bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of composition and synthesis conditions on microstructure and properties of acrylonitrile‐chlorinated polyethylene‐styrene copolymer
Authors: Wang Jian‐sheng , Ding Yun , Yu Yong , Li Guo‐nai , Sun Fang 
Published: May 2013

ABSTRACTAcrylonitrile‐chlorinated polyethylene‐styrene copolymer (ACS resin) was prepared by a suspension polymerization and the structure of the ACS resin was characterized by IR and SEM. The influence of the chlorinated polyethylene (CPE) content, mass ratio of monomer, reaction temperature, and time on the properties of the ACS resin was investigated. With the increase of the CPE content, the thermal stability of the ACS resin decreased, the flexural strength and modulus increased, whereas the heat distortion temperature, tensile modulus, and impact strength first enhanced, and then decreased. The increase of the mass ratio of Styrene (St) to Acrylonitrile (AN) contributed to an improvement in the elongation at break, but played a negative role in the flexural strength and modulus. Increasing the reaction time and temperature could improve the performances of the ACS resin. The morphology of the ACS resin demonstrated the transformation from a brittle fracture to ductile fracture of the ACS resin with various CPE contents and supported the results of the mechanical properties. The ACS resin with good comprehensive performances could be obtained when the content of the CPE was 30%, the mass ratio of St to AN was 2/1, and the reaction condition was 80°C/3 h, 110°C/3 h, and 130°C/2 h. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2136–2142, 2013
Study of poly(vinyl chloride)/acrylonitrile–styrene–acrylate blends for compatibility, toughness, thermal stability and UV irradiation resistance
Authors: Zhang Yunxiang , Xu Yingjie , Song Yihu , Zheng Qiang 
Published: May 2013

ABSTRACTA novel rigid poly(vinyl chloride) (PVC)/acrylonitrile–styrene–acrylate (ASA) copolymer blend with good ultraviolet (UV) irradiation resistance and toughness was reported. ASA with good weatherability and toughness was mixed with PVC by conical twin‐screw extruder to improve the UV irradiation resistance and toughness of PVC. The blends were characterized using Fourier‐transform infrared spectra, dynamic mechanical analysis, and scanning electron microscope. Notch Charpy impact test was used to characterize the UV radiation induced changes in toughness. The results showed that ASA was able to toughen PVC with simultaneously improving heat resistance, thermal stabilization, and protecting PVC from irradiation photochemical degradation. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2143–2151, 2013
Synthesis and properties of polyacrylamide/hollow coal gangue spheres superabsorbent composites
Authors: Li Yang , Ren Nana , Wang Yanzhong , Huang Jin , Liu Wei , Su Zhenguo , Yang Jinlong 
Published: May 2013

ABSTRACTPolyacrylamide/hollow coal gangue spheres (PAM/HCGS) superabsorbent composites were prepared by in situ aqueous solution polymerization using N,N′‐methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) as an initiator. PAM/HCGS composites exhibit the good water and salt absorption with 5 wt % HCGS, 0.14 wt % crosslinker, and 0.56 wt % initiator. Water retention of PAM/HCGS (5 wt %) retains 43% at 60°C for 24 h, which is much better than that of pure polyacrylamide. It suggests that the addition of HCGS increase the strength of swollen gel. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 2184–2187, 2013
Clinically Insignificant Effect of Supplemental Vitamin C on Serum Urate in Patients With Gout: A Pilot Randomized Controlled Trial
Authors: Stamp Lisa K. , O'Donnell John L. , Frampton Christopher , Drake Jill M. , Zhang Mei , Chapman Peter T. 
Published: May 2013

