bluuebunny/crossref_metadata_2025 huggingface dataset:
ChemInform Abstract: Atom‐Efficient Synthesis of α‐Alkylidene‐N‐furylimines via Catalytic Vinylcarbene‐Transfer Reactions to Carbonyl‐ene‐nitrile Compounds.
Authors: Murai Masahito , Yoshida Shotaro , Miki Koji , Ohe Kouichi
Published: September 2010

The platinum‐catalyzed reaction of carbonyl‐ene‐nitriles (I) with propargyl acetates (II) leads to the desired α‐alkylidene‐N‐furylimines (III).
ChemInform Abstract: Base‐ and Copper‐Catalyzed Intramolecular Cyclization for the Direct Synthesis of Dihydrofurans.
Authors: Chen Yong‐Fei , Wang Hai‐Fei , Wang Ya , Luo Yong‐Chun , Zhu Hai‐Liang , Xu Peng‐Fei
Published: September 2010

A simple, mild, and efficient method to prepare 5‐methylene‐4,5‐dihydrofurans is reported.
ChemInform Abstract: Catalytic Asymmetric 1,3‐Dipolar Cycloaddition of α‐Iminonitriles.
Authors: Robles‐Machin Rocio , Alonso Ines , Adrio Javier , Carretero Juan C.
Published: September 2010

The catalytic asymmetric 1,3‐cycloaddition of α‐iminonitriles is developed.
ChemInform Abstract: An Efficient Method for the Synthesis of Unsymmetrical 2,2′‐Bis(pyrrolyl)alkanes.
Authors: Murat‐Onana Marie Laure , Berini Christophe , Minassian Frederic , Pelloux‐Leon Nadia , Denis Jean‐Noel
Published: September 2010

A novel two‐step approach towards unsymmetrical bis(pyrrolyl)alkanes is presented.
ChemInform Abstract: Pd(OAc)2‐Catalyzed C—H Activation of Indoles: A Facile Synthesis of 3‐Cyanoindoles.
Authors: Reddy B. V. Subba , Begum Zubeda , Reddy Y. Jayasudhan , Yadav J. S.
Published: September 2010

The novel protocol allows the direct cyanation of indoles through C—H bond activation to give the C‐3 substituted derivatives regioselectively.They represent potential materials in drug synthesis and precursors of natural products.
ChemInform Abstract: Squaramide‐Catalyzed Enantioselective Friedel—Crafts Reaction of Indoles with Imines.
Authors: Qian Yong , Ma Gaoyuan , Lv Aifeng , Zhu Hai‐Liang , Zhao Jing , Rawal Viresh H.
Published: September 2010

Chiral squaramides bearing hydrogen bond donor functions are found to be highly active catalysts for the enantioselective Friedel—Crafts reaction of indole (I) with tosyl imines (II) affording 3‐indolylmethanamines (III) in high yields and enantioselectivities.
ChemInform Abstract: Facile and Mild Synthesis of Bis(3‐indolyl)methanes.
Authors: Ghorbani‐Vaghei R. , Malaekehpoor S. M.
Published: September 2010

A convenient method for the synthesis of bis(3‐indolyl)methanes (III) from indole and various aldehydes or ketones in the presence of N,N,N′,N′‐tetrabromo‐1,3‐benzenedisulfonamide (TBBDA) or poly(N,N′‐bromobenzene‐1,3‐disulfonylamide‐N,N′‐1,2‐ethanediyl) (PBBS) is reported.
ChemInform Abstract: Highly Diastereoselective Samarium Diiodide Induced Ketyl Cyclizations of Indole and Pyrrole Derivatives —Scope and Limitations.
Authors: Beemelmanns Christine , Blot Virginie , Gross Steffen , Lentz Dieter , Reissig Hans‐Ulrich
Published: September 2010

Di‐, tri‐ and tetracyclic indole and pyrrole derivatives are synthesized.
ChemInform Abstract: Novel Synthesis of Naphtho[2,1‐b]pyrano Pyrrolizidines and Indolizidines Through Intramolecular 1,3‐Dipolar Cycloaddition Reaction.
Authors: Kathiravan Subban , Vijayarajan Devannah , Raghunathan Raghavachary
Published: September 2010

The condensation—cyclization—decarboxylation sequence leads to formation of azomethine ylide intermediates which undergo intramolecular 1,3‐dipolar cycloaddition to provide the title compounds as core units of natural products.
ChemInform Abstract: Cationic Three‐Component Coupling Involving an Optically Active Enamine Derivative. From Time Integration to Space Integration of Reactions.
Authors: Suga Seiji , Yamada Daisuke , Yoshida Jun‐ichi
Published: September 2010

A one‐pot sequential method is elaborated for the synthesis of chiral oxazole derivatives by reaction of chiral oxazole (I) with N‐acyliminium cation (II) followed by addition of a nucleophile.
ChemInform Abstract: Synthesis of Oxazolidinones Initiated by Regio‐ and Diastereocontrolled Crotylation of α‐Dicarbonyl Compounds.
Authors: Shibata Ikuya , Kojima Ryota , Tsunoi Shinji , Nozaki Takashi , Watanabe Tomonari , Ninomiya Atsushi , Yasuda Makoto , Baba Akio
Published: September 2010

Allylation of α‐dicarbonyl compounds (I), (VI) or (X) with allyl‐ or crotyl‐tributyltin reagents followed by cyclization with isocyanates (III) provides access towards polyfunctionalized oxazolidinones, e.g. (IV), (V)/(VI) or (VIII).
ChemInform Abstract: Facile Synthesis of Benzoxazoles from 1,1‐Dibromoethenes.
Authors: Tao Kemei , Zheng Jianlong , Liu Zhaogui , Shen Wang , Zhang Jiancun
Published: September 2010

A base‐mediated direct coupling of 2‐aminophenols with 1,1‐dibromoethenes provides a new route to the synthesis of benzoxazoles.
ChemInform Abstract: Synthesis and Antimicrobial Evaluation of Some New 2‐(6‐Oxo‐5,6‐dihydro[1,3]thiazolo [3,2‐b]‐2‐aryloxymethyl‐1,2,4‐triazol‐5‐yl)‐N‐arylacetamides.
Authors: Lobo Prajwal L. , Poojary Boja , Manjunatha Kumsi , Kumari Nalilu Suchetha
Published: September 2010

A series of arylacetamides (III) (20 examples) is synthesized by condensing triazole‐3‐thiol (I) with various N‐phenylmaleimides (II).
ChemInform Abstract: Design, Synthesis, Characterization, and Antibacterial Activity of {5‐Chloro‐2‐ [(3‐substitutedphenyl‐1,2,4‐oxadiazol‐5‐yl)‐methoxy] ‐phenyl}‐(phenyl)‐methanones.
Authors: Rai Neithnadka Premsai , Narayanaswamy Venugopala Katharigatta , Govender Thavendran , Manuprasad B. K. , Shashikanth Sheena , Arunachalam Pirama Nayagam
Published: September 2010

