various morphological changes were observed, such as formation of long thread‐like extensions arising from the ends of the cells, cell alignment, cell elongation and bundle formation in a dose‐dependent manner. In this study we present the morphological evidence of the potential of sophorolipids as differentiation inducers.
A colorimetric assay for determination of methyl parathion using recombinant methyl parathion hydrolase
Authors: Anh Dau Hung , Cheunrungsikul Kritsananporn , Wichitwechkarn Jesdawan , Surareungchai Werasak
Published: March 2011

A simple, rapid and sensitive colorimetric dipstick assay for the detection of the organophosphorous insecticide methyl parathion (MPT) residue in vegetables was developed. The assay was based on the hydrolysis of MPT by a recombinant methyl parathion hydrolase (recMPH), the encoding gene of which was isolated from Burkholderia cepacia, a soil bacterium indigenous to Thailand. This reaction generates protons leading to a change in pH that correlates with the amount of MPH present. Hence, the pH indicator bromothymol blue was used to monitor the MPH hydrolysis as the associated color changes can be observed by the naked eye. The recMPH was immobilized on a PVDF membrane to establish a dipstick assay format. The assays could detect MPT residues in spiked vegetable samples at the concentration of 1 mg/L without using analytical instrumentation. The test is reusable and stable for up to 3 months in the absence of any preservatives.
Gonadotropin purification from horse serum applying magnetic beads
Authors: Müller Christine , Preußer‐Kunze Andrea , Wagner Kerstin , Franzreb Matthias
Published: March 2011

The glycoprotein hormone equine chorionic gonadotropin (eCG) is a commercial product used in animal breeding as well as in veterinary medicine. The current state of the art for the purification of eCG from serum is pH fractionation with metaphosphoric acid, two ethanol precipitation steps as well as dialysis followed by fixed‐bed chromatography. Two simplified processes, including the use of magnetic microsorbents for the purification of eCG have been developed. The processes reduce or even omit the use of organic solvents and the required solid‐liquid separation steps, thus making them potential candidates for a first commercial application of magnetic beads in bioprocessing.
Chain length effects on helix‐hairpin distribution in short peptides with Aib‐DAla and Aib‐Aib Segments
Authors: Rajagopal Appavu , Aravinda Subrayashastry , Raghothama Srinivasarao , Shamala Narayanaswamy , Balaram Padmanabhan
Published: March 2011

The Aib‐DAla dipeptide segment has a tendency to form both type‐I′/III′ and type‐I/III β‐turns. The occurrence of prime turns facilitates the formation of β‐hairpin conformations, while type‐I/III turns can nucleate helix formation. The octapeptide Boc‐Leu‐Phe‐Val‐Aib‐DAla‐Leu‐Phe‐Val‐OMe (1) has been previously shown to form a β‐hairpin in the crystalline state and in solution. The effects of sequence truncation have been examined using the model peptides Boc‐Phe‐Val‐Aib‐Xxx‐Leu‐Phe‐NHMe (2, 6), Boc‐Val‐Aib‐Xxx‐Leu‐NHMe (3, 7), and Boc‐Aib‐Xxx‐NHMe (4, 8), where Xxx = DAla, Aib. For peptides with central Aib‐Aib segments, Boc‐Phe‐Val‐Aib‐Aib‐Leu‐Phe‐NHMe (6), Boc‐Val‐Aib‐Aib‐Leu‐NHMe (7), and Boc‐Aib‐Aib‐NHMe (8) helical conformations have been established by NMR studies in both hydrogen bonding (CD3OH) and non‐hydrogen bonding (CDCl3) solvents. In contrast, the corresponding hexapeptide Boc‐Phe‐Val‐Aib‐DAla‐Leu‐Phe‐Val‐NHMe (2) favors helical conformations in CDCl3 and β‐hairpin conformations in CD3OH. The β‐turn conformations (type‐I′/III) stabilized by intramolecular 4→1 hydrogen bonds are observed for the peptide Boc‐Aib‐DAla‐NHMe (4) and Boc‐Aib‐Aib‐NHMe (8) in crystals. The tetrapeptide Boc‐Val‐Aib‐Aib‐Leu‐NHMe (7) adopts an incipient 310‐helical conformation stabilized by three 4→1 hydrogen bonds. The peptide Boc‐Val‐Aib‐DAla‐Leu‐NHMe (3) adopts a novel α‐turn conformation, stabilized by three intramolecular hydrogen bonds (two 4→1 and one 5→1). The Aib‐DAla segment adopts a type‐I′ β‐turn conformation. The observation of an NOE between Val (1) NH↔HNCH3 (5) in CD3OH suggests, that the solid state conformation is maintained in methanol solutions. © 2011 Wiley Periodicals, Inc. Biopolymers (Pept Sci) 96: 744–756, 2011.
Measuring thermodynamic details of DNA hybridization using fluorescence
Authors: You Yong , Tataurov Andrey V. , Owczarzy Richard
Published: March 2011