ObjectiveStudies in human volunteers have shown that vitamin C reduces serum urate (SU) levels. The aim of this study was to determine the effects of vitamin C on SU levels in patients with gout.MethodsPatients with gout and an SU level >0.36 mmoles/liter (6 mg/dl) were recruited. Twenty patients already taking allopurinol were randomized to receive an increase in the dose of allopurinol or to commence taking vitamin C (500 mg/day). Twenty patients who had not been taking allopurinol were randomized to start receiving either allopurinol (up to 100 mg/day) or vitamin C (500 mg/day). Levels of plasma ascorbate, creatinine, and SU were measured on day 0 and week 8.ResultsThere was no significant difference in the baseline SU level or estimated glomerular filtration rate (eGFR) between those who received vitamin C and those who did not (for SU, mean ± SEM 0.50 ± 0.11 mmoles/liter [8.4 ± 1.8 mg/dl] versus 0.50 ± 0.09 mmoles/liter [8.4 ± 1.5 mg/dl]; for eGFR, mean ± SEM 65.5 ± 3.5 ml/minute/1.73 m2 versus 67.9 ± 4.6 ml/minute/1.73 m2). Among the randomized patients, 30% in the vitamin C group and 25% in the no vitamin C control group were receiving diuretics. In the patients receiving vitamin C, there was a significant increase between day 0 and week 8 in the plasma ascorbate level. The reduction in SU level over 8 weeks was significantly less in those patients receiving vitamin C compared to those who started or increased the dose of allopurinol (mean reduction 0.014 mmoles/liter [0.23 mg/dl] versus 0.118 mmoles/liter [1.9 mg/dl]; P < 0.001).ConclusionA modest dosage of vitamin C (500 mg/day) for 8 weeks had no clinically significant urate‐lowering effects in patients with gout, despite the fact that plasma ascorbate levels increased. These results differ from previous findings in healthy control subjects with hyperuricemia. The uricosuric effect of modest‐dose vitamin C appears to be small in patients with gout, when administered as monotherapy or in combination with allopurinol.
The Role of Numeracy and Intelligence in Health‐Risk Estimation and Medical Data Interpretation
Authors: Låg Torstein , Bauger Lars , Lindberg Martin , Friborg Oddgeir 
Published: May 2013

ABSTRACTDespite ample evidence that numeracy is an important influence on patient understanding and use of health‐related information, there is a dearth of studies examining the concept's relationship to other individual differences measures that may underlie complex judgments in the health domain. In this study, we compared the relative contributions of selected extant numeracy measures and general intelligence and other measures to varied judgment and decision‐making outcomes. Two hundred participants completed numeracy items, subscales of the Wechsler Adult Intelligence Scales, the need for cognition scale, and four relevant outcome measures including risk estimation and medical data interpretation. A numeracy scale constructed using item response and confirmatory factor analyses was consistently the strongest predictor across all outcome measures and accounted for unique variance over and above general intelligence. The results support the concept of numeracy as an independent construct that merits consideration in patient communication. Copyright © 2013 John Wiley & Sons, Ltd.
Unraveling Cellulose Microfibrils: A Twisted Tale
Authors: Hadden Jodi A. , French Alfred D. , Woods Robert J. 
Published: May 2013

ABSTRACTMolecular dynamics (MD) simulations of cellulose microfibrils are pertinent to the paper, textile, and biofuels industries for their unique capacity to characterize dynamic behavior and atomic‐level interactions with solvent molecules and cellulase enzymes. While high‐resolution crystallographic data have established a solid basis for computational analysis of cellulose, previous work has demonstrated a tendency for modeled microfibrils to diverge from the linear experimental structure and adopt a twisted conformation. Here, we investigate the dependence of this twisting behavior on computational approximations and establish the theoretical basis for its occurrence. We examine the role of solvent, the effect of nonbonded force field parameters [partial charges and van der Waals (vdW) contributions], and the use of explicitly modeled oxygen lone pairs in both the solute and solvent. Findings suggest that microfibril twisting is favored by vdW interactions, and counteracted by both intrachain hydrogen bonds and solvent effects at the microfibril surface. © 2013 Wiley Periodicals, Inc. Biopolymers 99: 746–756, 2013.
A semantic feature for human motion retrieval
Authors: Qi Tian , Feng Yinfu , Xiao Jun , Zhuang Yueting , Yang Xiaosong , Zhang Jianjun 
Published: May 2013

ABSTRACTWith the explosive growth of motion capture data, it becomes very imperative in animation production to have an efficient search engine to retrieve motions from large motion repository. However, because of the high dimension of data space and complexity of matching methods, most of the existing approaches cannot return the result in real time. This paper proposes a high level semantic feature in a low dimensional space to represent the essential characteristic of different motion classes. On the basis of the statistic training of Gauss Mixture Model, this feature can effectively achieve motion matching on both global clip level and local frame level. Experiment results show that our approach can retrieve similar motions with rankings from large motion database in real‐time and also can make motion annotation automatically on the fly. Copyright © 2013 John Wiley & Sons, Ltd.
Towards polite virtual agents using social reasoning techniques
Authors: Lee JeeHang , Li Tingting , Padget Julian 
Published: May 2013

