bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic Resonance Imaging and Sonography in the Diagnosis of Placental Invasion
Authors: Balcacer Patricia , Pahade Jay , Spektor Michael , Staib Lawrence , Copel Joshua A. , McCarthy Shirley 
Published: May 2016

ObjectivesTo compare older and newer magnetic resonance imaging (MRI) criteria for placental invasion and to compare the sensitivity, specificity, and accuracy of MRI and sonography in determining the depth of placental invasion.MethodsForty pregnant patients at high risk for morbidly adherent placenta based on prenatal sonography underwent MRI evaluations. Two reviewers, who were blinded to the original MRI and sonographic interpretations, clinical history, and obstetric/pathologic findings, reviewed the MRI examinations. The MRI and sonographic scans were analyzed for the presence and depth of invasion. The MRI scans were tabulated for the presence of dark intraplacental T2 bands, bulging of the myometrium, increased vascularity, and indistinct myometrium, loss of the dark T2 myometrial/placental interface, and a thin myometrium. The obstetric/pathologic results served as the reference standards.ResultsEighteen of 40 patients had a morbidly invasive placenta. The sensitivity, specificity, and accuracy of MRI and sonography were not significantly different. The accuracy rates for determining the depth of placental invasion by readers 1 and 2 were 0.65 and 0.55, respectively (P > .05). According to the Cohen κ statistic, there was a good inter‐reader agreement between the MRI readers in assessing the depth of placental invasion (κ = 0.45). The features most commonly seen were dark T2 bands, bulging of the uterus, and loss of the dark T2 interface, which were all associated with the presence of placental invasion.ConclusionsThe diagnosis of placental invasion remains challenging on sonography and MRI, which perform similarly. The presence of 2 or more criteria adds specificity to the diagnosis of placental invasion on MRI.
The source of O+ in the storm time ring current
Authors: Kistler L. M. , Mouikis C. G. , Spence H. E. , Menz A. M. , Skoug R. M. , Funsten H. O. , Larsen B. A. , Mitchell D. G. , Gkioulidou M. , Wygant J. R. , Lanzerotti L. J. 
Published: May 2016

AbstractA stretched and compressed geomagnetic field occurred during the main phase of a geomagnetic storm on 1 June 2013. During the storm the Van Allen Probes spacecraft made measurements of the plasma sheet boundary layer and observed large fluxes of O+ ions streaming up the field line from the nightside auroral region. Prior to the storm main phase there was an increase in the hot (>1 keV) and more isotropic O+ ions in the plasma sheet. In the spacecraft inbound pass through the ring current region during the storm main phase, the H+ and O+ ions were significantly enhanced. We show that this enhanced inner magnetosphere ring current population is due to the inward adiabatic convection of the plasma sheet ion population. The energy range of the O+ ion plasma sheet that impacts the ring current most is found to be from ~5 to 60 keV. This is in the energy range of the hot population that increased prior to the start of the storm main phase, and the ion fluxes in this energy range only increase slightly during the extended outflow time interval. Thus, the auroral outflow does not have a significant impact on the ring current during the main phase. The auroral outflow is transported to the inner magnetosphere but does not reach high enough energies to affect the energy density. We conclude that the more energetic O+ that entered the plasma sheet prior to the main phase and that dominates the ring current is likely from the cusp.
Arctic sea surface height variability and change from satellite radar altimetry and GRACE, 2003–2014
Authors: Armitage Thomas W. K. , Bacon Sheldon , Ridout Andy L. , Thomas Sam F. , Aksenov Yevgeny , Wingham Duncan J. 
Published: May 2016