Title compounds (VI) are investigated for in vitro qualitative (zone of inhibition) and quantitative (MIC) antibacterial activity.
ChemInform Abstract: Organocatalytic Asymmetric Intramolecular [3 + 2] Cycloaddition: A Straightforward Approach to Access Multiply Substituted Hexahydrochromeno[4,3‐b]pyrrolidine Derivatives in High Optical Purity.
Authors: Li Nan , Song Jin , Tu Xi‐Feng , Liu Bin , Chen Xiao‐Hua , Gong Liu‐Zhu
Published: September 2010

A chiral dinaphthyl‐BINOL‐derived phosphoric acid (NABIP) efficiently catalyzes the asymmetric intramolecular cycloaddition of formylphenoxybutenoates (I) and (IV) in the presence of α‐amino‐α‐aryl esters (II).
ChemInform Abstract: Reactions of Nitroxides. Part 8. Nitroxides with a Cyanato Substituent.
Authors: Zakrzewski Jerzy
Published: September 2010

Compounds (VI) and (XI) are synthesized as first examples of nitroxyl radicals bearing a cyanato functional group.
ChemInform Abstract: An Efficient Synthesis of Some Substituted Piperidin‐4‐one Thiosemicarbazone Derivatives as Potential Anticonvulsant under Microwave Irradiation.
Authors: Rastogi Sameer , Rastogi Harshita
Published: September 2010

Microwave irradiation leads to an increased reaction rate and enhanced yields for both steps compared to conventional heating.
ChemInform Abstract: Ionic‐Liquid Salt‐Mediated Synthesis of 4′‐(Pyridyl)‐terpyridines.
Authors: Jadhav Sumit V. , Ingole Pravin G. , Bajaj Hari C.
Published: September 2010

The introduced synthesis of terpyridines (III) using [bmim]BF4 as solvent is ecofriendly but rather expensive.
ChemInform Abstract: A Convenient Stereoselective Synthesis of trans‐4a,5,8,8a‐Tetrahydro‐2H‐isoquinolin‐1‐ones via trans 3‐Allylation of 4‐Allyl‐3,4‐dihydropyridine‐2‐thiones and RCM as Key Steps.
Authors: Sosnicki Jacek G. , Struk Lukasz
Published: September 2010

The process offers a convenient access to the desired heterocyclic skeleton, present in alkaloids and synthetic drugs.
ChemInform Abstract: Synthesis of 4‐Aryl‐3‐methyl‐6‐oxo‐4,5,6,7‐tetrahydro‐2H‐pyrazolo [3,4‐b]pyridine‐5‐carbonitrile via a One‐Pot, Three‐Component Reaction.
Authors: Rahmati Abbas
Published: September 2010

3‐Amino‐5‐methylpyrazole, ethyl cyanoacetate and aromatic aldehydes undergo an acid‐catalyzed condensation to generate diastereomeric mixtures of pyrazolopyridinones (III)/(IV).
ChemInform Abstract: Regioselective Nucleophilic Aromatic Substitution of Benzo[c][2,7]naphthyridines.
Authors: Nutaitis Charles F. , Przyuski Katrin , Ross Vincent
Published: September 2010

The title reaction is studied using lithiated aromatic heterocycles as nucleophiles.
ChemInform Abstract: Highly Efficient Synthesis and Characterization of the GPR30‐Selective Agonist G‐1 and Related Tetrahydroquinoline Analogues.
Authors: Burai Ritwik , Ramesh Chinnasamy , Shorty Marvin , Curpan Ramona , Bologa Cristian , Sklar Larry A. , Oprea Tudor , Prossnitz Eric R. , Arterburn Jeffrey B.
Published: September 2010

Lewis acid‐catalyzed aza‐Diels—Alder cycloaddition of an aniline derivative (I) with cyclopentadiene (II) and various aromatic bromides (III) can be carried out in a three‐component process or by two‐step method to afford GPR30‐selective antagonist G‐1 (IVa) and derivatives (IV), (VI)/(VII), (IX), (XI)/(XII).
ChemInform Abstract: Regiochemistry of Nucleophilic Substitution of 4‐Phenylsulfonyl Tetrafluoropyridine with Unequal Bidentate Nucleophiles.
Authors: Ranjbar‐Karimi Reza , Mousavi Mirrasoul
Published: September 2010

Unequal binucleophiles react efficiently with tetrafluoropyridine (I) to give corresponding fused pyridine derivatives via initial regioselective substitution at the 2‐position of the pyridine ring by the nitrogen nucleophile site followed by intramolecular ring closure at the geometrically accessible 3‐position of the pyridine ring.
ChemInform Abstract: Novel Intramolecular Aza‐Diels—Alder Reaction: A Facile Synthesis of trans‐Fused 5H‐Chromeno[2,3‐c]acridine Derivatives.
Authors: Reddy B. V. Subba , Antony Aneesh , Yadav J. S.
Published: September 2010

The intermediate amines undergo intramolecular aza‐Diels—Alder reaction to give the trans‐isomer predominantly.
ChemInform Abstract: A New Approach to the Synthesis of Diacetals (Diketals) of Pentaerythritol Catalyzed by SO3H‐Functionalized Ionic Liquids.
Authors: Wang Yuan Yuan , Xu Yan Nan , Wang Zhi Zhong , Dai Li Yi
Published: September 2010

[PsPy]OTf is found to be the most effective catalyst which affords the products in good to excellent yields and can be recycled at least 8 times without loss of activity.
ChemInform Abstract: One‐Pot Three‐Component Biginelli‐Type Reaction Catalyzed by Ionic Liquids in Aqueous Media.
Authors: Fang Dong , Zhang Dai‐zhen , Liu Zu‐liang
Published: September 2010

An efficient procedure for the synthesis of DHPMs via one‐pot three‐component Biginelli‐type reaction catalyzed by dicationic liquids is developed.
ChemInform Abstract: Synthesis and in vitro Study of Biological Activity of Heterocyclic N‐Mannich Bases of 3,4‐Dihydropyrimidine‐2(1H)‐thiones.
Authors: Shah T. B. , Gupte A. , Patel M. R. , Chaudhari V. S. , Patel H. , Patel V. C.
Published: September 2010

Mannich bases obtained from Biginelli‐derived DHPMs (I) are assayed for their in vitro antimicrobial activity against E.
ChemInform Abstract: Desulfitative Cross‐Coupling of Protecting Group Free 2‐Thiouracil Derivatives with Organostannanes.
Authors: Sun Qi , Suzenet Franck , Guillaumet Gerald
Published: September 2010

The protocol provides an efficient approach to various 2‐substituted pyrimidinones.
ChemInform Abstract: A Facile and Clean Synthesis of Pyrimidine Derivatives via Three‐Component Reaction in Aqueous Media.
Authors: Shi Daqing , Shi Jingwen , Rong Shaofeng
Published: September 2010

