bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Direct Ethoxycarbonyldifluoromethylation of Aromatic Compounds Using Fenton Reagent.
Authors: Ohtsuka Yuhki , Yamakawa Tetsu 
Published: June 2011

AbstractVarious five‐membered heteroaromatic compounds, uracils, and benzene derivatives such as (III) or (V) having an ethoxycarbonyldifluoromethyl group are prepared using the title reaction.
ChemInform Abstract: New Synthetic Routes for N‐Substituted 1,n‐Diamines. Part 2. Synthesis of Selectively N‐Substituted Tetra‐ and Pentamethylenediamines from ω‐Alkanoic Acid Derivatives.
Authors: Ramirez Maria A. , Corona Maria V. , Ortiz Gisela , Salerno Alejandra , Perillo Isabel A. , Blanco Maria M. 
Published: June 2011

AbstractA novel convenient process for the synthesis of unsymmetrical α,ω‐diamines is developed.
ChemInform Abstract: Flow Synthesis of Organic Azides and the Multistep Synthesis of Imines and Amines Using a New Monolithic Triphenylphosphine Reagent.
Authors: Smith Catherine J. , Smith Christopher D. , Nikbin Nikzad , Ley Steven V. , Baxendale Ian R. 
Published: June 2011

AbstractAn improved process for flow synthesis of aryl and alkyl azides is reported.
ChemInform Abstract: A Nanoporous Metal—Organic Framework with Accessible Cu2+ Sites for the Catalytic Henry Reaction.
Authors: Shi Lian‐Xu , Wu Chuan‐De 
Published: June 2011

AbstractA novel 3D porous metal‐organic framework containing 1D nanoscale opening channels is constructed from two kinds of pyridine carboxylates and Cu(II) nodes with reachable Cu sites located in the channel walls.
ChemInform Abstract: Direct Enantioselective Aldol—Tishchenko Reaction Catalyzed by Chiral Lithium Diphenylbinaphtholate.
Authors: Ichibakase Tomonori , Nakajima Makoto 
Published: June 2011

AbstractChiral lithium catalyst is effective in the aldol—Tishchenko, aldol—aldol—Tishchenko and Evans—Tishchenko reactions to afford the products with high yields and enantioselectivities.
ChemInform Abstract: N‐(Heteroarenesulfonyl)prolinamides‐Catalyzed Aldol Reaction Between Acetone and Aryl Trihalomethyl Ketones.
Authors: Hara Noriyuki , Tamura Ryota , Funahashi Yasuhiro , Nakamura Shuichi 
Published: June 2011

AbstractKetone substrates and ketimine (VIII) are easily transformed to chiral alcohols products with one quaternary carbon center.
ChemInform Abstract: Well‐Defined Air‐Stable Palladium HASPO Complexes for Efficient Kumada—Corriu Cross‐Couplings of (Hetero)Aryl or Alkenyl Tosylates.
Authors: Ackermann Lutz , Kapdi Anant R. , Fenner Sabine , Kornhaass Christoph , Schulzke Carola 
Published: June 2011

AbstractThe new palladium complexes (I) and (II) are used as highly efficient catalysts for the title process under mild conditions and at low loadings.
ChemInform Abstract: Nickel‐Catalyzed Cross‐Coupling of Aryl Phosphates with Arylboronic Acids.
Authors: Chen Hu , Huang Zhongbin , Hu Xiaoming , Tang Guo , Xu Pengxiang , Zhao Yufen , Cheng Chien‐Hong 
Published: June 2011

AbstractIt provides an efficient access to a wide range of biaryls and polyarenes.
ChemInform Abstract: Facile Synthesis of Stereoisomers of the Non‐Secosteroidal Ligand LG190178 and Their Evaluation Using the Mutant Vitamin D Receptor.
Authors: Demizu Yosuke , Nakatsu Aki , Sato Yukiko , Honzawa Shinobu , Yamashita Atsushi , Sugiura Takayuki , Kittaka Atsushi , Kato Shigeaki , Okuda Haruhiro , Kurihara Masaaki 
Published: June 2011

