bluuebunny/crossref_metadata_2025 huggingface dataset:
Supported Ionic Liquid Phase Containing Palladium Nanoparticles on Functionalized Multiwalled Carbon Nanotubes: Catalytic Materials for Sequential Heck Coupling/Hydrogenation Process
Authors: Rodríguez‐Pérez Laura , Pradel Christian , Serp Philippe , Gómez Montserrat , Teuma Emmanuelle
Published: January 2011

Well‐dispersed palladium nanoparticles have been prepared in ionic liquids in the presence of 4‐(3‐phenylpropyl)pyridine under dihydrogen. These nanoparticles are immobilized onto multiwalled carbon nanotubes modified with imidazolium moieties (fCNTs). The resulting catalytic materials are tested in hydrogenation and Heck coupling reactions. Analogous Pd nanoparticles dispersed in ionic liquids have also been immobilized on silica for comparative purposes. fCNTs are found to be the best support for both hydrogenation and Heck coupling, being recycled up to four times without significant activity loss. Palladium nanoparticles supported on fCNTs are used as a single catalytic precursor for the CC coupling/ hydrogenation sequential process using [EMI][HP(O)2OMe] (EMI=1‐ethyl‐3‐methyl imidazolium) ionic liquid phase without addition of supplementary base.
Confirmation of Chirality in Homogeneous and Heterogeneous Salen‐Based Catalysts
Authors: McCue Alan J. , Wells Richard P. K. , Anderson James A.
Published: January 2011

The extent to which diastereomeric excess (de) of epoxide products is influenced by the structure of the chiral olefin substrate has been assessed for two enantiomers of limonene and two enantiomers of pinene and using a number of homogeneous and heterogeneous [Mn(salen)]‐based catalysts, based on both chiral and achiral structures. No evidence was obtained to suggest that double asymmetric induction took place, but instead results indicate that the stereoselectivity of the epoxide product was governed wholly by the substrate. Results call into question the use of such substrates alone in drawing conclusions regarding the nature of presumed stereogenic centers in such catalysts.
Copper‐Catalyzed Trifluoromethylation of Aryl Iodides with Potassium (Trifluoromethyl)trimethoxyborate
Authors: Knauber Thomas , Arikan Fatih , Röschenthaler Gerd‐Volker , Gooßen Lukas J.
Published: January 2011

Potassium (trifluoromethyl)trimethoxyborate is introduced as a new source of CF3 nucleophiles in copper‐catalyzed trifluoromethylation reactions. The crystalline salt is stable on storage, easy to handle, and can be obtained in near‐quantitative yields simply by mixing B(OMe)3, CF3SiMe3, and KF. The trifluoromethylation reagent allows the conversion of various aryl iodides into the corresponding benzotrifluorides in high yields under mild, base‐free conditions in the presence of catalytic quantities of a CuI/1,10‐phenanthroline complex.
Total Synthesis of cyclo‐Mumbaistatin Analogues through Anionic Homo‐Fries Rearrangement
Authors: Neufeind Stefan , Hülsken Nils , Neudörfl Jörg‐Martin , Schlörer Nils , Schmalz Hans‐Günther
Published: January 2011

The structurally unique polyketide mumbaistatin is the strongest naturally occurring inhibitor of glucose‐6‐phosphate translocase‐1 (G6P‐T1), which is a promising target for drugs against type‐2 diabetes mellitus and angiogenic processes associated with brain tumor development. Despite its high relevance, mumbaistatin has so far withstood all attempts towards its total synthesis. In the present study an efficient total synthesis of a deoxy‐mumbaistatin analogue containing the complete carbon skeleton and a spirolactone motif closely resembling the natural product in its cyclized form was elaborated. Key steps of the synthesis are a Diels–Alder cycloaddition for the construction of the fully functionalized anthraquinone moiety and an anionic homo‐Fries rearrangement to build up the tetra‐ortho‐substituted benzophenone core motif, from which a spiroketal lactone forms in a spontaneous process. The elaborated strategy opens an entry to a variety of new analogs of mumbaistatin and cyclo‐mumbaistatin and may be exploited for the total synthesis of the natural product itself in the future.
Multicomponent Synthesis of Chiral Sulfinimines
Authors: Roe Caroline , Hobbs Heather , Stockman Robert A.
Published: January 2011

Two oxathiozolidine‐S‐oxide templates have been developed and used in a four‐component coupling protocol for the synthesis of a wide range of chiral sulfinimines in high enantiomeric excesses. The templates can be synthesized from cheap commodity chemicals in three steps in high yields. Furthermore the template is easily recovered in high yields for recycling.
ChemInform Abstract: The High‐Pressure Phase of MgB2C2.
Authors: Woerle Michael , Fischbach Urs , Widmer Daniel , Krumeich Frank , Nesper Reinhard , Evers Juergen , Stalder Roland , Ulmer Peter
Published: January 2011