The outcome of the reaction between 6‐aminopyrimidine‐2,4‐diones and aromatic aldehydes in the presence of Meldrum′s acid depends on the electronic nature of the aldehyde.
ChemInform Abstract: Reactions of 1,3‐Benzothiazines and 1,4‐Benzothiazepines with Dimethyl Acetylenedicarboxylate.
Authors: Fodor Lajos , Csomos Peter , Bernath Gabor , Sohar Pal , Holczbauer Tamas , Kalman Alajos
Published: September 2010

Novel heterocycles (III) and (V) are obtained unexpectedly.
ChemInform Abstract: Rh(I)‐Catalyzed Cycloisomerization of Vinyl Bicyclopropyl Compounds to Azabicyclo[3.2.2]nona‐2,8‐dienes.
Authors: Kim Sun Young , Kang Youn K. , Chung Young Keun
Published: September 2010

Nitrogen‐containing heterobicycles can be synthesized from vinyl bicyclopropyl derivatives in the presence of a Rh(I) catalyst.
ChemInform Abstract: Photochemical Isomerization of Boryl‐Substituted Silole Derivatives.
Authors: Ugolotti Juri , Kehr Gerald , Froehlich Roland , Erker Gerhard
Published: September 2010

Boryl‐functionalized siloles of type (III) and (V) bearing the conjugated boryl substituent in the β‐position rearrange completely to their α‐boryl regioisomers (IV) and (VI), respectively, upon irradiation with Pyrex‐filtered UV light.
ChemInform Abstract: N‐Dimethylphosphinoyl‐Substituted Aminomethanephosphonic Acids
Authors: Lachkova Victoria , Varbanov Sabi , Frank Walter , Keck Helmut
Published: September 2010

synthesis and characterization of previously unknown title compounds (III) and (VI)
ChemInform Abstract: Convenient, Solvent‐Free Method for Preparation of [Hydroxy(phosphoryloxy)iodo]arenes.
Authors: Zhu Min , Cai Cheng Gang , Ke Wei , Shao Jing
Published: September 2010

A rapid and convenient method for the preparation of title arenes proceeds by simple, solvent‐free ligand exchange reaction in an agate mortar.
ChemInform Abstract: First Principles Design of Derivatizing Agent for Direct Determination of Enantiomeric Purity of Chiral Alcohols and Amines by NMR Spectroscopy.
Authors: Orlov Nikolay V. , Ananikov Valentine P.
Published: September 2010

A novel Se‐based chiral derivatizing agent (IV) for the determination of the enantiomeric purity of alcohols and amines using NMR spectroscopy is described.
ChemInform Abstract: Facile Synthesis of Selenium‐Containing Bicyclic β‐Lactams Through Enyne Metathesis.
Authors: Bankar Deepali B. , Koketsu Mamoru
Published: September 2010

Novel selenium‐containing bicyclic β‐lactams are synthesized by a stereoselective insertion of (but‐3‐enyl)seleno and propargylseleno moieties at the C(4) positions of azetidinones with subsequent ring‐closing enyne metathesis.
ChemInform Abstract: Synthesis and Semiempirical Studies of Quinodimethane Derivatives as Precursors for Indigoid Dyes.
Authors: Pardasani R. T. , Pardasani Pushpa , Abraham Ignatious
Published: September 2010

Reaction of cyclohexan‐1,4‐dione with different active methylene heterocycles affords tetrahydroquinodimethane derivatives which are dehydrogenated to targeted indigoid dye precursors (IV)—(VI).
ChemInform Abstract: Synthesis and Structure of Nitrones Derived from 2‐Trifluoromethyl Bornane 3‐Imines.
Authors: Mloston Grzegorz , Obijalska Emilia , Linden Anthony , Heimgartner Heinz
Published: September 2010

Oxidation of title compounds (I) unexpectedly results in the formation of nitrones (II) instead of the expected oxaziridines.
ChemInform Abstract: Gomphostenins: Two New Antimalarial Compounds from the Leaves of Gomphostemma niveum.
Authors: Sathe Manisha , Kaushik M. P.
Published: September 2010

Two new diterpenes, named Gomphostenin (Ia) and Gomphostenin‐A (Ib), are evaluated in vitro for antimalarial activity against Plasmodium falciparum.
ChemInform Abstract: Four New Sesquiterpenes from Curcuma wenyujin and Their Inhibitory Effects on Nitric‐Oxide Production.
Authors: Lou Yan , Zhao Feng , He Hao , Peng Kai‐Feng , Chen Li‐Xia , Qiu Feng
Published: September 2010

Among dehydroxysipanolinolide (I), curcolide (II), curcodione (III) and curcumadionol (IV) only (III) reveals a very weak activity.
ChemInform Abstract: Site‐Specific Functionalization of Proteins by a Staudinger‐Type Reaction Using Unsymmetrical Phosphites.
Authors: Boehrsch Verena , Serwa Remigiusz , Majkut Paul , Krause Eberhard , Hackenberger Christian P. R.
Published: September 2010

Unsymmetrical phosphites (II) and (V) react chemoselectively in a Staudinger reaction with p‐azido‐phenylalanine, which can be applied for the biotinylation of proteins, to afford the phosphoramidates (III) and (VI), respectively.
ChemInform Abstract: Design, Synthesis, Inhibitory Activity, and Binding Mode Study of Novel DNA Methyltransferase 1 Inhibitors.
Authors: Suzuki Takayoshi , Tanaka Rikako , Hamada Shohei , Nakagawa Hidehiko , Miyata Naoki
Published: September 2010

A series of reaction products from maleic anhydrides and tryptophan is synthesized as novel non‐nucleoside DNA methyltransferase (DNMT) inhibitors.
ChemInform Abstract: Highly Chemo‐ and Stereoselective Glycosidation of Permethacrylated O‐Glycosyl Trichloroacetimidate Reagents Promoted by TMSNTf2.
Authors: Zandanel Christelle , Dehuyser Laure , Wagner Alain , Baati Rachid
Published: September 2010

The method affords generally the β‐isomers as main or exclusive products.
ChemInform Abstract: Structures, Reactivities, and Antibiotic Properties of the Marinopyrroles A—F.
Authors: Hughes Chambers , Kauffman Christopher A. , Jensen Paul R. , Fenical William
Published: September 2010

The title compounds show significant activity against methicillin‐resistant Staphylococcus aureus.
ChemInform Abstract: Novel Synthesis of the Isoflavone Genistein.
Authors: Denis Jeffrey D. St. , Gordon James S. IV , Carroll Vincent M. , Priefer Ronny
Published: September 2010

A novel five‐step sequence for the synthesis of genistein (VIb) from ketone (Ia) involves formation of the enamino ketone (III) followed by ring closure and Suzuki coupling.
ChemInform Abstract: Enantioselective Synthesis of α‐Methylene‐β‐hydroxy Carboxylic Acid Derivatives via a Diastereoselective Aldol/β‐Elimination Sequence: Application to the C(15)—C(21) Fragment of Tedanolide C.
Authors: Barth Roland , Roush William R.
Published: September 2010