AbstractAll four diastereomers of the non‐secosteroidal ligand LG190178 are prepared by asymmetric reduction of bisphenol derivative (I) with chiral oxazaborolidine reagents followed by treatment with the corresponding glycidol derivatives, e.g. (III).
ChemInform Abstract: Asymmetric Organocatalytic Aza‐Friedel—Crafts Reaction of Naphthols with N‐Sulfonyl Imines.
Authors: Chauhan Pankaj , Chimni Swapandeep Singh 
Published: June 2011

AbstractThe aza‐Friedel—Crafts reaction of naphthols with aromatic N‐sulfonyl imines proceeds smoothly in the presence of a cupreine organocatalyst to give the aminomethyl‐substituted naphthols in good yields and enantioselectivities (up to 98% e.e.).
ChemInform Abstract: Broensted Acidic Ionic Liquids as Efficient Catalysts for the Synthesis of Amidoalkyl Naphthols.
Authors: Heravi M. M. , Tavakoli‐Hoseini N. , Bamoharram F. F. 
Published: June 2011

AbstractThe simple presented synthesis of the compounds (IV) includes the use of reusable and ecofriendly homogeneous catalysts and an easy work‐up.
ChemInform Abstract: Diverse Strategies Toward Indenol and Fulvene Derivatives: Rh‐Catalyzed C—H Activation of Aryl Ketones Followed by Coupling with Internal Alkynes.
Authors: Patureau Frederic W. , Besset Tatiana , Kuhl Nadine , Glorius Frank 
Published: June 2011

AbstractA variety of simple phenones reacts with internal alkynes to afford indenol products.
ChemInform Abstract: Transformation of Anionically Activated Trifluoromethyl Groups to Heterocycles under Mild Aqueous Conditions.
Authors: Qiao Jennifer X. , Wang Tammy C. , Hu Carol , Li Jianqing , Wexler Ruth R. , Lam Patrick Y. S. 
Published: June 2011

AbstractA wide range of heterocyclic compounds is prepared in a one‐pot one‐step reaction without any organic solvent.
ChemInform Abstract: Flexible Strategy for Syntheses of Spirooxindoles Using Palladium‐Catalyzed Carbosilylation and Sakurai‐Type Cyclization.
Authors: Hande Sudhir M. , Nakajima Motoyuki , Kamisaki Haruhi , Tsukano Chihiro , Takemoto Yoshiji 
Published: June 2011

AbstractCarbosilylation is applied to prepare various oxindoles with allylsilane side chain.
ChemInform Abstract: Tandem Blaise—Nenitzescu Reaction: One‐Pot Synthesis of 5‐Hydroxy‐α‐(aminomethylene)benzofuran‐2(3H)‐ones from Nitriles.
Authors: Chun Yu Sung , Ryu Ka Yeon , Kim Ju Hyun , Shin Hyunik , Lee Sang‐gi 
Published: June 2011

AbstractDirect reaction of the zinc bromide complex of β‐enamino esters (Blaise reaction intermediate) with benzoquinones affords title aminomethylenebenzofuranones, e.g. (IV), (VI), (VIII) or (X), instead of the expected indoles (Nenitzescu products).
ChemInform Abstract: Facile Synthesis of 3‐Alkoxy‐4‐cyanothiophenes as New Building Blocks for Donor—Acceptor Conjugated Systems.
Authors: Hergue Noemie , Mallet Charlotte , Savitha Gurunathan , Allain Magali , Frere Pierre , Roncali Jean 
Published: June 2011

AbstractThe title compounds (IV) are prepared by selective O‐alkylation of the intermediate enolate anion of (I) followed by oxidation with DDQ.
ChemInform Abstract: anti‐Selective, Catalytic Asymmetric Vinylogous Mukaiyama Mannich Reactions of Pyrrole‐Based Silyl Dienolates with N‐Aryl Aldimines.
Authors: Curti Claudio , Battistini Lucia , Ranieri Beatrice , Pelosi Giorgio , Rassu Gloria , Casiraghi Giovanni , Zanardi Franca 
Published: June 2011