Modern real‐time PCR systems make it easy to monitor fluorescence while temperature is varied for hundreds of samples in parallel, permitting high‐throughput studies. We employed such system to investigate melting transitions of ordered nucleic acid structures into disordered random coils. Fluorescent dye and quencher were attached to oligonucleotides in such a way that changes of fluorescence intensity with temperature indicated progression of denaturation. When fluorescence melting data were compared with traditional ultraviolet optical experiments, commonly used dye/quencher combinations, like fluorescein and tetramethylrhodamine, showed substantial discrepancies. We have therefore screened 22 commercially available fluorophores and quenchers for their ability to reliably report annealing and melting transitions. Dependence of fluorescence on temperature and pH was also investigated. The optimal performance was observed using Texas Red or ROX dyes with Iowa Black RQ or Black Hole quenchers. These labels did not alter two‐state nature of duplex melting process and provided accurate melting temperatures, free energies, enthalpies, and entropies. We also suggest a new strategy for determination of DNA duplex thermodynamics where concentration of a dye‐labeled strand is kept constant and its complementary strand modified with a quencher is added at increasing excess. These methodological improvements will help build predictive models of nucleic acid hybridization. © 2011 Wiley Periodicals, Inc. Biopolymers 95: 472–486, 2011.
Cage‐Shaped Borate Esters with Tris(2‐oxyphenyl)methane or ‐silane System Frameworks Bearing Multiple Tuning Factors: Geometric and Substituent Effects on Their Lewis Acid Properties
Authors: Yasuda Makoto , Nakajima Hideto , Takeda Ryosuke , Yoshioka Sachiko , Yamasaki Satoshi , Chiba Kouji , Baba Akio
Published: March 2011

Boron complexes that contain new tridentate ligands, tris(o‐oxyaryl)methanes and ‐silanes, were prepared. These complexes had a cage‐shaped structure around a boron center and showed higher Lewis acidity and catalytic activity than open‐shaped boron compounds. The cage‐shaped ligands determined the properties of the borates by altering the geometry and were consistently bound to the metal center by chelation. The synthesized compounds were L⋅B(OC6H4)3CH, L⋅B(OC6H4)3SiMe, and its derivatives (L=THF or pyridine as an external ligand). Theoretical calculations suggested that the cage‐shaped borates had a large dihedral angle (Cipso‐O‐B‐O) compared with open‐shaped borates. The geometric effect due to the dihedral angle means that compared with open‐shaped, the cage‐shaped borates have a greater Lewis acidity. The introduction of electron‐withdrawing groups on the aryl moieties in the cage‐shaped framework increased the Lewis acidity. Substitution of a bridgehead Si for a bridgehead C decreased the Lewis acidity of the boron complexes because the large silicon atom reduces the dihedral angle of Cipso‐O‐B‐O. The ligand‐exchange rates of the para‐fluoro‐substituted compound B(OC6H3F)3CH and the ortho‐phenyl‐substituted compound B(OC6H3Ph)3CH were less than that of the unsubstituted borate B(OC6H4)3CH. The ligand‐exchange rate of B(OC6H4)3SiMe was much faster than that of B(OC6H4)3CH. A hetero Diels–Alder reaction and Mukaiyama‐type aldol reactions were more effectively catalyzed by cage‐shaped borates than by the open‐shaped borate B(OPh)3 or by the strong Lewis acid BF3⋅OEt2. The cage‐shaped borates with the bulky substituents at the ortho‐positions selectively catalyzed the reaction with less sterically hindered substrates, while the unsubstituted borate showed no selectivity.
ChemInform Abstract: New Ferroelectric Aurivillius Oxides: Incorporation of Sc3+ in Stoichiometric Compositions.
Authors: Sivakumar Thathan , Itoh Mitsuru
Published: March 2011

The compounds Bi2.1Sr0.9Ta1.95Sc0.05 O9, Bi2.2Sr0.8Ta1.90Sc0.10 O9, and Bi2.15Sr0.7La0.15Ta1.85 Sc0.15O9 containing small amounts of Sc at the B site are prepared by high temperature solid state reactions and characterized by powder XRD and dielectric and ferroelectric measurements.
ChemInform Abstract: Iron and Manganese Pyrophosphates as Cathodes for Lithium‐Ion Batteries.
Authors: Zhou Hui , Upreti Shailesh , Chernova Natasha A. , Hautier Geoffroy , Ceder Gerbrand , Whittingham M. Stanley
Published: March 2011