ABSTRACTThe use of polite agents is a new approach in order to improve efficiency and naturalism in navigation for player characters in crowded virtual worlds. This paper aims to model the politeness of virtual humans using logic‐based approaches, subject to theory of politeness decomposed of conventional and interpersonal politeness. To do so, we propose a high‐level agent architecture combined with normative framework to model and reason about ‘polite’ behaviours in social situations. With this architecture, we demonstrate (i) specifying polite behaviours as a form of social norms; (ii) generating polite behaviours using social reasoning technique; (iii) deliberation with such norms in belief–desire–intention agents; and (iv) realising physical actions based on the decision. Implementation for social reasoning is achieved by InstAL, based on the semantics of answer set programming. Using experiments with simple collision avoidance model, we show the effectiveness of polite behaviour in navigation designed by such architecture, as well as the adequacy of this architecture for modelling theory of politeness in all circumstances. Copyright © 2013 John Wiley & Sons, Ltd.
Substrate‐Dependent Stereospecificity of Tyl‐KR1: An Isolated Polyketide Synthase Ketoreductase Domain from Streptomyces fradiae
Authors: Häckh Matthias , Müller Michael , Lüdeke Steffen 
Published: May 2013

AbstractThe stereospecificity of an enzymatic reaction depends on the way in which a substrate and its enantiomer bind to the active site. These binding modes cannot be easily predicted. We have studied the stereospecificity and stereoselectivity of the ketoreductase domain Tyl‐KR1 of the tylactone polyketide synthase from Streptomyces fradiae by analysing the stereochemical outcome of the reduction of five different keto ester substrates. The absolute configuration of the Tyl‐KR1 reduction products was determined by using vibrational circular dichroism (VCD) spectroscopy combined with quantum chemical calculations. The conversion of only one of the tested substrates, 2‐methyl‐3‐oxovaleric acid N‐acetylcysteamine thioester, afforded the expected anti‐(2R,3R) configuration of the α‐methyl‐β‐hydroxyl ester product, representing the stereochemistry observed for the physiological polyketide product tylactone. For all other substrates, which were modified with respect to the type of ester and/or the chain length (C4 instead of C5), the opposite configuration (anti‐(2S,3S)) was obtained with significant enantio‐ and diastereoselectivity. Inversion of both stereocentres suggests completely different binding modes invoked by only minor modifications of the substrate structure.
ChemInform Abstract: 1:1:1 Triple‐Cation B‐Site‐Ordered and Oxygen‐Deficient Perovskite Ca4GaNbO8: A Member of a Family of Anion‐Vacancy‐Based Cation‐Ordered Complex Perovskites.
Authors: Yang Tao , Claridge John B. , Rosseinsky Matthew J. 
Published: May 2013

AbstractThe new title compound is prepared by solid state reaction of stoichiometric mixtures of CaCO3, Ga2O3, and Nb2O3 (1225 °C, 60 h) and characterized by X‐ray and neutron diffraction.
ChemInform Abstract: Structural Characterization of Magnesium‐Based Compounds Mg9Si5 and Mg4Si3Al (Superconductor) Synthesized under High Pressure and High Temperature Conditions.
Authors: Ji Shidong , Imai Motoharu , Zhu Haikui , Yamanaka Shoji 
Published: May 2013

AbstractThe title compounds are prepared at 900—1100 °C and 5 GPa and characterized by single crystal XRD and magnetic measurements.
ChemInform Abstract: Topochemical Fluorination of Sr3(M0.5Ru0.5)2O7 (M: Ti, Mn, Fe), n = 2, Ruddlesden—Popper Phases.
Authors: Romero Fabio Denis , Bingham Paul A. , Forder Susan D. , Hayward Michael A. 
Published: May 2013

AbstractSr3 (Ti0.5Ru0.5)2O7F2 (I), Sr3 (Mn0.5Ru0.5)2O7F2 (II), and Sr3 (Fe0.5Ru0.5)2O5.5F3.5 (III) are obtained from Sr3(M0.5Ru0.5)2O7 (M: Ti, Mn, Fe) by a solid state topochemical anion insertion/substitution process using CuF2 under flowing O2 (250 °C, 3 times 8 h).
ChemInform Abstract: A Sodium Manganese Ferrocyanide Thin Film for Na‐ion Batteries.
Authors: Matsuda Tomoyuki , Takachi Masamitsu , Moritomo Yutaka 
Published: May 2013