The high pressure phase of title is prepared by heating the ambient‐pressure form of MgB2C2 at 9 GPa and 1300 °C for 24 h.
ChemInform Abstract: Structure and Bonding of γ‐B28: Is the High Pressure Form of Elemental Boron Ionic?
Authors: Haeussermann Ulrich , Mikhaylushkin Arkady S.
Published: January 2011

The recently characterized crystal structure of metastable γ‐B28 is analyzed from a crystal chemical point of view and compared with that of α‐B12, the simplest boron modification.
ChemInform Abstract: A Facile Route for the Synthesis of Polycationic Tellurium Cluster Compounds: Synthesis in Ionic Liquid Media and Characterization by Single‐Crystal X‐Ray Crystallography and Magnetic Susceptibility.
Authors: Ahmed Ejaz , Ahrens Eike , Heise Martin , Ruck Michael
Published: January 2011

As revealed by single crystal XRD compound (III) crystallizes in the monoclinic space group P21/n with Z = 4, (VI) in the orthorhombic space group Pbca with Z = 4, and (VIII) in the monoclinic space group P21/c with Z = 8.
ChemInform Abstract: Highly Uniform and Monodisperse Gd2O2S:Ln3+ (Ln: Eu, Tb) Submicrospheres: Solvothermal Synthesis and Luminescence Properties.
Authors: Song Yanhua , You Hongpeng , Huang Yeju , Yang Mei , Zheng Yuhua , Zhang Lihui , Guo Ning
Published: January 2011

Well dispersed and homogenous submicrospheres of Gd2O2S:Ln3+ (Ln: Eu, Tb) are prepared by mild solvothermal reaction of the corresponding lanthanide nitrates with thiourea in the presence of poly(vinylpyrrolidine) (PVP K30) in glycol/EtOH (autoclave, 200 °C, 24 h) followed by heat treatment at 600—800 °C (2 h).
ChemInform Abstract: Crystal Structures of the Europium and Yttrium Hydroxychromates Eu(OH)(CrO4) and Y(OH)(CrO4); Structural Evolution as a Function of the Ln3+ Ionic Radius.
Authors: Phanon Delphine , Gautier‐Luneau Isabelle
Published: January 2011

Title compounds (V) and (VIII) crystallize isostructurally in the monoclinic space group P21/n with Z = 8 (single crystal XRD).
ChemInform Abstract: Three‐Dimensional Architectures Based on Lanthanide‐Substituted Double‐Keggin‐Type Polyoxomethalates and Lanthanide Cations or Lanthanide‐Organic Complexes.
Authors: An Haiyan , Han Zhengbo , Xu Tieqi
Published: January 2011

The structures of the new title compounds (III) (monoclinic, space group P21/c, Z = 2) and (IV) (P21/c, Z = 2) as well as of (VI) (triclinic, P$\bar 1$, Z = 1) are determined by single crystal XRD.
ChemInform Abstract: Hydrazine‐Hydrothermal Method to Synthesize Three‐Dimensional Chalcogenide Framework for Photocatalytic Hydrogen Generation.
Authors: Zhang Qichun , et al. et al.
Published: January 2011

Dark‐red crystals of Mn2Sb2S5 (N2H4)3 are synthesized by reaction of Sb2S3, Mn, and sulfur in N2H4·H2O (autoclave, 140 °C, 7 d, 70% yield).
ChemInform Abstract: (Ba6O)(ReN3)2: Synthesis, Crystal Structure and Physical Properties.
Authors: Schmidt C. L. , dinnebier Robert , Jansen Martin
Published: January 2011

The title compound is synthesized from a 3:1 mixture of Ba and Re metals (flowing N2, 850 °C, 50 h).
ChemInform Abstract: Crystal Structure and Magnetic Properties of Na2NiII(HPO3)2.
Authors: Maalej Wassim , Vilminot Serge , Elaoud Zakaria , Mhiri Tahar , Kurmoo Mohamedally
Published: January 2011

Light yellow‐green crystals of the title compound are synthesized by solvothermal reaction of NiCl2, NaOH, H3PO3, and L‐phenylalanine in H2O/MeOH (1:4) (pH ≈3.5, autoclave, 150 °C, 5 d).
ChemInform Abstract: Isoquinoline‐Based Chiral Monodentate N‐Heterocyclic Carbenes.
Authors: Hirsch‐Weil Dimitri , Abboud Khalil A. , Hong Sukwon
Published: January 2011