The compounds Li2Mn1‐yFeyP2O7 (y = 0, 0.2, 0.5, 0.8, 1) are synthesized by evaporation of aqueous solutions of LiOAc, Fe(OAc)2, Mn(OAc)2, and NH4H2PO4, followed by annealing (H2/He, 400—700 °C).
ChemInform Abstract: Hydrothermal Synthesis of Cu3 (OH)2V2O7·nH2O Nanoparticles and Its Application in Lithium Ion Battery.
Authors: Ni Shibing , He Deyan , Yang Xuelin , Li Tao
Published: March 2011

The title nanoparticles are hydrothermally synthesized from aqueous solutions of V2O5, Cu(NO3)2, hexamethylenetetramine, and Na2SO4 (autoclave, 140 °C, 24 h) and characterized by XRD, FE‐SEM, FTIR and Raman spectroscopy, and electrochemical measurements.
ChemInform Abstract: Magnesium Imide: Synthesis and Structure Determination of an Unconventional Alkaline Earth Imide from Decomposition of Magnesium Amide.
Authors: Dolci Francesco , Napolitano Emilio , Weidner Eveline , Enzo Stefano , Moretto Pietro , Brunelli Michaela , hansen Thomas , Fichtner Maximilian , Lohstroh Wiebke
Published: March 2011

Mg(ND2)2 is prepared by ball milling of MgD2 under 8 bar ND3 (12 h) followed by annealing at 300 °C under 8 bar ND3.
ChemInform Abstract: A Giant Polyaluminum Species S—Al32 and Two Aluminum Polyoxocations Involving Coordination by Sulfate Ions S—Al32 and S—K—Al13.
Authors: Sun Zhong , Wang Hui , Tong Honggeer , Sun Shaofan
Published: March 2011

(II) and (III) are the first compounds containing aluminum polyoxocations coordinated by sulfate ions.
ChemInform Abstract: Stabilization of Sn2+ in K10Sn3(P2Se6)4 and Cs2SnP2Se6 Derived from a Basic Flux.
Authors: Chung In , Kanatzidis M. G.
Published: March 2011

The title compounds are prepared by reaction of a stoichiometric mixture of M2Se (M: K, Cs), Sn, P, and Se (fused silica tubes, 800 °C, 2 h).
ChemInform Abstract: Direct Preparation of K0.5Na0.5NbO3 Powders.
Authors: Jiang Heng , Su Ting Ting , Gong Hong , Zhai Yu Chun
Published: March 2011

Powders of the title compound are prepared by solid state reaction of stoichiometric mixtures of NH4 [NbO(C2O4)2(H2O)2] (H2O)3 and sodium potassium tartrate (500—800 °C, 3 h).
ChemInform Abstract: Animal Bone Meal as an Efficient Catalyst for Crossed‐Aldol Condensation.
Authors: Riadi Y. , Mamouni R. , Azzalou R. , Boulahjar R. , Abrouki Y. , El Haddad M. , Routier S. , Guillaumet G. , Lazar S.
Published: March 2011

Bis(arylmethylidene)cycloalkanones (III) are prepared in excellent yields using NaNO3‐doped animal bone meal as highly efficient catalyst.
ChemInform Abstract: The Stereoselective Synthesis of Highly Functionalized Tertiary 3‐Aminoindoles/Anilines or Dihydropyrroles from C‐(3‐Indolyl)‐N‐aryl and C,N‐Diaryl Nitrones.
Authors: Velezheva V. S. , Azev V. N. , Kornienko A. G. , Peregudov A. S. , Godovikov I. A. , Sebyakin Yu. L.
Published: March 2011

The reaction of a variety of diaryl nitrones with sodium malonates is investigated.
ChemInform Abstract: “One‐Pot” Tandem C—H Borylation/1,4‐Conjugate Addition/Reduction Sequence.
Authors: Tajuddin Hazmi , Shukla Lena , Maxwell Aoife C. , Marder Todd B. , Steel Patrick G.
Published: March 2011

β‐Aryl‐substituted ketones are obtained employing Me‐O‐tBu as nonreducing solvent in the addition step.
ChemInform Abstract: Nickel‐Catalyzed Cross‐Coupling of Potassium Aryl‐ and Heteroaryltrifluoroborates with Unactivated Alkyl Halides.
Authors: Molander Gary A. , Argintaru O. Andreea , Aron Ioana , Dreher Spencer D.
Published: March 2011

Nearly stoichiometric amounts of the organoboranes are converted and a broad spectrum of heterocyclic skeletons and functional groups is tolerated.
ChemInform Abstract: Palladium‐Catalyzed Hydrophenoxycarbonylation of Internal Alkynes by Phenol and CO: The Use of Zn for the Formation of Active Catalyst.
Authors: Kuniyasu Hitoshi , Yoshizawa Takahiro , Kambe Nobuaki
Published: March 2011