AbstractThe reaction proceeds with excellent site‐selectivity, high diastereoselectivity, and moderate to good enantioselectivity.
ChemInform Abstract: Phosphine‐Catalyzed [4 + 1] Annulation Between α,β‐Unsaturated Imines and Allylic Carbonates: Synthesis of 2‐Pyrrolines.
Authors: Tian Junjun , Zhou Rong , Sun Haiyun , Song Haibin , He Zhengjie 
Published: June 2011

AbstractThe title reaction provides a new, highly efficient, and diastereoselective approach to trans‐substituted pyrrolines of type (III) and fused pyrrolines like (V).
ChemInform Abstract: L‐Proline‐Catalyzed Asymmetric Michael Addition of 2‐Oxindoles to Enones: A Convenient Access to Oxindoles with a Quaternary Stereocenter.
Authors: Freund Matthias H. , Tsogoeva Svetlana B. 
Published: June 2011

AbstractThe aldol‐type condensation of indolinone (I) with cyclohexenone (II) is investigated in detail and the conditions shown are found to be the most efficient ones.
ChemInform Abstract: Synthesis of Chiral N‐Heterocyclic Carbene Ligands with Rigid Backbones and Application to the Palladium‐Catalyzed Enantioselective Intramolecular α‐Arylation of Amides.
Authors: Liu Lantao , Ishida Naoki , Ashida Shinji , Murakami Masahiro 
Published: June 2011

AbstractA C2‐symmetric imidazolinium ligand is used to catalyzed the intramolecular α‐arylation reaction of amides to afford the oxindole derivatives with high yields and enantioselectivities.
ChemInform Abstract: Enantioselective Friedel—Crafts Alkylation of Indoles with Trifluoroethylidene Malonates by Copper—Bis(oxazoline) Complexes: Construction of Trifluoromethyl‐Substituted Stereogenic Tertiary Carbon Center.
Authors: Wen Lele , Shen Qilong , Wan Xiaolong , Lu Long 
Published: June 2011

AbstractThe title reaction allows an efficient access to biologically important chiral indoles of type (III).
ChemInform Abstract: Copper‐Cascade Catalysis: Synthesis of 3‐Functionalized Indoles.
Authors: Wang Jing , Wang Jinjin , Zhu Yuanxun , Lu Ping , Wang Yanguang 
Published: June 2011

AbstractCopper‐catalyzed three‐component reaction of indoles, sulfonyl azides and terminal alkynes affords efficiently 3‐functionalized indoles.
ChemInform Abstract: One‐Pot Organocatalytic Asymmetric Synthesis of 1H‐Pyrrolo[1,2a]indol‐3(2H)‐ones via a Michael—Hemiaminalization—Oxidation Sequence.
Authors: Enders Dieter , Wang Chuan , Yang Xuena , Raabe Gerhard 
Published: June 2011

AbstractThe initial Michael addition is achieved with very high asymmetric induction.
ChemInform Abstract: Regioselectivity Studies of Sydnone Cycloaddition Reactions of Azide‐Substituted Alkynes.
Authors: Foster Robert S. , Jakobi Harald , Harrity Joseph P. A. 
Published: June 2011

AbstractSurprisingly low levels of regiocontrol are observed in sydnone cycloadditions with heterocyclic alkynes (XI) compared to ethynylbenzene (II).
ChemInform Abstract: Facile Synthesis of Hydantoins and Thiohydantoins in Aqueous Solution.
Authors: Baccolini Graziano , Boga Carla , Delpivo Camilla , Micheleti Gabriele 
Published: June 2011

AbstractP4S10‐induced reaction of urea derivatives with aldehydes results in formation of the title compounds in a short time.
ChemInform Abstract: Rapid, Highly Efficient, and Room‐Temperature TiCl4‐Catalyzed Synthesis of Δ4‐Isoxazolines under Solvent‐Free Conditions.
Authors: Valizadeh Hassan , Dinparast Leila 
Published: June 2011