A novel C1‐symmetric “mono”‐isoquinoline based chiral NHC ligand (MIQ) is synthesized and successfully applied as catalyst for the conjugate borylation of a variety of α,β‐unsaturated carbonyl compounds.
ChemInform Abstract: Development of 5‐Silylethynyl‐1,3‐dioxolan‐4‐one as a New Prochiral Template for Asymmetric Phase‐Transfer Catalysis.
Authors: Hashimoto Takuya , Fukumoto Kazuhiro , Abe Naoyuki , Sakata Kazuki , Maruoka Keiji
Published: January 2011

The asymmetric alkylation of dioxolanone (V) in the presence of axially chiral quaternary ammonium salt (BNQ) as phase‐transfer catalyst leads to α‐chiral acetylenes (VII) with good enantioselectivities.
ChemInform Abstract: Enantioselective Synthesis of Amines: General, Efficient Iron‐Catalyzed Asymmetric Transfer Hydrogenation of Imines.
Authors: Zhou Shaolin , Fleischer Steffen , Junge Kathrin , Das Shoubhik , Addis Daniele , Beller Matthias
Published: January 2011

A variety of aromatic and aliphatic imines is smoothly hydrogenated in the presence of an iron—diphosphine catalyst to give the corresponding amines (II), (IV) or (VI) in good yields and high enantioselectivities (up to 98% e.e.).
ChemInform Abstract: Metal Phthalocyanine‐Catalyzed Addition of Polychlorine‐Containing Organic Compounds to C=C Bonds.
Authors: Ivanov A. V. , Maksimov A. Yu. , Tomilova L. G. , Zefirov N. S.
Published: January 2011

Copper as well as cobalt tetra(tert‐butyl)phthalocyanines are effective catalysts for the addition of polychlorine compounds to C=C double bonds.
ChemInform Abstract: Site‐Selective and Regioselective Diels—Alder Reaction of Allenyl Aryl Ethers.
Authors: Moghaddam Firouz Matloubi , Kiamehr Mostafa
Published: January 2011

The external double bond of allenyl aryl ethes (III) undergoes Diels‐Alder reaction with electron‐rich 1,3‐dienes [‐< (VII)/(VIII)], while the internal double bond of (III) undergoes Diels‐Alder reaction with electron‐deficient 1,3‐dienes as a dienophile [‐< (V)].
ChemInform Abstract: Cyclization of 1,3‐Dialkyl‐4,5‐bis(1‐thiosemicarbazido)imidazolidin‐2‐ones(thiones) with Aromatic Aldehydes.
Authors: Gazieva Galina A. , Vasilevskii Sergei V. , Belyakov Pavel A. , Nelyubina Yulia V. , Lubuzh Elena D. , Kravchenko Angelina N.
Published: January 2011

Cyclization of imidazolidinones, e.g. (I), in the presence of aldehydes (II) leads to products of type (III).
ChemInform Abstract: Scandium‐Catalyzed Propargylation of 1,3‐Diketones with Propargyl Alcohols Bearing Sulfur or Selenium Functional Groups: Useful Transformation to Furans and Pyrans.
Authors: Ohta Katsuki , Kobayashi Taira , Tanabe Genzoh , Muraoka Osamu , Yoshimatsu Mitsuhiro
Published: January 2011

The synthesis of propargylated 1,3‐diketones by Lewis‐acid catalytic reactions and their subsequent transformation into furans and pyrans are described.
ChemInform Abstract: A Reductive‐Coupling Plus Nazarov Cyclization Sequence in the Asymmetric Synthesis of Five‐Membered Carbocycles.
Authors: Kerr Daniel J. , White Jonathan M. , Flynn Bernard L.
Published: January 2011

It provides an efficient, convergent, and highly stereoselective method to prepare cyclopentenones, indanones, and related compounds.
ChemInform Abstract: Efficient Iodine‐Mediated Beckmann Rearrangement of Ketoximes to Amides under Mild Neutral Conditions.
Authors: Ganguly Nemai C. , Mondal Pallab
Published: January 2011

This greener procedure for the Beckmann rearrangement is mediated by iodine as a nonmetallic Lewis acid.
ChemInform Abstract: Water Mediated Trapping of Active Methylene Intermediates Generated by IBX‐Induced Oxidation of Baylis—Hillman Adducts with Nucleophiles.
Authors: Tan Jia‐Neng , Li Haoquan , Gu Yanlong
Published: January 2011