AbstractArctic sea surface height (SSH) is poorly observed by radar altimeters due to the poor coverage of the polar oceans provided by conventional altimeter missions and because large areas are perpetually covered by sea ice, requiring specialized data processing. We utilize SSH estimates from both the ice‐covered and ice‐free ocean to present monthly estimates of Arctic Dynamic Ocean Topography (DOT) from radar altimetry south of 81.5°N and combine this with GRACE ocean mass to estimate steric height. Our SSH and steric height estimates show good agreement with tide gauge records and geopotential height derived from Ice‐Tethered Profilers. The large seasonal cycle of Arctic SSH (amplitude ∼5 cm) is dominated by seasonal steric height variation associated with seasonal freshwater fluxes, and peaks in October–November. Overall, the annual mean steric height increased by 2.2 ± 1.4 cm between 2003 and 2012 before falling to circa 2003 levels between 2012 and 2014 due to large reductions on the Siberian shelf seas. The total secular change in SSH between 2003 and 2014 is then dominated by a 2.1 ± 0.7 cm increase in ocean mass. We estimate that by 2010, the Beaufort Gyre had accumulated 4600 km3 of freshwater relative to the 2003–2006 mean. Doming of Arctic DOT in the Beaufort Sea is revealed by Empirical Orthogonal Function analysis to be concurrent with regional reductions in the Siberian Arctic. We estimate that the Siberian shelf seas lost ∼180 km3 of freshwater between 2003 and 2014, associated with an increase in annual mean salinity of 0.15 psu yr−1. Finally, ocean storage flux estimates from altimetry agree well with high‐resolution model results, demonstrating the potential for altimetry to elucidate the Arctic hydrological cycle.
How quickly, how deeply, and how strongly can dynamical outer boundary conditions impact Van Allen radiation belt morphology?
Authors: Mann Ian R. , Ozeke Louis G. 
Published: May 2016

AbstractHere we examine the speed, strength, and depth of the coupling between dynamical variations of ultrarelativistic electron flux at the outer boundary and that in the heart of the outer radiation belt. Using ULF wave radial diffusion as an exemplar, we show how changing boundary conditions can completely change belt morphology even under conditions of identical wave power. In the case of ULF wave radial diffusion, the temporal dynamics of a new source population or a sink of electron flux at the outer plasma sheet boundary can generate a completely opposite response which reaches deep into the belt under identical ULF wave conditions. Very significantly, here we show that such coupling can occur on timescales much faster than previously thought. We show that even on timescales ~1 h, changes in the outer boundary electron population can dramatically alter the radiation belt flux in the heart of the belt. Importantly, these flux changes can at times occur on timescales much faster than the L shell revisit time obtained from elliptically orbiting satellites such as the Van Allen Probes. We underline the importance of such boundary condition effects when seeking to identify the physical processes which explain the dominant behavior of the Van Allen belts. Overall, we argue in general that the importance of temporal changes in the boundary conditions is sometimes overlooked in comparison to the pursuit of (ever) increasingly accurate estimates of wave power and other wave properties used in empirical representations of wave transport and diffusion rates.
Energetic electron precipitation into the middle atmosphere—Constructing the loss cone fluxes from MEPED POES
Authors: Nesse Tyssøy H. , Sandanger M. I. , Ødegaard L.‐K. G. , Stadsnes J. , Aasnes A. , Zawedde A. E. 
Published: May 2016