AbstractThe advantages of the presented synthesis are the relatively inexpensive catalyst and the simple experimental procedure.
ChemInform Abstract: Intramolecular Cyclization of in situ Generated Adducts Formed Between Thioamide Dianions and Thioformamides Leading to Generation of 5‐Amino‐2‐thiazolines and 5‐Aminothiazoles, and Their Fluorescence Properties.
Authors: Murai Toshiaki , Hori Fumihiko , Maruyama Toshifumi 
Published: June 2011

AbstractA variety of aryl‐substituted 5‐amino‐2‐thiazolines is prepared via the title reaction.
ChemInform Abstract: Simple and Efficient Synthesis of 5‐Substituted 1‐H‐Tetrazoles Using Metal‐Modified Clay Catalysts.
Authors: Chermahini Alireza Najafi , Teimouri Abbas , Moaddeli Ali 
Published: June 2011

AbstractMetal‐modified montmorillonite K10 efficiently catalyzes the synthesis of tetrazoles (II) (10 examples) using click chemistry.
ChemInform Abstract: Dynamic Kinetic Resolution in the Stereoselective Synthesis of 4,5‐Diaryl Cyclic Sulfamidates by Using Chiral Rhodium‐Catalyzed Asymmetric Transfer Hydrogenation.
Authors: Han Juae , Kang Soyeong , Lee Hyeon‐Kyu 
Published: June 2011

AbstractOptimal reaction conditions for the rhodium‐catalyzed asymmetric transfer hydrogenation of imines (I) are established.
ChemInform Abstract: Biosynthesis‐Inspired Intramolecular Oxa‐Conjugate Cyclization of α,β‐Unsaturated Thioesters: Stereoselective Synthesis of 2,6‐cis‐Substituted Tetrahydropyrans.
Authors: Fuwa Haruhiko , Noto Kenkichi , Sasaki Makoto 
Published: June 2011

AbstractThe reaction is catalyzed by CSA and proceeds with high to excellent diastereoselectivity for racemic and chiral substrates.
ChemInform Abstract: A New Approach to Cyclic Hydroxamic Acids: Intramolecular Cyclization of N‐Benzyloxy Carbamates with Carbon Nucleophiles.
Authors: Liu Yuan , Jacobs Hollie K. , Gopalan Aravamudan S. 
Published: June 2011

AbstractThe reaction of N‐benzyloxy carbamates such as (I) with carbon nucleophiles followed by intramolecular cyclizations gives a series of five‐ or six‐membered protected cyclic hydroxamic acids such as (IV) or (XIII).
ChemInform Abstract: Asymmetric Michael Addition of Nitrobenzyl Pyridines to Enals via Iminium Catalysis.
Authors: Vera Silvia , Liu Yankai , Marigo Mauro , Escudero‐Adan Eduardo C. , Melchiorre Paolo 
Published: June 2011

AbstractBoth pyridine systems and a p‐nitroaryl substituent are essential for a successful reaction.
ChemInform Abstract: Nitropyridines. Part 9. Synthesis of Substituted 3‐Amino‐5‐nitropyridines
Authors: Sagitullina G. P. , Garkushenko A. K. , Glyzdinskaya L. V. , Uldashev F. A. , Vorontsova M. A. , Sagitullin R. S. 
Published: June 2011

Abstract[by Schmidt [→(II)] or modified Hofmann reactions].
ChemInform Abstract: Lewis Acid Catalyzed Benzylic C—H Bond Functionalization of Azaarenes: Addition to Enones.
Authors: Komai Hirotomo , Yoshino Tatsuhiko , Matsunaga Shigeki , Kanai Motomu 
Published: June 2011

AbstractThe reaction of a variety of methyl‐substituted heteroaromatic compounds with enones is best catalyzed by Sc(OTf)3 or Y(OTf)3.
ChemInform Abstract: Investigation of the One‐Pot Synthesis of Quinolin‐2‐(1H)‐ones and the Discovery of a Variation of the Three‐Component Ugi Reaction.
Authors: Gordon Christopher P. , Young Kelly A. , Hizartzidis Lacey , Deane Fiona M. , McCluskey Adam 
Published: June 2011