A highly stereoselective synthesis of oxazolidinone‐protected α‐methylene‐β‐hydroxycarboxylic amides, e.g. (III), (VII) or (IX), is presented, involving the reaction of a chiral boron enolate [generated from phenylselenide (I)] with various aldehydes, followed by H2O2 oxidation.
ChemInform Abstract: The Meldrum′s Acid Route to Prodigiosin Analogues.
Authors: Hunter Gordon A. , McNab Hamish , Withell Kirsti
Published: September 2010

A range of analogues where the pyrrole segments are replaced by thiophene parts is synthesized based on the hydroxy heterocycles (II), which are obtained by flash vacuum pyrrolysis of Meldrum′s acid derivatives (I).
ChemInform Abstract: anti‐Invasive and anti‐Angiogenic Activities of Naturally Occurring Dibenzodiazepine BU‐4664L and Its Derivatives.
Authors: Miyanaga Satoshi , Sakurai Hiroaki , Saiki Ikuo , Onaka Hiroyasu , Igarashi Yasuhiro
Published: September 2010

Starting from naturally occurring dibenzodiazepine (Ia), derivatives (Ib), (Ic) and (II) are synthesized and evaluated for their antitumor and anti‐angiogenic activities.
ChemInform Abstract: Antiinfluenza Diarylheptanoids from the Bark of Alnus japonica
Authors: Nguyen Huu Tung , Kwon Hyuk‐Joon , Kim Jae‐Hong , Ra Jeong Chan , Ding Yan , Kim Jeong Ah , Kim Young Ho
Published: September 2010

isolation, structure elucidation and antiviral activity of two new diarylheptanoids, oregonoyl A (Ia) and oregonoyl B (Ib) along with nine known compounds
ChemInform Abstract: Cyclic Diarylheptanoids as Na+‐Glucose Cotransporter (SGLT) Inhibitors from Acer nikoense.
Authors: Morita Hiroshi , Deguchi Jun , Motegi Yusuke , Sato Seizo , Aoyama Chihiro , Takeo Jiro , Shiro Motoo , Hirasawa Yusuke
Published: September 2010

Isolation, structure determination and structure—activity relationships of two new diarylheptanoids, acerogenins A (Ia) and B (Ib), are described.
ChemInform Abstract: Bi‐linderone (I), a Highly Modified Methyl‐linderone Dimer from Lindera aggregata with Activity Toward Improvement of Insulin Sensitivity in vitro
Authors: Wang Fei , Gao Yuan , Zhang Ling , Liu Ji‐Kai
Published: September 2010

isolation, structure elucidation and screening for biological activity
ChemInform Abstract: The Mechanism of Water Oxidation: From Electrolysis via Homogeneous to Biological Catalysis
Authors: Dau Holger , Limberg Christian , Reier Tobias , Risch Marcel , Roggan Stefan , Strasser Peter
Published: September 2010

Review: 160 refs.
ChemInform Abstract: The Merits of Static and Dynamic High‐Resolution Electron Microscopy (HREM) for the Study of Solid Catalysts
Authors: Thomas John Meurig , Midgley Paul A.
Published: September 2010

Review: 98 refs.
ChemInform Abstract: New Routes for the Synthesis of Nanocomposite Layers of Inorganic Compounds by the Layer‐by‐Layer Scheme
Authors: Tolstoi V. P.
Published: September 2010

Review: 15 refs.
ChemInform Abstract: Recent Progress in Exploring Magnetocaloric Materials
Authors: Shen B. G. , Sun J. R. , Hu F. X. , Zhang H. W. , Cheng Z. H.
Published: September 2010

Review: 113 refs.
ChemInform Abstract: A Review of the Water Gas Shift Reaction Kinetics
Authors: Smith R. J. Byron , Muruganandam Loganathan , Murthy Shekhar Shantha
Published: September 2010

Review: 61 refs.
ChemInform Abstract: Regioselective Functionalization of the Imidazole Ring via Transition Metal‐Catalyzed C—N and C—C Bond Forming Reactions
Authors: Bellina Fabio , Rossi Renzo
Published: September 2010

Review: 245 refs.
ChemInform Abstract: Transition Metal Catalyzed Ring Expansion Cyclization Reactions
Authors: Yoshida Masahiro , Nagao Yoshimitsu
Published: September 2010

Review: 64 refs.
ChemInform Abstract: Cyclopropanation, Epoxidation and Aziridination Reactions
Authors: Ye Song , Tang Yong
Published: September 2010

Review: 214 refs.
ChemInform Abstract: Remarkably Chemoselective: Modification of Native Proteins
Authors: Harschneck Tobias , Kirsch Stefan F.
Published: September 2010

Review: 17 refs.
ChemInform Abstract: The Structure and Tautomerism of Azo‐Coupled β‐Enaminones
Authors: Simunek Petr , Machacek Vladimir
Published: September 2010

Review: 28 refs.
ChemInform Abstract: Fullerene‐Containing Supramolecular Polymers
Authors: Haino Takeharu
Published: September 2010

Review: 114 refs.
ChemInform Abstract: Highly Stereoselective Hydrogenations as Key Steps in the Total Synthesis of Statins
Authors: Andrushko Natalia , Andrushko Vasyl , Tararov Vitali , Korostylev Andrei , Koenig Gerd , Boerner Armin
Published: September 2010

Review: 42 refs.
ChemInform Abstract: A Cautionary Note on the Correct Structure Assignment of Phytoprostanes and the Emergence of a New Prostane Ring System
Authors: Jahn Ullrich , Galano Jean‐Marie , Durand Thierry
Published: September 2010

Review: 17 refs.
ChemInform Abstract: Photochemical Oxidative Cyclization of Stilbenes and Stilbenoids: The Mallory Reaction
Authors: Joergensen Kaare B.
Published: September 2010

Review: 93 refs.
ChemInform Abstract: Suzuki—Miyaura Cross‐Coupling Reactions in Aqueous Media: Green and Sustainable Syntheses of Biaryls
Authors: Polshettiwar Vivek , Decottignies Audrey , Len Christophe , Fihri Aziz
Published: September 2010

Review: 124 refs.
ChemInform Abstract: Synthesis of Alkyl‐ and Cycloalkylamines by Hydroaminomethylation of Alkenes
Authors: Boerner A. , Beller M. , Wuensch B.
Published: September 2010

Review: 23 refs.
ChemInform Abstract: Palladium‐Catalyzed Heck‐Type Coupling of Allyl Esters: β‐Hydride versus β‐Acetoxy Elimination
Authors: Pan Delin , Jiao Ning
Published: September 2010

Review: ca. 100 refs.
ChemInform Abstract: Catalytic Reactions of Chiral Guanidines and Guanidinium Salts
Authors: Leow Dasheng , Tan Choon‐Hong
Published: September 2010

Review: ca. 80 refs.
ChemInform Abstract: Pharmacological Targeting of CDK9 in Cardiac Hypertrophy
Authors: Krystof Vladimir , Chamrad Ivo , Jorda Radek , Kohoutek Jiri
Published: September 2010