AbstractThe impact of energetic electron precipitation (EEP) on the chemistry of the middle atmosphere (50–90 km) is still an outstanding question as accurate quantification of EEP is lacking due to instrumental challenges and insufficient pitch angle coverage of current particle detectors. The Medium Energy Proton and Electron Detectors (MEPED) instrument on board the NOAA/Polar Orbiting Environmental Satellites (POES) and MetOp spacecraft has two sets of electron and proton telescopes pointing close to zenith (0°) and in the horizontal plane (90°). Using measurements from either the 0° or 90° telescope will underestimate or overestimate the bounce loss cone flux, respectively, as the energetic electron fluxes are often strongly anisotropic with decreasing fluxes toward the center of the loss cone. By combining the measurements from both telescopes with electron pitch angle distributions from theory of wave‐particle interactions in the magnetosphere, a complete bounce loss cone flux is constructed for each of the electron energy channels >50 keV, >100 keV, and >300 keV. We apply a correction method to remove proton contamination in the electron counts. We also account for the relativistic (>1000 keV) electrons contaminating the proton detector at subauroral latitudes. This gives us full range coverage of electron energies that will be deposited in the middle atmosphere. Finally, we demonstrate the method's applicability on strongly anisotropic pitch angle distributions during a weak geomagnetic storm in February 2008. We compare the electron fluxes and subsequent energy deposition estimates to OH observations from the Microwave Limb Sounder on the Aura satellite substantiating that the estimated fluxes are representative for the true precipitating fluxes impacting the atmosphere.
Elimination Reactions of (E)‐2,4,6‐Trinitrobenzaldehyde O‐Benzoyloximes Promoted by R2NH/R2NH2+ in 70 mol% MeCN (aq). Effects of the β‐Aryl Group and Leaving Group on Nitrile‐Forming Transition States
Authors: Pyun Sang Yong , Paik Kyu Cheol , Han Man So , Cho Bong Rae 
Published: May 2016

Elimination reactions of (E)‐2,4,6‐(NO2
)
3C6H2CHNOC(O)C6H4X (3) promoted by R2NH/R2NH2

+ in 70 mol% MeCN (aq) have been studied. The reactions produced elimination products and exhibited second‐order kinetics. The β and |βlg| values remained nearly the same for all leaving groups and bases. The results can be described by the negligible pxy
interaction coefficient, pxy
= ∂β/∂pK
lg = ∂βlg/∂pK
BH ≈ 0, which provides a strong support for the (E1cb)irr mechanism. For eliminations from (E)‐ArCHNOC(O)C6H4X (1, 3) and (E)‐2,4,6‐(NO2)3C6H2CHNOAr′ (2, 3), the change of the β‐aryl group (Ar) from 2,4‐dinitrophenyl (1) to 2,4,6‐trinitrophenyl (3) increased the rate by 270‐fold without appreciable change in the transition state structure. On the other hand, the leaving group (OAr′) variation from benzoate (3) to 4‐nitrophenoxy (2) induced a change in reaction mechanism from (E1cb)irr to E2. These results have been attributed to the cyclic transition state for the nitrile‐forming eliminations involving the benzoate leaving group.
ChemInform Abstract: Kinetics of Oxidation on Differently Treated GaAs(100) Surfaces Studied by XPS and STM.
Authors: RICHTER R. , HARTNAGEL H. L. 
Published: May 2016

AbstractThe influence of etching in alkaline NH4OH solution, photochemical etching, and sulfur passivation in (NH4)2S solution on the oxidation behavior, surface stability in air, and electrical homogeneity of GaAs is studied.
ChemInform Abstract: Characterization of Catalysts Derived from Oxidation of RuxThy Intermetallics
Authors: HUANG C.‐S. , HOUALLA M. , HERCULES D. M. , KIBBY C. L. , PETRAKIS L. 
Published: May 2016

Abstractis performed by means of XRD, ESCA, ion scattering spectroscopy (ISS), BET surface area measurements, H2/CO chemisorption, and gravimetric analysis.
ChemInform Abstract: A Study of Rearrangement of Some 1,3‐Dimethoxyalkan‐2‐ones.
Authors: YU Y. , CHEN G. , ZHU J. , ZHANG X. , CHEN S. , TANG H. , ZHANG P. 
Published: May 2016

AbstractDialkoxyacetone derivatives, e.g. (Ia), (III) rearrange to form 2‐oxoaldehyde acetals, e.g. (IIa), (IV).
ChemInform Abstract: Unusual Behavior of 3,4:10,11‐Bis(2′,3′‐quinolino)tricyclo(6.3.0.02,6)undecane Upon Attempted Monoprotonation with Triflic Acid.
Authors: MARCHAND A. P. , ANNAPURNA P. , TAYLOR R. W. , SIMMONS D. L. , WATSON W. H. , NAGL A. , FLIPPEN‐ANDERSON J. L. , GILARDI R. , GEORGE C. 
Published: May 2016