AbstractFour‐component Ugi—Knoevenagel reaction of o‐aminophenyl ketones (I) with aromatic aldehydes, cyanoacetic acid and isonitriles provides access towards polyfunctionalized quinolinones, e.g. (V) and (IX).
ChemInform Abstract: Library Construction of 1‐(1H‐Imidazol‐1‐yl)‐1,2‐dihydroisoquinolines via Three‐Component Reaction of 2‐Alkynylbenzaldehyde, Amine, and Imidazole.
Authors: Lou Honglei , Ye Shengqing , Zhang Jianfeng , Wu Jie 
Published: June 2011

AbstractA variety of anilines, substituted alkynylbenzaldehydes and imidazoles can be applied.
ChemInform Abstract: Synthesis of Chiral 1‐Substituted Tetrahydroisoquinolines by the Intramolecular 1,3‐Chirality Transfer Reaction Catalyzed by Bi(OTf)3.
Authors: Kawai Nobuyuki , Abe Ryuzou , Matsuda Mika , Uenishi Jun'ichi 
Published: June 2011

AbstractTreatment of chiral amines of type (I), (III), and (V) with Bi(OTf)3 results in formation of optically active tetrahydroisoquinolines.
ChemInform Abstract: Design, Synthesis and Structure—Activity Relationship of Functionalized Tetrahydro‐β‐carboline Derivatives as Novel PDE5 Inhibitors.
Authors: Ahmed Nermin S. , Gary Bernard D. , Tinsley Hethar N. , Piazza Gary A. , Laufer Stefan , Abadi Ashraf H. 
Published: June 2011

AbstractStarting from D‐ or L‐tryptophane methyl ester all possible diastereoisomers with the skeleton of (III)/(IV), (VI), and (X) are prepared and tested as PDE5 inhibitors.
ChemInform Abstract: Synthesis and in vitro Antihepatitis B Virus Activity of Ethyl 6‐Bromo‐8‐hydroxyimidazo[1,2‐a]pyridine‐3‐carboxylates.
Authors: Chen Dong , Liu Yajing , Zhang Shulan , Guo Dexiang , Liu Chunhong , Li Sai , Gong Ping 
Published: June 2011

Abstract19 Title compounds of type (VIII) are prepared and tested for their in‐vitro anti‐hepatitis B virus activities.
ChemInform Abstract: Synthesis of 3‐Substituted Benzo[g]isoquinoline‐5,10‐diones: A Convenient One‐Pot Sonogashira Coupling/Iminoannulation Procedure.
Authors: Van Aeken Sam , Verbeeck Stefan , Deblander Jurgen , Maes Bert U. W. , Tehrani Kourosch Abbaspour 
Published: June 2011

AbstractTwo routes are given for the access to the title compounds.
ChemInform Abstract: One‐Pot Synthesis of Pyrrolo[3,2‐d]pyridazines and Pyrrole‐2,3‐diones via Zirconocene‐Mediated Four‐Component Coupling of Si‐Tethered Diyne, Nitriles, and Azide.
Authors: Zhang Shaoguang , Zhao Jing , Zhang Wen‐Xiong , Xi Zhenfeng 
Published: June 2011

AbstractThe reaction in the presence of phenyl or benzyl azides leads to formation of the pyrrolo[3,2‐d]pyridazines (IV).
ChemInform Abstract: Silica Gel‐Supported Polyphosphoric Acid (PPA—SiO2) Catalyzed One‐Pot Multi‐Component Synthesis of 3,4‐Dihydropyrimidin‐2(1H)‐ones and ‐thiones: An Efficient Method for the Biginelli Reaction.
Authors: Zeinali‐Dastmalbaf Mohsen , Davoodnia Abolghasem , Heravi Majid M. , Tavakoli‐Hoseini Niloofar , Khojastehnezhad Amir , Zamani Hassan Ali 
Published: June 2011

AbstractThe three‐component reaction of ethyl acetoacetate (I), aryl aldehydes (II), and urea (III) or thiourea (V) in the presence of the title heterogeneous catalyst provides access to title compounds (IV) and (VI) under mild conditions.
ChemInform Abstract: Synthesis and Biological Evaluation of Some Novel Fused Pyrazolopyrimidines as Potential Anticancer and Antimicrobial Agents.
Authors: Abd El Razik Heba A. , Abdel Wahab Abeer E. 
Published: June 2011