IBX induced oxidation of Baylis‐Hillman adducts is suggested as an alternative way to methylenylation of β‐dicarbonyl compounds with formaldehyde for generation of active methylene intermediates.
ChemInform Abstract: Gold‐Catalyzed Oxidative Coupling Reactions with Aryltrimethylsilanes.
Authors: Brenzovich William E. Jr. , Brazeau Jean‐Francois , Toste F. Dean
Published: January 2011

The addition occurs selectively at the less electron‐deficient olefin [cf.(VIIb)].
ChemInform Abstract: Polyfluorination Using IF5.
Authors: Fukuhara Tadahito , Hara Shoji
Published: January 2011

Various polyfluorinated compounds bearing 3 to 6 fluorine atoms can be prepared selectively by successive fluorination of thioethers with IF5, Friedel—Crafts arylation, and desulfurizing fluorination with IF5.
ChemInform Abstract: Highly Efficient and Practical Pyrrolidine—Camphor‐Derived Organocatalysts for the Direct α‐Amination of Aldehydes.
Authors: Liu Pang‐Min , Magar Dhananjay R. , Chen Kwunmin
Published: January 2011

Asymmetric α‐amination of a range of aldehydes is successfully achieved in the presence of organocatalysts containing pyrrolidine and camphor subunits tethered via sulfone or sulfonamide functionality, e.g. PCSA, PCS (in parts published previously).
ChemInform Abstract: Highly Enantioselective Michael Addition of Acetone to Nitro Olefins Catalyzed by Chiral Bifunctional Primary Amine‐Thiophosphoramide Catalyst.
Authors: Lu Aidang , Liu Tao , Wu Ronghua , Wang Youming , Zhou Zhenghong , Wu Guiping , Fang Jianxin , Tang Chuchi
Published: January 2011

The title bifunctional organocatalyst promotes the Michael addition of both alkyl and aryl nitro olefins to acetone and cyclopentanone; however, no reactions are observed with cyclohexanone.
ChemInform Abstract: Electrocarboxylation of Carbon Dioxide with Polycyclic Aromatic Hydrocarbons Using Ni as the Cathode.
Authors: Yuan Gaoqing , Li Liuguan , Jiang Huanfeng , Qi Chaorong , Xie Fengchun
Published: January 2011

Using Ni cathode and Al sacrificial anode, the stereoselective electrocarboxylation of polycyclic aromatic hydrocarbons with carbon dioxide can be successfully performed in an undivided cell.
ChemInform Abstract: Cu(II)‐Catalyzed Carboxylative Coupling of Terminal Alkynes, Allyl Chlorides, and CO2.
Authors: Zhang Wen‐Zhen , Li Wen‐Jie , Zhang Xiao , Zhou Hui , Lu Xiao‐Bing
Published: January 2011

The heteroaryl‐substituted alkyne (Id) reacts only with moderate yield and a very low catalyst recovery (42%).
ChemInform Abstract: Benzotriazol‐1‐yl‐sulfonyl Azide for Diazotransfer and Preparation of Azidoacylbenzotriazoles.
Authors: Katritzky Alan R. , El Khatib Mirna , Bol'shakov Oleg , Khelashvili Levan , Steel Peter J.
Published: January 2011

The azide allows convenient and effective access to various diazo compounds and a number of azides including α‐azido acids, esters, thioesters, amides, and peptides.
ChemInform Abstract: γ‐Oxygenation of α,β‐Unsaturated Esters by Vinylogous O‐Nitroso Mukaiyama Aldol Reaction.
Authors: Tian Guo‐Qiang , Yang Jiong , Rosa‐Perez Kellymar
Published: January 2011

The first example of the vinylogous O‐nitroso Mukaiyama aldol reaction is reported to proceed with the exclusive formation of γ‐oxygenated α,β‐unsaturated esters.
ChemInform Abstract: Single Isomer Trisubstituted Olefins Bearing Alkyl Groups.
Authors: Rajagopal Thivisha , Flynn Alison B. , Ogilvie William W.
Published: January 2011

A stereo‐ and regiospecific cross‐coupling of (E)‐configurated esters of type (I) with 9‐BBN derivatives (II) affords the desired olefins (III).
ChemInform Abstract: Sequential Organocatalytic Stetter and Michael‐Aldol Condensation Reaction: Asymmetric Synthesis of Fully Substituted Cyclopentenes via a [1 + 2 + 2] Annulation Strategy.
Authors: Hong Bor‐Cherng , Dange Nitin S. , Hsu Che‐Sheng , Liao Ju‐Hsiou
Published: January 2011