It is proposed, that the reduction of Pd(OAc)2 by zinc in the presence of dppp gives a highly active Pd(0)‐complex which serves as catalyst for the hydrophenoxycarbonylation of alkynes to give α,β‐unsaturated esters with excellent regio‐ and stereoselectivity.
ChemInform Abstract: Chemoselective O‐tert‐Butoxycarbonylation of Phenols Using 6,7‐Dimethoxyisoquinoline as a Novel Organocatalyst.
Authors: Saito Yukako , Yoshimura Yuichi , Takahata Hiroki
Published: March 2011

The optimized reaction conditions can be applied to a broad spectrum of substrates.
ChemInform Abstract: Synthesis of Monofluoroalkenes via Julia—Kocienski Reaction.
Authors: Prakash G. K. Surya , Shakhmin Anton , Zibinsky Mikhail , Ledneczki Istvan , Chacko Sujith , Olah George A.
Published: March 2011

The previously unknown aryl fluoromethyl sulfone (III) is synthesized and used in the Julia—Kocienski fluoroolefination reaction with various aldehydes and ketones.
ChemInform Abstract: An Expeditious and Environmentally Benign Preparation of Aryl Halides from Aryl Amines by Solvent‐Free Grinding.
Authors: Moon Mi Eun , Choi Younghwa , Lee Young Min , Vajpayee Vaishali , Trusova Marina , Filimonov Victor D. , Chi Ki‐Whan
Published: March 2011

Various substituted aryl halides are synthesized via arenediazonium tosylate salt intermediates in an environmentally friendly manner.
ChemInform Abstract: 6‐Membered Pseudocyclic IBX Acids: Synthesis, X‐Ray Structural Characterizations, and Oxidation Reactivities in Common Organic Solvents.
Authors: Moorthy Jarugu Narasimha , Senapati Kalyan , Parida Keshaba Nanda
Published: March 2011

Two new periodinanes are prepared and their structures are determined by X‐ray analysis.
ChemInform Abstract: Indium‐Catalyzed Homo‐Nazarov Cyclizations of Alkenyl Cyclopropyl Ketones.
Authors: Patil Dadasaheb V. , Phun Lien H. , France Stefan
Published: March 2011

Donor—acceptor cyclopropyl vinyl ketones bearing a secondary electron acceptor such as an ester group stabilize the cyclic Nazarov intermediate.
ChemInform Abstract: Polystyrene‐Anchored Palladium(II) Complex as an Efficient and Reusable Catalyst for Suzuki Cross‐Coupling Reaction in Water Medium.
Authors: Islam Manirul , Mondal Paramita , Tuhina Kazi , Hossain Dildar , Roy Anupam Singha
Published: March 2011

The new heterogeneous palladium(II) catalyst can be prepared readily from inexpensive and commercially available starting materials.
ChemInform Abstract: Deoxybenzoins from Stille Carbonylative Cross‐Couplings Using Molybdenum Hexacarbonyl.
Authors: Saevmarker Jonas , Lindh Jonas , Nilsson Peter
Published: March 2011

The process works well with benzyl bromides and chlorides.
ChemInform Abstract: Synthesis of (E)‐α,β‐Unsaturated Ketones by Hydrostannylation‐Stille Tandem Reaction of Alkylarylacetylenes with Acyl Chlorides.
Authors: Li Jianying , Yu Yan , Hao Wenyan , Cai Mingzhong
Published: March 2011

An efficient and stereoselective one‐pot synthesis of (E)‐α,β‐unsaturated ketones (III) (12 examples) is developed.
ChemInform Abstract: Synthesis of Stilbene and Distyrylbenzene Derivatives Through Rhodium‐Catalyzed ortho‐Olefination and Decarboxylation of Benzoic Acids.
Authors: Mochida Satoshi , Hirano Koji , Satoh Tetsuya , Miura Masahiro
Published: March 2011

The reaction proceeds highly regioselectively and the meta‐substituted stilbene derivatives are formed exclusively.
ChemInform Abstract: Four‐Component Reaction Between Aryl Aldehydes, Ethyl Cyanoacetate and Dimethyl Acetylenedicarboxylate in the Presence of Cyclohexyl Isocyanide.
Authors: Anary‐Abbasinejad Mohammad , Hassanabadi Alireza , Aiinparast Farzaneh
Published: March 2011

The simple, efficient and inexpensive synthesis of cyclopentadiene derivatives (V) starts from easily available starting materials, is a single‐product reaction, and includes a simple work‐up.
ChemInform Abstract: Sulfonation of Phenalenone Revisited: Preparation and Characterization of Sodium 1H‐Phenalene‐1‐one‐5‐sulfonate.
Authors: Benniston Andrew C. , Bunn Alex
Published: March 2011