AbstractA series of title compounds of type (IV), (VII), (X), and (XI) are prepared and tested for their antimicrobial and anticancer activities.
ChemInform Abstract: NH4Cl Mediated New Protocol for the Synthesis of 5‐Arylidene Barbiturates.
Authors: Khan Khalid Mohammed , Ali Muhammad , Khan Momin , Taha Muhammad , Perveen Shahnaz 
Published: June 2011

AbstractAn eco‐benign method for the synthesis of title compounds (III) is developed using NH4Cl in stoichiometric amount as enolization activator in water.
ChemInform Abstract: A Straightforward and Efficient Synthetic Access to Biologically Active Marine Sesterterpenoids, Sesterstatins 4 and 5.
Authors: Fan Wen‐Yuan , Wang Zheng‐Lin , Li Hong‐Chang , Fossey John S. , Deng Wei‐Ping 
Published: June 2011

AbstractKey step of the described synthesis is the reductive Heck cyclization of precursors (III) and (IV) to construct the D ring of the title compounds.
ChemInform Abstract: Diastereoselective Synthesis of the Indeno‐Tetrahydropyridine Core Bearing a Diaryl‐Substituted Stereogenic Quaternary Carbon Center of Haouamine B.
Authors: Tanaka Takeshi , Inui Hiromi , Kida Hiroshi , Kodama Takeshi , Okamoto Takuya , Takeshima Aki , Tachi Yoshimitsu , Morimoto Yoshiki 
Published: June 2011

AbstractKey steps of the described synthesis are the diastereoselective construction of a diaryl‐substituted stereogenic center by an intramolecular Pd‐catalyze α‐C‐arylation and subsequent direct conversion of the vinologous imid function into the C2‐C25 double bond of haouamine B.
ChemInform Abstract: Concise Synthesis of Pyrrolidine and Indolizidine Alkaloids by a Highly Convergent Three‐Component Reaction.
Authors: Lapointe Guillaume , Schenk Kurt , Renaud Philippe 
Published: June 2011

AbstractA radical carboazidation of alkenes with α‐iodoketones followed by intramolecular reductive amination reaction is successfully applied to the synthesis of a variety of pyrrolidine and indolizidine alkaloids, e.g. monomorine I (XVII).
ChemInform Abstract: Aliphatic Aldehydes in the Synthesis of Carbo‐ and Heterocycles. Part 2. Synthesis of Six‐ and Seven‐Membered Rings, Bicyclic Compounds, and Macrocycles
Authors: Dyachenko V. D. , Karpov E. N. 
Published: June 2011

AbstractReview: data published over the past decade; 241 refs.
ChemInform Abstract: Catalysts for Hydrogen Production from Heavy Hydrocarbons
Authors: Navarro Yerga Rufino M. , Alvarez‐Galvan M. Consuelo , Mota Noelia , Villoria de la Mano Jose A. , Al‐Zahrani Saeed M. , Fierro Jose L. G. 
Published: June 2011

AbstractReview: 165 refs.
Synthesis and Biological Study of Some 4‐oxo‐Thiazolidine Derivatives of 2‐Aminothiazole
Authors: Samadhiya Pushkal , Sharma Ritu , Srivastava Santosh K. , Srivastava Savitri D. 
Published: June 2011