The method consists of the preparation of the β‐nitroketones using thiazolium catalyst [cf.
ChemInform Abstract: Copper‐Mediated Oxidative Trifluoromethylation of Boronic Acids.
Authors: Chu Lingling , Qing Feng‐Ling
Published: January 2011

The reaction is applied to a wide range of aryl‐ and alkenylboronic acids showing high functional group tolerance.
ChemInform Abstract: One‐Pot N‐Acylation and N‐Alkylation of o‐Nitroaniline with Saturated Hydrocarbons in the Presence of Carbon Monoxide.
Authors: Akhrem Irena S. , Avetisyan Dzhul'etta V. , Kagramanov Nikolai D. , Petrovskii Pavel V. , Mysova Nadezhda E.
Published: January 2011

The activity of the title hydrocarbons in alkylation and acylation reactions depends on the stability of the corresponding R+ and R‐CO+ cations.
ChemInform Abstract: First General Route to Substituted α‐Arylamino‐α′‐chloropropan‐2‐ones by Oxidation of N‐Protected Aminohalohydrins: The Importance of Disrupting Hydrogen Bond Networks.
Authors: Pace Vittorio , Cabrera Alvaro Cortes , Fernandez Maria , Sinisterra Jose V. , Alcantara Andres R.
Published: January 2011

The presence of a network of intra‐ and intermolecular hydrogen bonds in β‐arylamino alcohols inhibits their oxidation to ketones.
ChemInform Abstract: TBAF‐Promoted Dehydrobrominations of Vicinal Dibromides Having an Adjacent O‐Functional Group.
Authors: Kutsumura Noriki , Kubokawa Keisuke , Saito Takao
Published: January 2011

With 1.1 equiv.
ChemInform Abstract: Organocatalytic Preparation of Simple β‐Hydroxy and β‐Amino Esters: Low Catalyst Loadings and Gram‐Scale Synthesis.
Authors: Jiang Hao , Gschwend Bjoern , Albrecht Lukasz , Joergensen Karl Anker
Published: January 2011

One‐pot two‐step method, including proline‐catalyzed generation of the intermediate epoxide/aziridine and the consequent N‐heterocyclic carbene catalysis to yield the desired β‐hydroxy‐ or β‐amino esters.
ChemInform Abstract: Highly Effective Pd‐Catalyzed ortho Olefination of Acetanilides: Broad Substrate Scope and High Tolerability.
Authors: Kim Byung Seok , Jang Chungsik , Lee Dong Jin , Youn So Won
Published: January 2011

An effective Pd‐catalyzed ortho‐olefination of acetanilides tolerates many functional groups and is applicable to the electron‐deficient substrates.
ChemInform Abstract: Efficient Copper‐Catalyzed S‐Arylation of Thiols with Aryl Bromides and Chlorides.
Authors: Li Yaming , Li Xiaoying , Wang Huifeng , Chen Tao , Xie Yusheng
Published: January 2011

The copper‐catalyzed cross‐coupling reaction of aryl bromides and chlorides (I) with arylthiols (II) is especially effective for aryl bromides possessing electron‐donating groups, e.g. (Ia).
ChemInform Abstract: PhI(OAc)2/KI‐Mediated Reaction of Aryl Sulfinates with Alkenes, Alkynes, and α,β‐Unsaturated Carbonyl Compounds: Synthesis of Vinyl Sulfones and β‐Iodovinyl Sulfones.
Authors: Katrun Praewpan , Chiampanichayakul Supanimit , Korworapan Kanokwan , Pohmakotr Manat , Reutrakul Vichai , Jaipetch Thaworn , Kuhakarn Chutima
Published: January 2011

Title reaction proceeds under mild conditions for a wide range of terminal aromatic or aliphatic alkenes bearing electron‐donating or electron‐withdrawing substituents to give the corresponding vinyl sulfones, e.g. (III), (VII) or (IX), as E‐isomers in most cases [except for Z‐isomer (V) and isomeric mixture (XI)/(XII)].
ChemInform Abstract: Highly Effective Alternative Aryl Trihydroxyborate Salts for a Ligand‐Free, On‐Water Suzuki—Miyaura Coupling Reaction.
Authors: Basu Basudeb , Biswas Kinkar , Kundu Sekhar , Ghosh Sujit
Published: January 2011

Readily accessible and air‐stable sodium aryl trihydroxyborates are utilized as an alternative source of organoboron species in the ligand‐free Pd‐catalyzed title reaction.
ChemInform Abstract: A Direct Synthesis of Symmetrical (E,E)‐1,4‐Diaryl‐1,3‐butadienes by Wenkert Arylation of Thiophene.
Authors: Hintermann Lukas , Schmitz Marco , Chen Yun
Published: January 2011