In contrast to previous literature reports the sulfonation of phenalenone (I) leads to product (II), a highly water‐soluble red dye.
ChemInform Abstract: Epoxidation of 1,4‐Diaroyl Ethene Derivatives in the Presence of UHP or H2O2.
Authors: Mahmoodi Nosrat O. , Yazdanbakhsh Mohammad R. , Ghanbari Fateme
Published: March 2011

The urea‐ H2O2 complex (UHP) or 30% aqueous H2O2 are environmentally friendly and industrially useful reagents for the epoxidation of title compounds (I).
ChemInform Abstract: Epoxidation by Sodium Chlorite with Aldehyde‐Promoted Chlorine Dioxide Formation.
Authors: Jangam Ashok , Richardson David E.
Published: March 2011

A novel method is developed using formaldehyde as catalyst for the oxidation of sodium chlorite to chlorine dioxide.
ChemInform Abstract: Tellurium in Organic Synthesis: A New Approach to Trisubstituted γ‐Butyrolactones with trans—trans Relative Stereochemistry. Total Enantioselective Synthesis of (‐)‐Blastmycinolactol (VIa), (+)‐Blastmycinone (VIIa), (‐)‐NFX‐2 (VIb), and (+)‐Antimycinone (VIIb).
Authors: Ferrarini Renan S. , Dos Santos Alcindo A. , Comasseto Joao V.
Published: March 2011

Starting from (Z)‐vinylic hydroxytellurides (I), a straightforward synthesis of the title compounds is carried out.
ChemInform Abstract: Tandem One‐Pot Synthesis of α‐(Aminomethylene)‐γ‐butyrolactones via Regioselective Epoxide Ring‐Opening with the Blaise Reaction Intermediate.
Authors: Ko Young Ok , Chun Yu Sung , Kim Youngmee , Kim Sung Jin , Shin Hyunik , Lee Sang‐gi
Published: March 2011

The reaction of the Reformatsky reagent derived from ethyl bromoacetate and subsequent coupling of the resulting Blaise intermediate with oxiranes allows the synthesis of the title compounds in fair yields.
ChemInform Abstract: N‐(2‐Pyridylmethyl)imines as Azomethine Precursors in Catalytic Asymmetric [3 + 2] Cycloadditions.
Authors: Padilla Silvia , Tejero Ruben , Adrio Javier , Carretero Juan C.
Published: March 2011

The 2‐pyridyl unit is essential as activating group in the formation of an azomethine intermediate.
ChemInform Abstract: Iron‐Catalyzed Oxidative Homo‐Coupling of Indoles via C—H Cleavage.
Authors: Niu Tianmin , Zhang Yuhong
Published: March 2011

A new method for the oxidative dimerization of indoles is demonstrated using molecular oxygen in the presence of catalytic FeCl3.
ChemInform Abstract: Reaction of Pyrano[3,4‐b]indolones with Aliphatic Amines and N,N‐Dimethylhydrazine.
Authors: Livadiotou Despina , Hatzimimikou Dimitra , Tsoleridis Constantinos A. , Stephanidou‐Stephanatou Julia
Published: March 2011

The title reactions proceed with cleavage of the pyranone ring furnishing amide or hydrazide derivatives, respectively.
ChemInform Abstract: Direct Cyclization of ortho‐(1H‐Pyrrol‐1‐yl)aryl and Heteroaryl Carboxylic Acids into Fused Pyrrolizinones.
Authors: Aiello Francesca , Garofalo Antonio , Grande Fedora
Published: March 2011

Intramolecular Friedel—Crafts acylation of pyrrole‐substituted aromatic acids in the presence of triphosgene affords fused pyrrolizinones.
ChemInform Abstract: Synthesis, Crystal Structure and Fungicidal Activities of New Type Oxazolidinone‐Based Strobilurin Analogues.
Authors: Li Yuhao , Liu Rui , Yan Zhangwei , Zhang Xiangning , Zhu Hongjun
Published: March 2011

A series of novel oxazolidinone‐based strobilurin analogues (III) is synthesized and evaluated in vitro and in vivo.
ChemInform Abstract: Design and Synthesis of Novel Methylene‐bis‐fused Pyrazoles as Biologically Active Molecules.
Authors: Reddy Ch. Sanjeeva , Srinivas A. , Sunitha M. , Nagaraj A.
Published: March 2011

Novel methylene‐bis‐fused pyrazoles (VIII) and (XI) are designed, synthesized and evaluated for their antimicrobial COX‐2 inhibitory activity.
ChemInform Abstract: Synthesis of 2,3‐Dihydroimidazo[2,1‐b]thiazole Derivatives via Cyclization of N‐Allylimidazoline‐2‐thiones.
Authors: Jasinski Marcin , Mloston Grzegorz , Heimgartner Heinz
Published: March 2011