AbstractThe cathode properties of Na1.32Mn [Fe(CN)6]0.83·3.5H2O are investigated using a thin film electrode.
ChemInform Abstract: Reversible Solid State Redox of an Octacyanometallate‐Bridged Coordination Polymer by Electrochemical Ion Insertion/Extraction.
Authors: Okubo Masashi , et al. et al. 
Published: May 2013

Abstract[Mn(H2O)] [Mn(HCOO)2/3(H2O)2/3]3/4 [Mo(CN)8]·H2O is precipitated by addition of an aqueous solution of Cs3[Mo(CN)8] to a HCOOH/H2O (3:1) solution of MnCl2 (92% yield).
ChemInform Abstract: Acentric Polyborate, Li3[B8O12(OH)3], with a New Type of Anionic Layer and Li Atoms in the Cavities.
Authors: Belokoneva Elena L. , Dimitrova Olga V. 
Published: May 2013

AbstractSingle crystals of Li3[B8O12(OH)3] are obtained by hydrothermal synthesis of a mixture with a molar ratio of PbCO3:Bi2O3:LiIO3:B2 O3:SiO2 = 1:1:2:3:1 (autoclave, 270 °C, 71 bar, 18—20 d).
ChemInform Abstract: Triangular {Mn(OH)}36+ Fragment Encapsulated in Trivacant [A‐R‐SiW9O34]10‐ Ligand.
Authors: Zhang Na , Liu Bin , Liu Xue‐Mei , Ding Tuo , Jia Yan‐Yan , Xue Gang‐Lin 
Published: May 2013

AbstractThe new complex (III) displays the [{MnIII(OH) (H2O)}3SiW9O34]4‐ anion, which contains a trilacunary Keggin fragment A‐α‐SiW9O34 encapsulating a triangular {Mn(OH)}35+ ring core, in which hydroxo bridges connect the high‐spin Jahn—Teller distorted MnIII centers with antiferromagnetic coupling.
ChemInform Abstract: Hydrothermal Synthesis, Structure, and Electrochemical Properties of a Three‐Dimensional Vanadium‐Nickel Phosphate (C2H10N2)4 [H2Ni(H2O)2(VO)8 (OH)4(PO4)8]·H2O.
Authors: Yin Fan‐Wen , Peng Cheng‐Dong , Li Ya‐Si , Zhuang Ting‐Ting , Zeng Qing‐Xin , Yuan Zhan‐Hui 
Published: May 2013

AbstractThe title compound is prepared by hydrothermal reaction of an aq.
ChemInform Abstract: Complete Catalytic Deoxygenation of CO2 into Formamide Derivatives.
Authors: Jacquet Olivier , Das Neves Gomes Christophe , Ephritikhine Michel , Cantat Thibault 
Published: May 2013

AbstractThis method yields imidazole and pyrimidine derivatives from 1,2‐ and 1,3‐diamino substrates.
ChemInform Abstract: L‐Pipecolinic Acid Derived Lewis Base Organocatalyst for Asymmetric Reduction of N‐Aryl Imines by Trichlorosilane: Effects of the Side Amide Group on Catalytic Performances.
Authors: Wang Zhouyu , Wang Chao , Zhou Li , Sun Jian 
Published: May 2013

AbstractA novel pipecolinic acid derived catalyst is prepared and successfully applied in the asymmetric reduction of different N‐aryl imines.
ChemInform Abstract: Pd/C‐Mediated Depropargylation of Propargyl Ethers/Amines in Water.
Authors: Rambabu D. , Bhavani S. , Swamy Nalivela Kumara , Rao M. V. Basaveswara , Pal Manojit 
Published: May 2013

AbstractA simple and inexpensive method is presented for the regioselective cleavage of (het)aryl propargyl ethers and amines as an important step in natural product synthesis.
ChemInform Abstract: Copper‐ and Iron‐Catalyzed Decarboxylative Tri‐ and Difluoromethylation of α,β‐Unsaturated Carboxylic Acids with CF3SO2Na and (CF2HSO2)2Zn via a Radical Process.
Authors: Li Zejiang , Cui Zili , Liu Zhong‐Quan 
Published: May 2013