By use of either trialkylphosphanes or N‐heterocyclic carbenes as ligands for the nickel‐catalyzed Wenkert reaction, the original method is improved.
ChemInform Abstract: Catalytic Alkynylation Coupling Reactions by Copper(II) Complex in Water and Its Applications to Domino Synthesis of 2‐Arylindoles.
Authors: Yu Lintao , Jiang Xiaofei , Wang Lixia , Li Zhengkai , Wu Di , Zhou Xiangge
Published: January 2011

An efficient catalytic system for the alkynylation of aryl iodides is presented, involving a water‐soluble Cu—sulfonatosalen complex.
ChemInform Abstract: Pd‐Catalyzed Three‐Component Coupling of N‐Tosylhydrazone, Terminal Alkyne, and Aryl Halide.
Authors: Zhou Lei , Ye Fei , Zhang Yan , Wang Jianbo
Published: January 2011

The present new method for the synthesis of benzhydryl acetylene derivatives tolerates a wide range of functional groups and is applicable to aromatic as well as aliphatic terminal acetylenes.
ChemInform Abstract: Trapping the π‐Allylpalladium Intermediate from Fulvene‐Derived Azabicyclic Olefin with Soft Nucleophiles.
Authors: Rajan Rani , John Jubi , Thulasi Sreeja , Joseph Nayana , Radhakrishnan K. V. , Sawant R. C.
Published: January 2011

Ring opening of the pentafulvene‐derived bicyclic hydrazines (I), (V), and (VII) with phenols (II) and active methylene compounds (VII) furnishes the disubstituted alkylidenecyclopentenes (III), (VI), and (VIII), resp., in satisfactory to very good yields.
ChemInform Abstract: Preparation of Aromatic Amines by Copper‐Catalyzed Coupling of Boronic Acids with Aqueous Ammonia.
Authors: Jiang Zhaoqiong , Wu Zhiqing , Wang Lixia , Wu Di , Zhou Xiangge
Published: January 2011

The environmentally friendly protocol operates without additional solvent under mild conditions.
ChemInform Abstract: Studies on Novel Synthetic Methodologies. Part 209. Friedel—Crafts Reactions of 2‐Naphthol with α‐Amido Sulfones and Conversion of the Products with Nucleophiles.
Authors: Das Biswanath , Reddy Cheruku Ravindra , Sindhu Chava , Sudhakar Chithaluri , Nagendra Siddavatam
Published: January 2011

Naphthol (I) undergoes indium‐catalyzed Friedel‐Crafts reaction with amido sulfones (II) to provide access to sulfonyl derivatives (III) in high yields.
ChemInform Abstract: A Simple Synthesis of 8‐Methoxy‐1‐tetralone.
Authors: Cabrera Elvia V. , Banerjee Ajoy K.
Published: January 2011

A convenient synthesis is shown with an easily and in large quantity producible starting material (I).
ChemInform Abstract: A General and Highly Efficient Method for the Construction of Aryl‐Substituted N‐Heteroarenes.
Authors: Liu Chun , Han Na , Song Xiaoxiao , Qiu Jieshan
Published: January 2011

A highly efficient method for the cross coupling of various hetaryl halides with arylboronic acids is presented.
ChemInform Abstract: Efficient Synthesis of Functionalized Aziridinium Salts.
Authors: Chong Hyun‐Soon , Song Hyun A. , Dadwal Mamta , Sun Xiang , Sin Inseok , Chen Yunwei
Published: January 2011

The authors revise the results reported in a previous paper [J.
ChemInform Abstract: Synthesis of 2‐Alkyl‐ and Aryl‐3‐ethoxycarbonyl‐2,5‐dihydrofurans Through Gold‐Catalyzed Intramolecular Hydroalkoxylation.
Authors: Eom Dahan , Kang Dongjin , Lee Phil Ho
Published: January 2011

It provides an efficient approach to 2,5‐dihydrofurans of type (II).
ChemInform Abstract: Catalyst‐Controlled Ring‐Opening Cycloisomerization Reactions of Cyclopropenyl Carboxylates for Highly Regioselective Synthesis of Different 2‐Alkoxyfurans.
Authors: Chen Jie , Ma Shengming
Published: January 2011

The protocol is developed for the cycloisomerization of the cyclopropenyl carboxylates or ketone to either 2‐alkoxy (or methyl)‐3,5‐ [cf.
ChemInform Abstract: 2‐Substituted Benzo[b]furans from (E)‐1,2‐Dichlorovinyl Ethers and Organoboron Reagents: Scope and Mechanistic Investigations into the One‐Pot Suzuki Coupling/Direct Arylation.
Authors: Geary Laina M. , Hultin Philip G.
Published: January 2011