Review: 143 refs.
ChemInform Abstract: Most Efficient Routes for the Synthesis of α,β‐Diamino Acid Derived Compounds
Authors: Wang Jiang , Zhang Lei , Jiang Hualiang , Liu Hong
Published: September 2010

Review: 55 refs.
ChemInform Abstract: Copper‐Catalyzed Asymmetric β‐Boration of α,β‐Unsaturated Carbonyl Derivatives
Authors: Mantilli Luca , Mazet Clement
Published: September 2010

Review: 43 refs.
ChemInform Abstract: Shape‐Persistent Rings and Wheels
Authors: Hoeger Sigurd
Published: September 2010

Review: 63 refs.
ChemInform Abstract: Synthesis of Arenes and Heteroarenes by Hydroarylation Reactions Catalyzed by Electrophilic Metal Complexes
Authors: de Mendoza Paula , Echavarren Antonio M.
Published: September 2010

Review: 191 refs.
ChemInform Abstract: Asymmetric Hydrogenation Through Metal—Ligand Bifunctional Catalysis
Authors: Noyori Ryoji , Ohkuma Takeshi , Sandoval Christian A. , Muniz Kilian
Published: September 2010

Review: 17 refs.
ChemInform Abstract: Electrode Reactions and Electroanalysis of Organomercury Compounds
Authors: Kurmaz V. A. , Gul'tyai V. P.
Published: September 2010

Review: 396 refs.
ChemInform Abstract: Chirality Organization of Peptide Conjugated Molecules in Bioorganometallic Chemistry
Authors: Moriuchi Toshiyuki , Hirao Toshikazu
Published: September 2010

Review: 40 refs.
ChemInform Abstract: Natural Products from Marine Derived Microorganisms
Authors: Shizuri Yoshikazu
Published: September 2010

Review: 17 refs.
ChemInform Abstract: Ionic Liquids as Electrolytes for Li‐Ion Batteries: An Overview of Electrochemical Studies
Authors: Lewandowski Andrzej , Swiderska‐Mocek Agnieszka
Published: September 2010

Review: 85 refs.
ChemInform Abstract: Antibiotic Resistance by Enzyme Inactivation: From Mechanisms to Solutions
Authors: De Pascale Gianfranco , Wright Gerard D.
Published: September 2010

Review: 74 refs.
Product design of Disperse Raw Materials by Chemical Reactions
Authors: Rähse W. , Dicoi O.
Published: September 2010

Bei der Gewinnung und Veredelung von Stoffen aus natürlichen Ressourcen finden Umsetzungen zwischen gemahlenen Rohstoffen und fluiden Medien (Gase, Flüssigkeiten) statt. Ausgangsmaterialien sind mineralische und fossile Stoffe, wie Erze und Kohlen, sowie Nachwachsende Rohstoffe. In den Modellvorstellungen schrumpfen die Ausgangspartikel während der Reaktion. Das Design gebildeter Partikel hängt u. a. von der Qualität, weiteren Vorbehandlungen und den dispersen Eigenschaften der Rohstoffe ab. Läuft der Prozess über eine Schmelze, so kann das Produktdesign durch Reinigung, Zusätze und Formgebung eingestellt werden. Anderenfalls weisen Partikel aus pulvrigen, granularen oder fasrigen Ausgangsstoffen nach der Umsetzung zwar eine völlig andere Chemie auf, behalten aber weitgehend die Größe und Form des Ausgangsmaterials bei. Für ein weitergehendes Produktdesign sind nachgeschaltete Prozesse erforderlich.
Process Engineering Design of Evaporators
Authors: Scholl S.
Published: September 2010

In dieser Arbeit wird eine Methodik zum systematischen Design verfahrenstechnischer Apparate am Beispiel von Kolonnensumpfverdampfern vorgestellt. Der Designprozess umfasst die Schritte Apparatewahl, Apparategestaltung und Dimensionierung. Zur Apparatewahl wird als quantifizierendes Maß für die Übereinstimmung von Anforderungs‐ und Eigenschaftsprofil ein Eignungsgrad eingeführt. Die vorgestellte Methodik kann für Standardfälle des Apparatedesign unterstützen und so zur beschleunigten Prozessentwicklung beitragen.
Copper Winning from Metallurgical Slags
Authors: Maurell‐Lopez S. , Zander M. , Böhlke J. , Degel R. , Friedrich B.
Published: September 2010

Schlacken können nicht länger als Abfallprodukt betrachtet werden, sind aber selten als Rohstoff werthaltiger Metalle anerkannt. Am Beispiel von Kupfer wird gezeigt, wie eine Abreicherung von Produktionsschlacken erfolgen kann. Durch eine verbesserte Einbringungsmethode von Reduktionsmitteln und eine magnetische Rührung der Schmelze mit einem verbesserten Absetzverhalten werden niedrigere Endgehalte in den Produktionsschlacken erzielt.
Ressource Effiency in Potash and Rock Salt Mining
Authors: Spachtholz F. X.
Published: September 2010

Die Rohstoffwirtschaft ist für die Volkswirtschaft von essentieller Bedeutung. Der deutsche Bergbau gilt dank des Einsatzes modernster Technologien und Know how als äußerst ressourceneffizient. Die Gewinnungsbetriebe der K+S Gruppe bauen weltweit vor allem Kali‐ und Magnesiumsalze sowie Steinsalz ab. Dabei wird besonderer Wert auf eine nachhaltige Nutzung der Lagerstätten gelegt – nicht zuletzt um wettbewerbsfähig zu bleiben. Dazu werden ständig neue Technologien entwickelt, die Organisation optimiert und die Mitarbeiter weiterqualifiziert.
Studies on Ring‐Opening Polymerization of Chloromethyl Thiirane with Rare Earth Catalysts and Functional Resins Synthesized therewith
Authors: Shen Zhi‐Quan , Li Wei‐Shi , Sun Wei‐Lin , Zhang Yi‐Feng
Published: September 2010

Studies on ring‐opening polymerization of chloromethyl thiirane with rare earth catalysts and functional resins synthesized therewith were reviewed.
A Novel Composite Electrode of Photocatalyst‐TiO2/C Loading on the Surface of the Air (Oxygen) Electrode
Authors: Wang Yu‐Ling , Cai Nai‐Cai , Wang Ya‐Ping , Zhong Jia‐Sheng
Published: September 2010

The methods for preparing the H2O2 generating air (oxygen) electrode and the composite electrode of photocatalyst‐TiO2/C loading on the surface of the air (oxygen) electrode were introduced. In the case of the composite electrode, the current efficiency of electro‐generated H2O2 is higher than 80% (J ≤ 15 mA/cm2). The degradation of aniline was used as an example to measure the influence of the composite electrode and compared with the system in which the air (oxygen) electrode and the photocatalyst‐TiO2 were separated. The results confirmed that the composite electrode played an active role on accelerating the degradation rate of aniline. According to the measurement of the polarization curves of composite electrode and TiO2 photo anode, and of the adsorbing amount of aniline on the surface of the composite electrode, the principle of descending the recombination rate of photo‐generated electron and hole and of enhancing the oxidation rate of organic molecule was described. The mechanism about the degradation of aniline was also discussed.
Vapor Pressure Osmometry and Its Applications in the Osmotic Coefficients Determination of the Aqueous Monomer Glycol and Polymer Polyethylene Glycol Solutions at Various Temperature
Authors: Gao Zuo‐Ntag , Li Jin‐Fu , Wen Xiao‐Lin
Published: September 2010