AbstractThe title compound (IIIa) (space group P1 with Z=4) and its methoxy derivative (IIIb) are prepared by Friedlaender condensation.
ChemInform Abstract: Silylation of the Allylphosphonate Anion.
Authors: KOLODYAZHNYI O. I. , USTENKO S. N. 
Published: May 2016

AbstractTreatment of the allylphosphonate (I) with lithium hexamethyldisilazide leads to the formation of allylphosphonate anions which are coupled in situ with trimethylchlorosilane (II) to give the 3‐trimethylsilyl‐1‐propenylphosphonate (III).
ChemInform Abstract: 2‐Oxotetrahydro‐1,3‐oxazine: A Useful Intermediate for the Preparation of Tetrahydropyridine, Indolizidine, and Quinolizidine Skeletons.
Authors: KURIHARA T. , MATSUBARA Y. , OSAKI H. , HARUSAWA S. , YONEDA R. 
Published: May 2016

AbstractThe heterocyclic acetates (I) undergo aldol condensation reaction with acrolein (II) to produce the unsaturated alcohols (III) which form a mixture of the mesylates (V) and the fused oxazinones (VI) upon treatment with mesyl chloride (IV).
ChemInform Abstract: Comparative SO2 Infrared Spectra: Type I and II Clathrate Hydrate Films, Large Gas‐Phase Clusters, and Anhydrous Crystalline Films.
Authors: FLEYFEL F. , RICHARDSON H. H. , DEVLIN J. P. 
Published: May 2016

AbstractThe formation of large gas‐phase clusters formed from anhydrous SO2 and H2O‐SO2 mixtures with a ratio appropriate for clathrate hydrate formation is studied spectroscopically at ∼120 K. Comparison with new thin‐film IR data for the simple type I SO2 hydrate, the mixed SO2‐ethylene oxide type I hydrate and the type II double hydrate with THF shows that, during formation of large ice clusters, SO2 does not enclathrate with the ease and rapidity that has been observed for the small ether molecules.
ChemInform Abstract: Electronic Interactions in Bimetallic Systems: An X‐Ray Photoelectron Spectroscopic Study.
Authors: RODRIGUEZ J. A. , CAMPBELL R. A. , GOODMAN D. W. 
Published: May 2016

AbstractThe electronic interactions in Cu/Rh(100), Cu/Ru(0001), Ni/Ru(0001), Ni/W(110), and Pd/W(110) are investigated by XPS.
ChemInform Abstract: Oxidation of Alcohols with Electrolytic Manganese Dioxide. Its Application for the Synthesis of Insect Pheromones.
Authors: TSUBOI S. , ISHII N. , SAKAI T. , TARI I. , UTAKA M. 
Published: May 2016

AbstractOxidation of allylic and benzyl alcohols with electrolytic MnO2 represents a new economical method for the preparation of ketones and aldehydes.
ChemInform Abstract: Synthesis and X‐Ray Crystal Structure of a Tricyclic Lead‐Nitrogen‐Boron Heterocycle.
Authors: HEINE A. , FEST D. , STALKE D. , HABBEN C. D. , MELLER A. , SHELDRICK G. M. 
Published: May 2016

AbstractTreatment of bis(tert‐butylamino)phenylborane (I) with butyllithium and subsequent reaction with PbCl2 (II) lead to the formation of the tetraazadiplumbadiboratricyclooctanediiumdiide (III) which undergoes sublimation at 175°C, but decomposes in chlorinated solvents.
ChemInform Abstract: Coordination Chemistry of cis‐Trioxotungsten(VI) Complexes. Crystal Structures of LWO3·3 H2O, (L′WO2(OH))Br, (LWO2Br)Br, (L2W2O5)(S2O6)·4 H2O and (LWO2(μ‐O)WO(O2)2(OH2)) (L: 1,4,7‐Triazacyclononane; L′: 1,4,7‐Trimethyl‐1,4,7‐triazacyclononane).
Authors: SCHREIBER P. , WIEGHARDT K. , NUBER B. , WEISS J. 
Published: May 2016