Electron‐rich aryl dichlorovinyl ethers like (I), (Xa) and (Xc), obtained from phenols and trichloroethylene, readily undergo one‐pot Suzuki cross coupling—cyclization to give 2‐arylbenzofuran derivatives in good yields.
ChemInform Abstract: Sulfur‐Assisted Propargyl—Allyl Isomerizations and Intramolecular Cyclization for the Synthesis of Tricyclic Thiophene Derivatives.
Authors: Xu Guangyu , Chen Kaixiong , Zhou Hongwei
Published: January 2011

A metal‐free process for the cyclization is developed using DBU as the base.
ChemInform Abstract: A Facile Synthesis of Pyrazoles with Multi‐Point Structural Diversity by 1,3‐Dipolar Cycloaddition.
Authors: Cheung Kwai Ming J. , Reynisson Johannes , McDonald Edward
Published: January 2011

The cycloaddition of terminal alkynes with ester (II) affords the 3‐substituted regioisomers as main or exclusive products.
ChemInform Abstract: Fluorescent Sensors Based on 2‐Substituted Imidazolidines.
Authors: Tolpygin I. E. , Shepelenko E. N. , Revinskii Yu. V. , Tsukanov A. V. , Dubonosov A. D. , Bren V. A. , Minkin V. I.
Published: January 2011

Compounds (III a) and (III b) exhibit selective sensor properties for Hg2+ and Cu2+ ions.
ChemInform Abstract: Diastereoselective Silver‐Catalyzed 1,3‐Dipolar Cycloaddition of Azomethine Ylides with Fluorinated Imine.
Authors: Xie Haibo , Zhu Jiangtao , Chen Zixian , Li Shan , Wu Yongming
Published: January 2011

The procedure allows a new and diastereoselective access to highly substituted imidazolidines.
ChemInform Abstract: A Mild High‐Yielding Synthesis of Oxazole‐4‐carboxylate Derivatives.
Authors: Ferreira Paula M. T. , Castanheira Elisabete M. S. , Monteiro Luis S. , Pereira Goreti , Vilaca Helena
Published: January 2011

On treatment with DBU, esters of N‐acyl‐β‐halodehydraminobutyric acids produce the title compounds in good to excellent yields.
ChemInform Abstract: A General and Convenient Palladium‐Catalyzed Carbonylative Sonogashira Coupling of Aryl Bromides.
Authors: Wu Xiao‐Feng , Neumann Helfried , Beller Matthias
Published: January 2011

A variety of aromatic bromides and aromatic terminal alkynes are reacted to afford the products with good yields.
ChemInform Abstract: A Versatile Iron‐Catalyzed Protocol for the One‐Pot Synthesis of Isoxazoles or Isoxazolines from the Same Propargylic Alcohols.
Authors: Debleds Olivier , Gayon Eric , Ostaszuk Emilie , Vrancken Emmanuel , Campagne Jean‐Marc
Published: January 2011

Simple tuning of the cyclization conditions allows for the practical one‐pot preparation of the bisubstituted isoxazoles (II), (IV) and N‐phenylsulfonyl‐2,3‐dihydroisozazoles (VI), (VII).
ChemInform Abstract: Molecular Iodine in [bmim][BF4]: A Highly Efficient Green Catalytic System for One‐Pot Synthesis of 1,3‐Oxathiolan‐5‐one.
Authors: Dewan Manika , Kumar Ajeet , Saxena Amit , De Arnab , Mozumdar Subho
Published: January 2011

Compared to conventional solvents, [bmim]BF4 significantly accelerates the reaction of acid (I) with aromatic aldehydes.
ChemInform Abstract: Decarboxylative Cross‐Coupling of Azoyl Carboxylic Acids with Aryl Halides.
Authors: Zhang Fengzhi , Greaney Michael F.
Published: January 2011

A short synthesis of the alkaloid pimprinine (XIX) is also described.
ChemInform Abstract: Enantioselective Synthesis of the Novel Chiral Sulfoxide Derivative as a Glycogen Synthase Kinase 3β Inhibitor.
Authors: Saitoh Morihisa , Kunitomo Jun , Kimura Eiji , Yamano Toru , Itoh Fumio , Kori Masakuni
Published: January 2011

A gram scale access to the novel GSK‐3β inhibitor (II) is presented using Kagan′s enantioselective oxidation procedure.
ChemInform Abstract: N‐Heterocyclic Carbene‐Catalyzed Reaction of Alkynyl Aldehydes with 1,3‐Keto Esters or 1,3‐Diketones.
Authors: Zhu Zhi‐Qiang , Xiao Ji‐Chang
Published: January 2011