Based on the principle and calibration of vapor pressure osmometer and its application in the thermodynamics of the aqueous solutions, the results on aqueous solutions of monomer glycol, PEG200, PEG400, PEG1500 and PEG2000, over the different concentration range at various temperatures were reported. Using a linear least‐square fitting routing, the osmotic coefficients were fitted by a simple polynomial equation. It was found that the relationship between the molar osmotic coefficients (ϕ) and the molar concentration (c) of the solutions are in a quite good agreement with the fitted polynomial equation at various temperatures over the different concentration range. The experimental results also show that over the studied concentration range and at various temperatures, the concentration dependence of the molar osmotic coefficients of the aqueous solution systems with the solutes of PEG200, PEG400, PEG1500 and PEG2000 are totally presented in a rising trend, and their temperature dependence of the osmotic coefficients of the aqueous solution systems of the molar concentration exhibits their own regularities, respectively. The aqueous glycol solution system exhibits the properties of the dilute solution.
Synthesis, Structural Characterization and Reactivity of Two New Triangular Molybdenum Cluster Compounds: Mo3Te7‐[S2CN(CH2CH2OH)2]3I and Mo3Te4Y3[S2P(iPrO)2]3I (Y3 = 1.43Te + 1.57S)
Authors: Yang Wen‐Bin , Lin Xiang , Lu Can‐Zhong , Zhuang Hong‐Hui
Published: September 2010

Two triangular molybdenum‐tellurium clusters, Mo3Te7‐[S2CN (CH2CH2OH2]3I (1) and Mo3Te4Y3[S2P(iPrO)2]3I (Y3 = 1. 43Te+ 1.57S) (2), were obtained from the reaction of K · HOdtc [HOdtc = S2CN(CH2CH2OH)2] or K·iPr2dtp (iPr2dtp = S2P[OCH(CH3)2]2) with a mixed product of elements Mo, Te(S) and I2 at high temperature. The structures of the two compounds were determined by X‐ray crystallography study. Crystal data are, (1): monoclinic, P21/n, a = 1.6256(3), b = 1.3264(2), c = 1.8808(4) nm, β=96.923°, V = 4.025.9 (14) nm3, Dcal = 3.050g·cm‐3, Z = 4, and (2): monoclinic, P21/n, a = 1.4564(2), b = 2.3917(4), c = 1.5094(3) nm, β = 114.35(2)°, V = 4.0259(14) nm3, Dcal = 2.449 g·cm−3 and Z = 4. Single crystal analyses show that 1 consists of discrete Mo3Te7[S2CN(CH2CH2OH)2]3I connected into three‐dimensional framework via hydrogen bonds, while 2 forms a linear chain via Te(S)—I interaction.
Layer‐by‐layer Multilayer Films Self‐assembled from a Rare‐earth‐containing Poly‐oxometalate Na9[Eu(W5O18)2] and Poly (allylamine hydrochloride) and Their Photoluminescent Properties
Authors: Wang Yong‐Hui , Wang Xin‐Long , Hu Chang‐Wen , Wang En‐Bo , Shi Chun‐Shan
Published: September 2010

Ultrathin multilayer films of a rare‐earth‐containing polyoxometalate Na9[Eu(W5O18)2] (EW) and poly(allylamine hydrochloride) (PAH) have been prepared by layer‐by‐layer self‐assembly from dilute aqueous solutions. The fabrication process of the EW/PAH multilayer films was followed by UV‐vis spectroscopy and ellipsometry, which show that the deposition process is linear and highly reproducible from layer to layer. An average EW/PAH bilayer thickness of ca. 2.1 nm was determined by ellipsometry. In addition, the scanning electron microscopy (SEM) image of the EW/PAH film indicates that the film surface is relatively uniform and smooth. The photoluminescent properties of these films were also investigated by fluorescence spectroscopy.
Crystal Structure and Luminescence of a Europium Coordination Polymer { [Eu(p‐MOBA)3 · 2H2O] · 0.5H2O · 0.5 (4, 4′‐bipy) } ∞
Authors: Li Xia , Jin Lin‐Pei , Wan Yong‐Hong , Lu Shao‐Zhe , Zhang Jia‐Hua
Published: September 2010

The structure of the complex { [Eu (p‐MOBA)3 · 2H2O] · 0.5H2O·0.5(4,4′‐bipy)}∞ (p‐MOBA: p‐methoxybenzoate, 4,4′‐bipy: 4,4′‐bipyridine) was determined by single crystal X‐ray diffraction study. Each europium atom is coordinated with two oxygen atoms of the chelated carboxyl group, four oxygen atoms of the four bidentate bridging carboxylate groups and two oxygen atoms of two water molecules, forming an infinite polymeric chain structure. Excitation and luminescence spectra were observed at 77 K. The high resolution spectrum of the complex shows that the europium ion site in the crystal has low symmetry. The complex displays intense luminescence which may be related to the p‐MOBA ligand and the polymeric coordination.
Microdetermination of Proteins by Enhanced Rayleigh Light Scattering Spectroscopy with Thorin
Authors: Zhao Feng‐Lin , Li Ke‐An , Chen Li‐Hua
Published: September 2010

In acidic solution, thorin (2‐(2‐hydroxy‐3.6‐disulfo‐1‐naphthyl)‐azo‐phenylarsenic acid sodium salt) can be bound with protein and aggregated to form large particle which displays a very strong rayleigh light scattering (RLS). The effects of pH, thorin concentration, detergent and ionic strength on binding reaction have been studied. The interference of coexisting substances was checked. The Scatchard plots for reaction between thorin and bovine serum albumin (BSA) were constructed and the association constant of thorin‐BSA was obtained, it is 5.26 × 105 L/mol, the maximum binding number is 7. RLS intensity is well proportional to the concentrations of 2.0–14.0 μg/ mL for human serum albumin (HSA), 1.8–14.7 μg/mL for BSA and 1.8–14.6 μg/mL for γ‐globulin (γ‐G). The detection limits (3ϱ) are 54.1 ng/mL for HSA, 52.0 ng/mL for BSA and 51.8 ng/mL for γ‐G, respectively. The relative standard deviation is 2.4% for BSA, 3.2% for HSA and 4.1% for γ‐G. The human serum samples were measured satisfactorily by using this method.
Cupric Hexacyanoferrate Nanoparticle Modified Carbon Ceramic Composite Electrodes
Authors: Wang Peng , Zhu Guo‐Yi
Published: September 2010