Title compounds (V) are synthesized by iodocyclization of easily available allyl derivatives (IV).
ChemInform Abstract: Heterocyclic Systems Containing Bridgehead Nitrogen Atom: Synthesis and Evaluation of Biological Activity of Imidazo[2,1‐b]‐1,3,4‐thiadiazolo[2,3‐c]‐s‐triazoles, s‐Triazolo[3,4‐b]‐1,3,4‐thiadiazolo[3,2‐b]imidazo[4,5‐b]quinoxaline and bis‐(s‐Triazolo[3,4‐b]‐1,3,4‐thiadiazolo[3,2‐b][imidazo [4,5‐b]cyclohexane]‐5a,6a‐diene).
Authors: Kumar Parvin , Kumar Ashwani , Mohan Jag , Makrandi J. k.
Published: March 2011

The novel condensed heterocycles (V), (VII), (IX), and (X) are screened for their antibacterial (S.
ChemInform Abstract: Light‐Induced Copper(I)‐Catalyzed Click Chemistry.
Authors: Tasdelen Mehmet Atilla , Yagci Yusuf
Published: March 2011

The effect of irradiation with visible light (350nm) in the Cu‐catalyzed highly regioselective 1,3‐dipolar cycloaddition of benzyl azide to terminal alkynes is demonstrated to give 1,4‐disubstituted 1,2,3‐triazoles in excellent yields.
ChemInform Abstract: Reactions of Terminal Polyynes with Benzyl Azide.
Authors: Luu Thanh , Medos Boris J. , Graham Erin R. , Vallee Danielle M. , McDonald Robert , Ferguson Michael J. , Tykwinski Rik R.
Published: March 2011

In the presence of CuSO4 and ascorbic acid terminal di‐, tri‐, tetra‐, and pentaynes are found to undergo regioselective reaction with benzyl azide to afford 4‐ethynyl‐, 4‐butadiynyl‐, 4‐hexatriynyl‐, and 4‐octatetraynyl‐1,2,3‐triazoles.
ChemInform Abstract: Practical Synthesis of Functionalized 1,5‐Disubstituted 1,2,4‐Triazole Derivatives.
Authors: Xu Yingju , McLaughlin Mark , Bolton Emily N. , Reamer Robert A.
Published: March 2011

It allows a facile and efficient access to title compounds like (VIII) and (XIII).
ChemInform Abstract: Synthesis and Biological Screening of Novel Derivatives of 3‐(N‐Substituted carboxamidoethylthio)‐(4H)‐1,2,4‐triazoles.
Authors: Manikrao Anil M. , Fursule Ravindra A. , Rajesh K. S. , Kunjwani Harish K. , Sabale Prafulla M.
Published: March 2011

All triazoles (III) (11 examples) show potent antiinflammatory effects.
ChemInform Abstract: Nitraminofurazans in Aza‐Michael Reactions.
Authors: Sheremetev Aleksei B. , Aleksandrova Natal'ya S. , Bykov Andrei A. , Struchkova Marina I.
Published: March 2011

Primary nitraminofurazans react with α,β‐unsaturated carbonyl acceptors (II) in the absence of any catalyst to the Michael adducts (III).
ChemInform Abstract: Asymmetric Bromolactonization Catalyzed by a C3‐Symmetric Chiral Trisimidazoline.
Authors: Murai Kenichi , Matsushita Tomoyo , Nakamura Akira , Fukushima Shunsuke , Shimura Masato , Fujioka Hiromichi
Published: March 2011

The reaction proceeds enantioselectively and can be easily performed on gram scale.
ChemInform Abstract: NHC‐Catalyzed Michael Addition to α,β‐Unsaturated Aldehydes by Redox Activation.
Authors: De Sarkar Suman , Studer Armido
Published: March 2011

Enals react with various 1,3‐dicarbonyl compounds as redox‐activated Michael acceptors in the presence of TAZ as NHC precursor and a bisphenol derived quinone TBQ as the organic oxidant to produce dihydropyranones.
ChemInform Abstract: Synthesis of Functionalized Chromans by PBu3‐Catalyzed Reactions of Salicylaldimines and Salicylaldehydes with Allenic Ester.
Authors: Sun Yin‐Wei , Guan Xiao‐Yang , Shi Min
Published: March 2011

The title reactions afford a broad spectrum of synthetically important benzopyran structures.
ChemInform Abstract: Reactivity of Functionalized N,S‐Ketene Acetal: Regioselective Construction of Tetrahydrobenzo[b]pyran and Chromeno[2,3‐b]quinoline Derivatives.
Authors: Li Ming , Hou Yan‐Li , Wen Li‐Rong , Gong Fu‐Meng
Published: March 2011