AbstractThe reaction is mentioned to fail with alkyl‐substituted acrylic acids possibly due to the stability of the radical intermediates.
ChemInform Abstract: Manganese(II) Salts as Efficient Catalysts for Chemoselective Transesterification of β‐Keto Esters under Non‐Conventional Conditions.
Authors: Krishnaiah G. , Sandeep B. , Kondhare D. , Rajanna K. C. , Reddy J. Narendar , Rao Y. Rajeshwar , Zhubaidha P. K. 
Published: May 2013

AbstractSince conventional conditions require reaction times of 16‐24h, the transformation of β‐keto ester (I) is investigated under ultrasound or microwave conditions where the latter afford optimal results concerning the time.
ChemInform Abstract: Synthesis of Tetrasubstituted Cyclopentadienes via Palladium‐Catalyzed Reaction of (Z)‐2‐En‐4‐yn Acetates and N‐Methyl Indoles.
Authors: Zhong Mei‐Jin , Wang Xiang‐Chuan , Zhu Hai‐Tao , Hu Jie , Liu Lei , Liu Xue‐Yuan , Liang Yong‐Min 
Published: May 2013

AbstractThe title reaction represents a simple, efficient, and widely applicable method to prepare tetrasubstituted cyclopentadienes.
ChemInform Abstract: Flow Chemistry Syntheses of Styrenes, Unsymmetrical Stilbenes and Branched Aldehydes.
Authors: Bourne Samuel L. , O'Brien Matthew , Kasinathan Sivarajan , Koos Peter , Tolstoy Paeivi , Hu Dennis X. , Bates Roderick W. , Martin Benjamin , Schenkel Berthold , Ley Steven V. 
Published: May 2013

AbstractThe flow reactions for vinylation and hydroformylation can be operated in sequence to yield arylethyl carbaldehydes from aryl iodides.
ChemInform Abstract: Pd‐Catalyzed sp2—sp Cross‐Coupling Reactions Involving C—F Bond Activation in Highly Fluorinated Nitrobenzene Systems.
Authors: Cargill Matthew R. , Sandford Graham , Kilickiran Pinar , Nelles Gabriele 
Published: May 2013

AbstractThe reaction represents the first example of metal‐catalyzed sp2—sp cross‐coupling involving C—F bond activation.
ChemInform Abstract: A Magnetically Separable Gold Catalyst for Chemoselective Reduction of Nitro Compounds.
Authors: Park Sungho , Lee In Su , Park Jaiwook 
Published: May 2013

AbstractA simple and efficient procedure for the chemoselective reduction of a wide range of nitro compounds using a combination of hydrosilane and magnetically separable gold nanoparticles is presented (12 examples).
ChemInform Abstract: An Efficient Transformation of Ethers to N,N′‐Disubstituted Ureas in a Ritter‐type Reaction.
Authors: Panduranga Veladi , Basavaprabhu Basavaprabhu , Sureshbabu Vommina V. 
Published: May 2013

AbstractThe one‐step synthesis of title compounds via BF3·OEt2‐catalyzed cleavage of ethers and subsequent Ritter reaction with cyanamides provides an excellent alternative to existing protocols due to its operational simplicity.
ChemInform Abstract: Palladium Complexes Containing Multidentate Phenoxy—Pyridyl—Amidate Ligands: Highly Efficient Catalyst for Heck Coupling of Deactivated Aryl Halides.
Authors: Kantam M. Lakshmi , Annapurna Manne , Likhar Pravin R. , Srinivas P. , Mirzadeh Nedaossadat , Bhargava Suresh K. 
Published: May 2013

AbstractNovel tetrafunctional Pd(II) complexes, prepared from amino acids, are shown to be highly efficient catalysts for the Heck reaction of deactivated aryl bromides and iodides with high turnover numbers.
ChemInform Abstract: A Novel Consecutive Reaction of Lithium Acetylides with 2‐Aryl‐1‐chlorovinyl p‐Tolyl Sulfoxides Leading to the Formation of (Z)‐Enediynes.
Authors: Kimura Tsutomu , Nishimura Yuka , Ishida Naoyuki , Momochi Hitoshi , Yamashita Hironori , Satoh Tsuyoshi 
Published: May 2013

AbstractIn contrast to previous reports concerning alkyl‐substituted sulfoxides, the reactions of aryl‐substituted substrates with lithium acetylides produce (Z)‐enediynes instead of the expected conjugated enynes.
ChemInform Abstract: Chemoselective Allene Aziridination via Ag(I) Catalysis.
Authors: Rigoli Jared W. , Weatherly Cale D. , Vo Brian T. , Neale Samuel , Meis Alan R. , Schomaker Jennifer M. 
Published: May 2013