Graphite powder‐supported cupric hexacyanoferrate (CuHCF) nanoparticles were dispersed into methyltrimethoxysilane‐based gels to produce a conducting carbon ceramic composite, which was used as electrode material to fabricate surface‐renewable CuHCF‐modified electrodes. Electrochemical behavior of the CuHCF‐modified carbon ceramic composite electrodes was characterized using cyclic and square‐wave voltammetry. Cyclic voltammograms at various scan rates indicated that peak currents were surface‐confined at low scan rates. In the presence of glutathione, a dear electrocatalytic response was observed at the CuHCF‐modified composite electrodes. In addition, the electrodes exhibited a distinct advantage of reproducible surface‐renewal by simple mechanical polishing on emery paper, as well as ease of preparation, and good chemical and mechanical stability in a flowing stream.
Rearrangement of 2‐Benzothiazolylthioacetyl Hydrazide in Ethanol Solution of Potassium Hydroxide: Synthesis of s‐Triazolo[3,4‐b]benzothiazol‐3‐thiol and Its Derivatives
Authors: Zhang Yan , Hui Xin‐Ping , Dai Chao‐Feng , Zhang Zi‐Yi , Xu Peng‐Fei
Published: September 2010

A novel rearrangement reaction about 2‐benzothiazolyl‐thioacetyl hydrazide (1) to produce s‐triazolo[3,4‐b]benzothiazol‐3‐thiol (3) in the presence of KOH and CS2 was described. Other way to synthesize 3 from 2‐benzothiazolyl‐hydrazine (2) under the same condition was compared and the Mannich reaction of compound 3 was reported too. Their structures were established by elemental analyses, IR, 1H NMR and MS spectra.
Separation and Structure of Chiral S‐Malic Acid Hydrate
Authors: Me Jing‐Jing , Xu Duan‐Jun , Wu Jing‐Yun , Chiang Michael Y.
Published: September 2010

Crystals of the chiral malic acid hydrate (C4H6O3 · H2O) were unexpectedly obtained from an ethanol/water solution containing racemic D, L‐malic acid and L‐asparagine. The crystal belongs to orthorhombic space group P212121 with cell dimensions of a = 0.5576(1), b = 0.9818(2), c = 1.1793(2) nm, V = 0.6455(2) nm3, Z = 4, μ(Mo Ka =0.152 mm−1, F(000) = 320, Dc= 1.565 g·cm−3, R = 0.051, wR = 0.136 for 657 observed reflections [I < 2σ(I)]. The significant difference in bond distances for carboxyl groups suggests that the crystal consist of malate anion and protonized crystalline water. This is a report for direct separation of racemic mixture, i.e., without the formation of a molecular complex of raceme with a chiral separating reagent.
New Host Molecules with Imidazoliums as Functional Arms: Syntheses and Anion Recognition
Authors: Yuan Yi , Jiang Zong‐Lin , Gao Ge , Zhang Guo‐Lin , You Jing‐Song , Xie Ru‐Gang
Published: September 2010

The bridged tri‐imidazoliums 3 · 3X− — 5 · 3X− (X− = PF6−, Br−, I−) and bis‐imidazoliums 6 × 2PF6− were synthesized by N‐quaternization of imidazole derivative 1 in acetonitrile under reflux. UV spectroscopic titration experiments showed that the halide salts and hexafluorophosphate salts of these imidazoliums exhibited good recognition toward anions in water and in acetonitrile, respectively.
Sequence Pattern Correlation of Amino Acid in Collision‐induced Dissociation Electrospray Ionization Mass Spectrometry
Authors: Song Hao‐Wei , Yue Gui‐Hua , Lu Yu , Yang Peng‐Yuan , Wang Hong‐Hai
Published: September 2010

A novel approach of sequence pattern correlation has been applied to predict an expected amino acid sequence from CID ESI‐MS spectra. The proposed approach deduces sequence patterns with no help from known protein database such that it is useful to identify an unknown peptide or new protein. The algorithm applies a cross‐correlation to match an experimental CID spectrum with predicted sequence pattern generated from fragmentation information. The fragmentation knowledge of both y‐series and other non y‐series are utilized to generate the predicted sequence patterns. In contrast to the normal de novo approach, the proposed approach is insensitive to mass tolerance and non‐susceptive to spectral integrality with no need for selection of a starting point.
Synthesis and Characterization of Ferrocene‐Containing Liquid Crystalline Materials with a Bromo‐phenyl Moiety†
Authors: Zhao Ke‐Qing , Hu Ping , Xu Hong‐Bo , Zhang Liang‐Fu
Published: September 2010

Ten ferrocene‐containing liquid crystalline materials, p‐FcC6H4CO2C6H4N=CHC6H4O2CC6H3BrOCnH2n+1 (type I) and p‐FcC6H4N=CHC6H4O2CC6H3BrOCnH2n+1 (type II), were synthesized by condensation reactions of two ferrocene‐substituted amines, p‐FcC6H4CO2C6H4NH2 (4) and p‐FcC6H4NH2(5) (Fc: ferrocenyl) with five bromo‐substituted benzaldehydes (3) (H2n+1CnOC6H3BrCOOC6H4CHO, n=2, 4, 6, 8 and 10). Their mesogenic behaviors were studied by hot‐stage polarized optical microscopy and differential scanning calorimetry. The effects of structure (rigid core, terminal chain length) on the phase transition behaviors were discussed.
Synthesis and Novel Properties of Alkyl Thiophosphoramidate Derivatives of Nucleosides
Authors: Miao Zhl‐Wei , Fu Hua , Tu Guang‐Zhong , Liu Hai , Bo Han , Zhao Yu‐Fen
Published: September 2010

Novel alkyl thiophosphoramidate derivatives of nucleoside analogues (5) have been prepared by phosphochloridothioate chemistry. O‐Isopropyl 2′, 3′‐O‐isopropylidene uridine‐5′‐yl N‐thiophosphoryl threonine and serine methyl esters (Sa and 5b) underwent the intramolecular catalyzed hydrolysis reaction.
Study and Application of Polarographic Catalytic Wave of Chlordiazepoxide in the Presence of Persulfate
Authors: Guo Wei , Lin Hong , Liu Li‐Min , Guo Zhi‐An , Song Jun‐Feng
Published: September 2010

Polarographic catalytic wave of chlordiazepoxide in the presence of K2S2O8 was studied in aqueous and DMF/H2O mixed solutions. The results showed that a single reduction wave in alkaline medium was the reduction of the N = C bond in 1,2‐position of chlordiazepoxide via an intermediate free radical in two one‐electron successive additions. When K2S2O8 was present, the free radical of the N = C bond was oxidized to regenerate the original, producing a parallel catalytic wave of chlordiazepoxide. It was determined that the apparent rate constant kf of the oxidation reaction was 3.2 × 103 mol−1·L·s−1. Using the catalytic wave the trace of chlordiazepoxide can be determined by linear‐potential scan polarography. In NH3/NH4Cl (pH 10.2 ± 0.1, 0.12 mol/L)/K2S2O8(0.016 mol/L) supporting electrolyte, the second‐order derivative peak current of the catalytic wave was rectilinear to chlordiazepoxide concentration in the range of 3.20 × 10−8‐1.60 × 10−7, 1.60 × 10−7‐1.44×10−6 and 1.44×10−6‐1.44x 10−5 mol/L, respectively. The limit of detection was 9.0×10−9 mol/L.
Interaction of Fluorocarbon Containing Hydrophobically Modified Polyelectrolyte with Nonionic Surfactants
Authors: Guo Jin‐Feng , Zhuang Dong‐Qing , Zhou Hui , Zhang Yun‐Xiang
Published: September 2010