AbstractConventional and microwave assisted synthesis of new series of N‐[2‐{2‐(substituted phenyl)‐4‐oxo‐5‐(substituted benzylidene)‐1,3‐thiazolidine}‐iminoethyl]‐2‐aminothiazole 5a–5m have been developed. The cycloaddition reaction of thioglycolic acid with N‐{2‐(substituted benzylidenehydrazino)‐ethyl}‐2‐aminothiazole 3a–3m in the presence of anhydrous ZnCl2 afforded new heterocyclic compounds N‐[2‐{2‐(substituted phenyl)‐4‐oxo‐1,3‐thiazolidine}‐iminoethyl]‐2‐aminothiazole 4a–4m. The later product on treatment with several selected substituted aromatic aldehydes in the presence of C2H5ONa undergoes Knoevenagel reaction to yield 5a–5m. The structures of compounds 1, 2, 3a–3m, 4a–4m and 5a–5m were confirmed by IR, 1H NMR, 13C NMR, FAB‐Mass and chemical analysis. All above compounds were screened for their antimicrobial activities against some selected bacteria and fungi and antituberculosis study against M. tuberculosis.
Synthesis, Crystal Structure and Insecticidal Activity of the Optical Active Neonicotinoid Analogues
Authors: Xue Sijia , Bu Hongfei , Liu Li , Xu Xiao , Ma Xubo 
Published: June 2011

AbstractEight novel neonicotinoid analogues 1‐(2‐tetrahydrofurfuryl)‐5‐substituted‐1,3,5‐hexahydrotriazine‐2‐N‐nitroimines 3a–3h were synthesized, and their structures were characterized by 1H NMR, IR and elemental analysis. The stereostructure of 3a was determined by the single‐crystal X‐ray analysis, which exhibits a half‐chair conformation and dihedral angle is 49.70°. The preliminary bioassay tests showed that all the title compounds exhibited good insecticide activities against Nilaparvata legen (N. legen).
Electrocatalysis of Puerarin on a Nano‐CeO2/MWCNTs Composite Modified Electrode and Its Determination in Pharmaceutical Preparations
Authors: Ji Yulan , Wang Guangfeng , Zhang Cuihong , Fang Bin 
Published: June 2011

AbstractA good route for the fabrication of CeO2 nanoparticles (nano‐CeO2)/multi‐walled carbon nanotubes (MWCNTs) modified glassy carbon electrodes (GCE) was proposed. MWCNTs are used to immobilize nano‐CeO2. What′s more, with the addition of the MWCNTs, the agglomeration level of CeO2 nanoparticles can be reduced, the extremely large surface area can be obtained and the electron transfer rate can be increased. The morphological characterization of nano‐CeO2/MWCNTs was examined by scanning electron microscopy (SEM). The performances of the nano‐CeO2/MWCNTs/GCE were characterized with cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and typical amperometric response (i‐t). The potential utility of the constructed electrodes was demonstrated by applying them to the analytical determination of puerarin concentration. The catalytic oxidation of puerarin has a better result on nano‐CeO2/MWCNTs/GCE because of the synergistic effect of nano‐CeO2 and MWCNTs. An optimized limit of detection of 8.0×10−9 mol/L was obtained at a signal‐to‐noise ratio of 3 and with a fast response time (within 3 s). Additionally, the nano‐CeO2/MWCNTs/GCE exhibited a wide linear range from 0.04 to 6.0 μmol/L and high sensitivity.
Identification between Fimbristylis miliacea (L.) Vahl and Fimbristhlis stauntonii Debeaux et Franch. by CWT‐FTIR‐RBFNN
Authors: Hong Qinghong , Yu Ruipeng , Zheng Renwei , Wang Hong , Cheng Cungui 
Published: June 2011

AbstractHorizontal attenuation total reflection‐Fourier transform infrared spectroscopy (HATR‐FTIR) is used to measure the FTIR of Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed. In order to extrude the difference between Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed, continuous wavelet transform (CWT) is used to decompose the FTIR of Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed. Three main scales are selected as the feature extracting space in the CWT domain. According to the distribution of FTIR of Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed, three feature regions are determined at every spectra band at selected three scales in the CWT domain. Thus nine feature parameters form the feature vector. The feature vector is input to the radial basis function neural network (RBFNN) to train so as to accurately classify the Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed. 110 couples of FTIR are used to train and test the proposed method, where 60 couples are used as training samples and 50 couples are used as testing samples. Experimental results show that the accurate recognition rate between Fimbristylis miliacea (L.) Vahl seed and Fimbristhlis stauntonii Debeaux et Franch. seed is respectively 96% and 98% by using the proposed method.