AbstractThe WO3(triamine) complex (I) (space group P21/c, Z=4) is obtained by treating WO3 in aqueous solution with the triamine.
ChemInform Abstract: Facile Synthesis of L‐5‐Fluorolysine from L‐Homoserine.
Authors: ZHENG G. , YOSHIHARA K. , KOBAYASHI Y. , TAGUCHI T. 
Published: May 2016

AbstractFluorinated amino acids, e.g. the title compound (VII), are used for 19F NMR studies of enzymes, receptors and peptides.
ChemInform Abstract: Analysis for Corrosion Behavior of Mild Steels in Various Hydroxy Acid Solutions by New Methods of Surface Analyses and Electrochemical Measurements.
Authors: SEKINE I. , HAYAKAWA T. , NEGISHI T. , YUASA M. 
Published: May 2016

AbstractThe corrosion rate of mild steel in aqueous 30 wt.% hydroxy acid solutions is found to decrease in the order malic acid > tartaric > lactic > citric > glycolic acid.
ChemInform Abstract: Silicon Functionalized Silyl Enol Ethers. Part 3. An α‐Alkylation/Reduction of Ketones via Radical Cyclizations of β‐Chloroethylsilyl Enol Ethers.
Authors: WALKUP R. D. , KANE R. R. , OBEYESEKERE N. U. 
Published: May 2016

AbstractThe methyl ketones (I) are coupled with 2‐(chloroethyl)dimethylsilyl chlorides (II) and subsequently reduced with tributylstannane to form mixtures of the cyclic ethers (II) and the acyclic vinyloxysilanes (IV).
ChemInform Abstract: Cyclopalladation of 5‐(1‐Hexyl)‐2((4′‐(1‐undecyloxy)phenyl))pyrimidine. Synthesis and Characterization of Mononuclear Complexes.
Authors: GHEDINI M. , PUCCI D. 
Published: May 2016

AbstractThe chloro‐bridged Pd complex (I) is prepared in 92% yield from PdCl2(NCPh)2 and 2‐(4'‐undecyloxyphenyl)‐5‐hexylpyrimidine.
ChemInform Abstract: Pigments of Fungi. Part 15. An Efficient, Unambiguous Route to Unsymmetrically Substituted Dibenzyl Acyloins and Their Use in the Synthesis of Fungus Pigments of the Pulvinone and Grevillin Types.
Authors: GILL M. , KIEFEL M. J. , LALLY D. A. , TEN A. 
Published: May 2016

AbstractDibenzyl acyloins such as (III) including those bearing unsymmetrically disposed aryl residues are assembled in high yield by reaction between the silyl ethers (I) of arylacetaldehyde cyanohydrins and the Grignard reagents (II).
ChemInform Abstract: Nucleosides. Part 152. 2′‐Azido‐2′,3′‐dideoxy Pyrimidine Nucleosides. Synthesis and Antiviral Activity Against Human Immunodeficiency Virus.
Authors: WARSHAW J. A. , WATANABE K. A. 
Published: May 2016

AbstractThe benzoyluridines (I) are dehydrated by reaction with diphenyl carbonate to form the 2,2'‐anhydro derivatives (II).
ChemInform Abstract: Phase Relations in the System Cu‐Mo‐S
Authors: HUANG D. , CHANG L. L. Y. , KNOWLES C. R. 
Published: May 2016

Abstractare studied in the temp. range 500‐1000 °C. The chevrel‐type phase CuxMo3S4 is stable above 600 °C and is present in equilibrium with the cubic Cu2S solid solution, Cu, Mo, Mo2S3, and MoS2.
ChemInform Abstract: Synthesis and Structural Characterization of LnPS4 (Ln: Y, Gd, Tb, and Yb).
Authors: LE ROLLAND B. , MCMILLAN P. , MOLINIE P. , COLOMBET P. 
Published: May 2016