NEt3‐mediated coupling of the ketene acetal (I) with the dione (II) and aromatic aldehydes results in new, simple, and regioselective formation of tetrahydrobenzopyrans of type (IV).
ChemInform Abstract: Synthesis and anti‐Helicobacter pylori Activity of 4‐(Coumarin‐3‐yl)thiazol‐2‐ylhydrazone Derivatives.
Authors: Chimenti Franco , Bizzarri Bruna , Bolasco Adriana , Secci Daniela , Chimenti Paola , Granese Arianna , Carradori Simone , D'Ascenzio Melissa , Scaltrito M. Maddalena , Sisto Francesca
Published: March 2011

A variety of new coumarin—thiazole conjugated systems (III) (31 examples) is synthesized by Hantzsch condensation and evaluated for a selective activity against H.
ChemInform Abstract: An Efficient Protocol for Multicomponent Synthesis of Spirooxindoles Employing L‐Proline as Catalyst at Room Temperature.
Authors: Raghuvanshi Dushyant Singh , Singh Krishna Nand
Published: March 2011

An efficient three‐component, one‐pot synthesis of pharmacologically interesting spirooxindoles is described.
ChemInform Abstract: New Vilsmeier Reaction for Facile Synthesis of 4‐Phenyl‐2,4‐dihydrochromeno[4,3‐c]pyrazoles with Bis(trichloromethyl) carbonate/DMF.
Authors: Chen Zhiwei , Yang Yanyan , Su Weike
Published: March 2011

A mild and efficient method allows the synthesis of title compounds (III) from the easily available flavanone derivatives (I).
ChemInform Abstract: Synthesis and Antiinflammatory Activity of 3‐Indolyl Pyridine Derivatives Through One‐Pot Multicomponent Reaction.
Authors: Thirumurugan Prakasam , Mahalaxmi S. , Perumal Paramasivan T.
Published: March 2011

A one‐pot four‐component reaction is employed for the synthesis of derivatives of type (V).
ChemInform Abstract: Synthesis of 2‐(1H‐Indol‐3‐yl)pyridine Derivatives Through Multicomponent Reaction
Authors: Geng Li‐Jun , Feng Guo‐Liang , Yu Jiu‐Gao
Published: March 2011

of chalcone, 3‐(2‐cyanoacetyl)‐1H‐indole, and ammonium acetate
ChemInform Abstract: A Modular, Efficient, and Stereoselective Synthesis of Substituted Piperidin‐4‐ols.
Authors: Cui Li , Li Chaoqun , Zhang Liming
Published: March 2011

The convenient one‐pot procedure involves Au‐catalyzed cyclization of amides, chemoselective reduction and spontaneous Ferrier rearrangement.
ChemInform Abstract: Antiinflammatory, Analgesic, Anticonvulsant and Antiparkinsonian Activities of Some Pyridine Derivatives Using 2,6‐Disubstituted Isonicotinic Acid Hydrazides.
Authors: Al‐Omar Mohamed A. , Amr Abd El‐Galil E. , Al‐Salahi Rashad A.
Published: March 2011

Starting from 2,6‐disubstituted isonicotinic acid hydrazides (I) or (XV) a series of new heterocyclic compounds is prepared and screened for their anti‐inflammatory, analgesic, anticonvulsant and antiparkinsonian activities.
ChemInform Abstract: 2‐Benzyliden‐2H‐thieto[3,2‐b]quinoline: A New Heterocycle and Its Rearrangement to 2‐Phenylthieno[3,2‐b]quinoline.
Authors: Haddadin Makhluf J. , El‐Nachef Claudia , Kisserwani Hawraa , Chaaban Yara , Kurth Mark J. , Fettinger James C.
Published: March 2011

The first examples of thieto[3,2‐b]quinolines (III) are synthesized and shown to rearrange readily to interesting and rare thienoquinolines (IV).
ChemInform Abstract: The First Example of an Intramolecular Diels—Alder Furan (IMDAF) Reaction of Iminium Salts and Its Application in a Short and Simple Synthesis of the Isoindolo[1,2‐a]isoquinoline Core of the Jamtine and Hirsutine Alkaloids.
Authors: Zubkov Fedor I. , Ershova Julya D. , Zaytsev Vladimir P. , Obushak Mykola D. , Matiychuk Vasyl S. , Sokolova Ekaterina A. , Khrustalev Victor N. , Varlamov Alexey V.
Published: March 2011

N‐Alkylation of isoquinoline derivatives with alkyl halides affords intermediate iminium salts, which undergo unexpected spontaneous intramolecular Diels—Alder reaction to produce cycloadducts with the basic structural core of the title alkaloids.
ChemInform Abstract: Synthesis of β‐Keto Esters In‐Flow and Rapid Access to Substituted Pyrimidines.
Authors: Bartrum Hannah E. , Blakemore David C. , Moody Christopher J. , Hayes Christopher J.
Published: March 2011