AbstractIt is demonstrated that scope and utility of allene aziridination can be greatly increased by employing readily available and tunable Ag(I)‐based catalysts.
ChemInform Abstract: Phosphonitrilic Chloride as an Efficient Reagent for the Synthesis of β‐Sultams.
Authors: Zarei Maaroof 
Published: May 2013

AbstractOptimized conditions for the synthesis of β‐sultams, which are of interest in antibiotic research, from imines and sulfonic acid allow simple aqueous work‐up to remove water‐soluble by‐products.
ChemInform Abstract: A Versatile and Practical Method for Regioselective Synthesis of Polysubstituted Furanonaphthoquinones.
Authors: Wu Zong‐Ze , Jang Yeong‐Jiunn , Lee Chia‐Jui , Lee Yen‐Te , Lin Wenwei 
Published: May 2013

AbstractOptimal reaction conditions are established for the three‐component reaction of naphthoquinone (I) with aryl aldehydes (II) and tributylphosphine.
ChemInform Abstract: Selectivity Control by Silver Catalysts in the Cycloisomerization of 1,6‐Enynes Derived from Propiolamides.
Authors: Koo Jaeyoung , Park Hyun‐Sub , Shin Seunghoon 
Published: May 2013

AbstractAg(I)‐catalyzed title reactions result in selective formation of Alder‐ene type 1,4‐dienes.
ChemInform Abstract: Zn‐Mediated Asymmetric Allylation of N‐tert‐Butanesulfinyl Ketimines: An Efficient and Practical Access to Chiral Quaternary 3‐Aminooxindoles.
Authors: Chen Diao , Xu Ming‐Hua 
Published: May 2013

AbstractThis method provides an easy and highly diastereoselective access to a wide range of 3‐allyl or 3‐propargyl substituted 3‐aminooxindoles under exceptionally mild conditions.
ChemInform Abstract: Facile Synthesis of Diverse Isoindolinone Derivatives via Ugi‐4CR Followed by Cu‐Catalyzed Deamidative C(sp2)—C(sp3) Coupling.
Authors: Tyagi Vikas , Khan Shahnawaz , Chauhan Prem M. S. 
Published: May 2013

AbstractThe two‐step procedure renders possible the access to medicinally interesting structures.
ChemInform Abstract: Synthesis of 5‐Arylamino‐1‐arylpyrazoles from 5‐Aminopyrazoles with Arylhalides via CuI Catalyzed Ullman Coupling Reaction.
Authors: Chang En‐Chiuan , Chen Chun‐Yen , Wang Li‐Ya , Huang Yu‐Ying , Yeh Mou‐Yung , Wong Fung Fuh 
Published: May 2013

AbstractIn some cases aryl bromides are used as starting material giving similar results.
ChemInform Abstract: Schwartz Reagent Mediated Synthesis of Thiazolones and Imidazolones from Thiazolidine‐2,4‐diones and Imidazolidine‐2,4‐diones.
Authors: Dandepally Srinivasa Reddy , Elgoummadi Radouane , Williams Alfred L. 
Published: May 2013

AbstractThe novel reduction/elimination sequence allows the conversion of substrates of type (I) and (III) in a single step.
ChemInform Abstract: Pd(II)‐Catalyzed Regio‐, Enantio‐, and Diastereoselective 1,4‐Addition of Azlactones Formed in situ from Racemic Unprotected Amino Acids and Acetic Anhydride.
Authors: Weber Manuel , Peters Rene 
Published: May 2013

AbstractCatalyst (I) efficiently promotes the regio‐, enantio‐, and diastereoselective 1,4‐addition of azlactones [cf.
ChemInform Abstract: Oxidative Difunctionalization of 2‐Amino‐4H‐pyrans in Iodobenzene Diacetate and N‐Chlorosuccinimide: Reactivity, Mechanistic Insights, and DFT Calculations.
Authors: Mandha Santhosh Reddy , Alla Manjula , Bommena Vittal Rao , Nanubolu Jagadeesh Babu , Lingala Santosh Kumar , Yarasi Soujanya 
Published: May 2013

AbstractIn the presence of PhI(O‐Ac)2 and simple alcohols, 2‐aminopyrans undergo unusual geminal dialkoxylation with 1,2‐migration of the amino group.