AbstractThe title compounds are prepared by reaction of the corresponding lanthanoid sulfides with elemental sulfur and phosphorus (evacuated silica tube, 900 °C, 14 d).
ChemInform Abstract: Gold‐Boron Chemistry. Part 3. The Synthesis, Characterization, and Molecular Structure of ((H11C6)3PAu)2B8H10. Comments on the “Anomalous” Structure of B8H12.
Authors: WYND A. J. , WELCH A. J. 
Published: May 2016

AbstractThe title compound (III) crystallizes in space group C2/c with Z=4.
ChemInform Abstract: Some Newer Aspects of Clemmensen Reduction of Aromatic Ketones.
Authors: TALAPATRA S. K. , CHAKRABARTI S. , MALLIK A. K. , TALAPATRA B. 
Published: May 2016

AbstractThe compounds (IV), (VIII), (XIII) are obtained as a new type of products in Clemmensen reduction of the carbonyl compounds (I), (V), (IX), respectively.
ChemInform Abstract: Studies on Phosphonium Ylides. Part 12. The Reaction of Stable Phosphoranes with Hexahydro‐1,3‐phthalandione.
Authors: BOULOS L. S. , SHABANA R. 
Published: May 2016

AbstractCompound (II) reacts with Wittig reagents (I) and (V) yielding the new adducts (III), (IV), (VI) and (VII).
ChemInform Abstract: Nickel‐Catalyzed Cyclodimerization of Hexapentaenes: (4)Radialenes and (5)Radialenones with Cumulated Double Bonds.
Authors: IYODA M. , KUWATANI Y. , ODA M. , KAI Y. , KANEHISA N. , KASAI N. 
Published: May 2016

AbstractThe starting compounds (I) and (V) are prepared in five‐step syntheses with yields of ∼90% in every step.
ChemInform Abstract: Highly Efficient Alkene‐Alkene and Arene‐Alkene Coupling Reactions with Vicinal Dibromides.
Authors: LANSKY A. , REISER O. , DE MEIJERE A. 
Published: May 2016

AbstractPd(II)‐catalyzed coupling reaction of the 1,2‐dibromo(cyclo)alkenes (I) with methyl acrylate (IIa) or styrene (IIb) yields the trienes (III).
ChemInform Abstract: Unprecedented Ring Cleavage in the Reaction of 1‐Methyl‐3‐phenacylbenzimidazolium Ylide with Diethyl Azodicarboxylate.
Authors: SEPULVEDA‐ARQUES J. , ROMERO ARBIOL E. , GONZALEZ ROSENDE M. E. , LOPEZ‐RODRIGUEZ M. , PEREZ AFONSO R. 
Published: May 2016

AbstractThe title ylide, derived from the compound (IV), reacts differently compared to the ylides prepared from the compounds (I).
ChemInform Abstract: New and Efficient Conversion of Benzoic Acids into Salicylic Acids via Copper‐Mediated Hydroxylation Process.
Authors: REINAUD O. , CAPDEVIELLE P. , MAUMY M. 
Published: May 2016

AbstractThe condensation of the aroyl chlorides (I) with 2‐methylalanine (II) gives the amides (III) which are subjected to an ortho‐hydroxylation process using the system O2/triethylamine N‐oxide/Cu(0) to produce the salicylamides (IV).
ChemInform Abstract: The Chemistry of Vicinal Tricarbonyls. Formation of Carbazole Derivatives.
Authors: WASSERMAN H. H. , VAN DUZER J. H. , VU C. B. 
Published: May 2016

AbstractThe indole‐3‐carboxylate (I) reacts with allyl bromide (II) to produce the N‐allylindolecarboxylate (III) which is coupled with the ester enolate (IV) to form the β‐keto ester (V).
ChemInform Abstract: Chlorination of 1,5‐Dimethylpyrazole.
Authors: PEREVALOV V. P. , MANAEV YU. A. , BEZBORODOV B. V. , STEPANOV B. I. 
Published: May 2016