A straightforward two‐step method is reported.
ChemInform Abstract: Efficient Synthesis of Thieno[2,3‐d]pyrimidines and Related Fused Systems.
Authors: Aly Aly A. , Behalo Mohamed S.
Published: March 2011

Carboxylate (I) is shown to be a versatile precursor for the synthesis of various novel polyfunctionally substituted thienopyrimidines.
ChemInform Abstract: Synthesis and Activity of Novel Indole Linked Triazole Derivatives as Antifungal Agents.
Authors: Na Young Min
Published: March 2011

Indole derivatives (VI) demonstrate moderate to potent antifungal activity.
ChemInform Abstract: A Hetero‐Diels—Alder Approach to Functionalized 1H‐Tetrazoles: Synthesis of Tetrazolyl‐1,2‐oxazines, ‐oximes and 5‐(1‐Aminoalkyl)‐1H‐tetrazoles.
Authors: Lopes Susana M. M. , Lemos Americo , Pinho e Melo Teresa M. V. D.
Published: March 2011

The first and unprecedented examples of inverse electron demand Diels—Alder reactions of nitrosovinyltetrazole derived from bromooxime (I) with electron‐rich alkenes and some heterocycles are described.
ChemInform Abstract: Chemical Constituents from Aphanamixis grandifolia.
Authors: Liu Quan , Chen Chao‐Jun , Shi Xiang , Zhang Li , Chen Hui‐Juan , Gao Kun
Published: March 2011

Two new cycloartane‐type triterpenoids (I) and (II) are isolated along with two previously unknown compounds (III) and (IV).
ChemInform Abstract: Concurrent Esterification and N‐Acetylation of Amino Acids with Orthoesters: A Useful Reaction with Interesting Mechanistic Implications.
Authors: Gibson Sarah , Romero Dickie , Jacobs Hollie K. , Gopalan Aravamudan S.
Published: March 2011

Triethyl orthoacetate is shown to be an effective reagent for the concomitant one‐pot N‐acetylation and esterification of amino acids under neutral conditions.
ChemInform Abstract: One‐Pot Thioether Formation from S‐Nitrosothiols.
Authors: Zhang Dehui , Devarie‐Baez Nelmi O. , Pan Jia , Wang Hua , Xian Ming
Published: March 2011

Unstable S‐nitrosothiols are selectively converted into stable thioethers what may have the potential to be applied in the detection of protein S‐nitrosation.
ChemInform Abstract: Synthesis and Antitubercular Evaluation of New Bis‐1,2,3‐triazoles Derived from D‐Mannitol.
Authors: de L. Ferreira Marcelle , de Souza Marcus V. N. , Wardell Solange M. S. V. , Wardell James L. , Vasconcelos Thatyana R. A. , Ferreira Vitor F. , Lourenco Maria C. S.
Published: March 2011

Several novel mannitol‐derived bistriazoles (III) are prepared using “click chemistry” and tested for their activity.
ChemInform Abstract: Widely Applicable Deprotection Method of 2,2,2‐Trichloroethoxycarbonyl (Troc) Group Using Tetrabutylammonium Fluoride.
Authors: Huang Cheng‐yuan , Wang Ning , Fujiki Katsumasa , Otsuka Yuji , Akamatsu Masao , Fujimoto Yukari , Fukase Koichi
Published: March 2011

A new method for the removal of the Troc group under mild conditions in a homogeneous reaction is developed.
ChemInform Abstract: Regio‐ and Stereoselective Synthesis of Peracetylated Carbohydrate Esters of Aromatic Fatty Acid Using p‐Toluenesulfonic Acid as Catalyst.
Authors: Zhu Zhenyuan , Li Shengfeng , Liu Rongqiang , Yuan Jing , Wang Haibiao , Zhang Yongmin , Liu Yang
Published: March 2011

The regio‐ and stereoselective synthesis of peracetylated carbohydrate esters of stearic acid of type (VI)/(VII) or (IX)/(X) using p‐toluenesulfonic acid as catalyst is described.
ChemInform Abstract: Ugi‐Type Four‐Component Reaction for a Novel Synthesis of 5‐Oxo‐perhydrofuro[3,2‐b]pyran Carboxylate Derivatives.
Authors: Reddy B. V. Subba , Majumder Nilanjan , Gopal A. V. Hara , Chatterjee Deepak , Kunwar A. C.
Published: March 2011

The reaction involving a sugar hydroxyaldehyde and Meldrum′s acid produces a mixture of polycyclic lactones (V) and the corresponding diesters (VI).