The interaction of fluorocarbon containing hydrophobically modified polyelectrolyte (FMPAANa) with two kinds of non‐ionic surfactants (hydrogenated and fluorinated) in a semidilute (0.5 wt%) aqueous solution had been studied by rheological measurements. Association behavior was found in both systems. The hydrophobic interaction of FMPAANa with fluorinated surfactant (FC171) is much stronger than that with hydrogenated surfactant (NP7.5) at low surfactant concentrations. The interaction is strengthened by surfactants being added for the density of active junctions increased. Whereas distinct phenomena for FC171 and NP7.5 start to be found as the surfactants added over their respective certain concentration. The interaction of polyelectrolyte with fluorinated surfactant increases dramatically while that with hydrogenated surfactant decreases.
A Novel Approach to Synthesis of α, β‐Unsaturated Ketones
Authors: Wang Lan‐Ying , Hu Zhi‐Biao , Shi Zhen
Published: September 2010

A new approach to the synthesis of α, β‐unsaturated ketones from 1,2,3‐trimethyl benzimidazolium salt via the condensation reaction with aldehydes followed by the addition reaction of Grignard reagents with quaternary C=N bond was provided.
Synthesis and Structure of 1‐Cyclopentylindenyl Lanthanide(II) Complexes and Their Catalytic Behavior for Polymerization of Acrylonitrile
Authors: Qi Min‐Hua , Shen Qi , Gong Xin‐Qiang , Shen Zhi‐Quan , Weng Lin‐Hong
Published: September 2010

The reaction between K(1‐C5H9C9H6) and anhydrous LnCl3(Ln=Sm, Yb) in the molar ratio of 2:1 in THF with subsequent treatment by Na‐K alloy afforded (1‐C5H9C9H6)2Ln‐(THF)n(Ln=Sm,n=1; Ln=Yb,n=2), while the reaction of Sml2with K(1‐C5H9C9H6) in the molar ratio of 1:2 in THF gave the anionic complex K(1‐C5H9C9H6)3Sm(THF)3. The X‐ray structure of (1‐C5H9C9H6)2Yb(THF)2showed that central metal Yb is coordinated by two cyclopentadienyl rings of 1‐cyclopentylindenyls and two oxygen atoms from two tetrahydrofuran molecules to form pseudo‐tetrahedral coordinate geometry. All these complexes are active for the polymerization of acrylonitrile.
Effects of Samarium on the Properties of the Anodic Pb(II) Oxides Film Formed on Pb in Sulfuric Acid Solution
Authors: Liu Hou‐Tian , Yang Chun‐Xiao , Zhang Xin‐Hua , Zhou Yan‐Bao , Zhou Wei‐Fang
Published: September 2010

The effects of samarium on the properties of the anodic Pb(II) oxides films formed on lead at 0.9 V (vs. Hg/Hg2SO4) in 4.5 mol/L H2SO4 solution were studied using linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and scanning electron micrographs (SEM). The experimental results show that adding Sm to lead metal can inhibit the growth of the Pb(II) oxides film effectively, and reduce the resistance of the PbO oxides film obviously. The addition of Sm increases the porosity of the anodic film, which may cause the increase of the ionic conductance produced by the interstitial liquid among the PbO particles in the film and lead to the decrease of the resistance of the anodic film.
Crystal Structure and EPR Spectra of cis‐Dioxo‐molybdenum(V) Complex with o‐Aminophenol
Authors: Lu Xiao‐Ming , Lu Jing‐Fen , Mao Xi‐An
Published: September 2010

The paramagnetic cis‐dioxo‐molybdenum(V) complex, [NH2CH2CH2NH3]3[MovO2(HNC6H4O)2] was obtained by the reaction of tetra‐butyl ammonium β‐octamolybdate with o‐aminophenol and ethylenediamine in the mixed solvent of CH3OH and CH3CN, and characterized by IR, NMR, EPR spectroscopy and X‐ray diffraction analysis. The determination of single crystal X‐ray analysis revealed that the central Mov ion metal center exhibits distorted octahedral coordination with cis‐dioxo o‐aminophenol. The EPR spectra of both the complex and flavoenzyme show similarly. Thus it suggests that the complex anion [MovO2(HNC6H4O)2]3‐ and flavoenzyme have related structure feature.
Sensitivity‐enhanced Experiments for the Measurement of J and Dipolar Coupling Constants
Authors: Lin Dong‐Hai , Liao Xin‐Li
Published: September 2010

A sensitivity‐enhanced IPAP NMR experiment was described in this paper, which separates the 1H‐15N doublets into two different spectra to alleviate the problem of resonance overlaps and achieve the accurate measurement of J and residual dipolar coupling constants in proteins. This experiment offered 20%–60% sensitivity enhancement over the original IPAP experiment, and therefore produced more measurable resonances. Pulsed field gradient was used for coherence selection. Water‐flip‐back approach was used for water suppression. The sensitivity‐enhanced IPAP experiment was employed in the measurement of 1JNH and 1DNH constants of the protein UBC9.
Theoretical Study on Intermolecular Interactions and Thermodynamic Properties of Dimethylnitroamine Clusters
Authors: Ju Xue‐Hai , Xiao He‐Ming , Tan Jin‐Zhi
Published: September 2010

Ab initio SCF and Møller‐Plesset correlation correction methods in combination with counterpoise procedure for BSSE correction have been applied to the theoretical studying of dimethylnitroamine and its dimers and trimers. Three optimized stable dimers and two trimers have been obtained. The corrected binding energies of the most stable dimer and trimer were predicted to be − 24.68 kJ/mol and − 47.27 kJ/mol, respectively at the MP2/6‐31G*//F/6‐31G* level. The proportion of correlated interaction energies to their total interaction energies for all clusters was at least 29.3 percent, and the BSSE of ΔE(MP2) was at least 10.0 kJ/mol. Dispersion and/or electrostatic force were dominant in all clusters. There exist cooperative effects in both the chain and the cyclic trimers. The vibrational frequencies associated with N—O stretches or wags exhibit slight red shifts, but the modes associated with the motion of hydrogen atoms of the methyl group show somewhat blue shifts with respect to those of monomer. Thermodynamic properties of dimethylnitroamine and its clusters at different temperatures have been calculated on the basis of vibrational analyses. The changes of the Gibbs free energies for the aggregation from monomer to the most stable dimer and trimer were predicted to be 14.37 kJ/mol and 30.40 kJ/mol, respectively, at 1 atm and 298.15 K.