AbstractThe title reaction proceeds with low selectivity, producing the chlorinated pyrazoles (III) ‐ (VIII) and the diacetoxymethylpyrazole (IX).
ChemInform Abstract: 3,5‐Diphenyl‐1H‐pyrazole Derivatives. Part 4. N,N‐Disubstituted 3‐(3,5‐Diphenyl‐1H‐pyrazol‐1‐yl)propanamides and 3‐(3,5‐Diphenyl‐1H‐pyrazol‐1‐yl)propanamines with Sedative, Platelet Antiaggregating, and Local Anesthetic Activities.
Authors: BONDAVALLI F. , BRUNO O. , RANISE A. , SCHENONE P. , LOSASSO C. , DONNOLI D. , STELLA L. , MARMO E. 
Published: May 2016

AbstractStarting with 3‐(3,5‐diphenyl‐1H‐pyrazol‐1‐yl)propanoic acid (I), the title compounds (III) and (IV) are synthesized by convenient methods.
ChemInform Abstract: Geminal Azo‐ and Heteroelement Functions. Part 8. Triazolium Salts. Part 2. Derivatives of 4,5‐Dihydro‐5,5‐dimethyl‐1,2,4‐triazol‐3‐one.
Authors: SCHANTL J. G. , LANZNASTER N. , GSTACH H. 
Published: May 2016

AbstractAcylation of 4,5‐dihydro‐5,5‐dimethyl‐1,2,4‐triazol‐3‐one (I) with chloroacetyl chloride (II) or the aromatic sulfonyl chlorides (IV) in the presence of pyridines yields the carboxamide (III) or the sulfonamides (V).
ChemInform Abstract: Synthesis of 2‐Aminoindoles from Tetrahydroquinoline N‐Acylamino Derivatives.
Authors: SHORINA N. V. , GOLUBEVA G. A. , SVIRIDOVA L. A. , TOROCHESHNIKOV V. N. 
Published: May 2016

AbstractTreatment of the 1‐acylaminotetrahydroquinolines (I) with phosphorus oxychloride gives the 2‐iminopyrrolo(3,2,1‐ij)quinoline hydrochlorides (II).
ChemInform Abstract: Factors Affecting Cyclisation of N‐Substituted 2‐Acetylamino‐3,5‐dibromobenzamide to 2,3‐Disubstituted 6,8‐Dibromoquinazolin‐4‐ones.
Authors: ISMAIL M. F. , EMARA S. A. , ENAYAT E. I. , MUSTAFA O. E. A. 
Published: May 2016

AbstractFactors which affect the cyclisation of the benzamides (I) to give the quinazolinones (II) are studied.
ChemInform Abstract: Nucleosides. Part 21. Synthesis of 1/2‐Substituted‐4‐amino/hydroxy‐6‐methylthio‐1H/2H‐pyrazolo(3,4‐d)pyrimidines as Analogs of Allopurinol and Their Antileishmanial Activity.
Authors: GARG N. , AVASTHI K. , PRATAP R. , BHAKUNI D. S. , GURU P. Y. 
Published: May 2016

AbstractThe title compounds (II), (IV), (VI) and (VII), which may be regarded as non‐classical nucleosides, are tested for their activity against Leishmania donovani.
ChemInform Abstract: 2‐Phenyl‐6(7)‐R‐Substituted Quinoxaline N‐Oxides. Synthesis, Structure Elucidation and Antimicrobial Activity.
Authors: LORIGA M. , NUVOLE A. , PAGLIETTI G. , FADDA G. , ZANETTI S. 
Published: May 2016

AbstractThe previously synthesized quinoxalines, e.g. (I) and (III), are transformed to their N‐oxides (II) and (IV), resp., and the antimicrobial activity of the latter is investigated.