The optimized method can be performed atom‐economically under mild conditions to afford highly functionalized 3,4‐dihydropyranones.
ChemInform Abstract: Palladium‐Catalyzed Tandem Heck‐Lactonization from o‐Iodophenols and Enoates: Synthesis of Coumarins and the Study of the Mechanism by Electrospray Ionization Mass Spectrometry.
Authors: Fernandes Talita de A. , Vaz Boniek Gontijo , Eberlin Marcos N. , da Silva Alcides J. M. , Costa Paulo R. R.
Published: January 2011

It is found that the title reaction is sensitive to steric hindrance around the enone double bond and proceeds via formation of cationic palladium intermediates.
ChemInform Abstract: Fluorous Diastereomeric Mixture Synthesis (FDMS) of Hydantoin‐Fused Hexahydrochromeno[4,3‐b]pyrroles.
Authors: Lu Yimin , Geib Steven J. , Damodaran Krishnan , Sui Bin , Zhang Zijuan , Curran Dennis P. , Zhang Wei
Published: January 2011

Eight possible diastereomers of hydantoin‐fused hexahydrochromenopyrrole (VI) are synthesized by FDMS.
ChemInform Abstract: A New Commercially Viable Synthetic Route for Donepezil Hydrochloride: anti‐Alzheimer′s Drug.
Authors: Dubey Shailendra Kumar , Kharbanda Manita , Dubey Sushil Kumar , Mathela Chandra Shekhar
Published: January 2011

A new and economical approach to the anti‐Alzheimer′s drug donepezil (VI) is described.
ChemInform Abstract: Domino Imino‐Aldol—Aza‐Michael Reaction: One‐Pot Diastereo‐ and Enantioselective Synthesis of Piperidines.
Authors: Ghorai Manas K. , Halder Sandipan , Das Raj Kumar
Published: January 2011

The title reaction allows simple, general, and highly stereoselective access to highly functionalized target compounds.
ChemInform Abstract: Stereoselective Synthesis of 2,4,5‐Trisubstituted Piperidines via Radical Cyclization.
Authors: Ragoussi Maria‐Eleni , Walker Stephen M. , Piccanello Andrea , Kariuki Benson M. , Horton Peter N. , Spencer Neil , Snaith John S.
Published: January 2011

In the case of the silyl‐substituted educts (IX) and (XII), tandem 6‐exo‐trig and 5‐endo‐trig cyclizations are observed yielding the fused piperidines (XI).
ChemInform Abstract: Site‐Selective Cross‐Coupling of Dichlorinated Benzo‐Fused Nitrogen‐Heterocycles with Grignard Reagents.
Authors: Konishi Hideyuki , Itoh Tatsuya , Manabe Kei
Published: January 2011

The site‐selective cross‐coupling of dichlorinated benzo‐fused N‐heterocycles (I) having two chloro groups on the benzene ring is reported.
ChemInform Abstract: Rh‐Catalyzed Oxidative Coupling Between Primary and Secondary Benzamides and Alkynes: Synthesis of Polycyclic Amides.
Authors: Song Guoyong , Chen Dan , Pan Cheng‐Ling , Crabtree Robert H. , Li Xingwei
Published: January 2011

The reaction of secondary benzamides with alkynes allows a facile access to isoquinolones.
ChemInform Abstract: Perhydrofuro[3,2‐c]‐, Perhydropyrano[3,2‐c]‐ and 4‐Ethoxy‐2‐(5‐R‐furan‐2‐yl)tetrahydroquinolines. Synthesis and Transformations.
Authors: Zubkov F. I. , Zaitsev V. P. , Piskareva A. M. , Eliseeva M. N. , Nikitina E. V. , Mikhailova N. M. , Varlamov A. V.
Published: January 2011

Title furanyltetrahydroquinolines, e.g. (III) and (XII), are prepared by stereoselective cycloaddition of phenylimine (I) with either dihydrofuran, dihydropyran or vinyl ethyl ether (as previously described).
ChemInform Abstract: One‐Step Transformation of Tetracyanocyclopropyl Ketones into Pyrrolo[3,4‐c]pyridine Derivatives.
Authors: Kayukov Ya. S. , Bardasov I. N. , Kayukova O. V. , Ershov O. V. , Nasakin O. E.
Published: January 2011

The title reaction proceeds via recyclization of a furan‐ring intermediate into pyrrole and subsequent anellation of a pyridine ring.
ChemInform Abstract: Application of Cyclic 1,3‐Diketones in Domino and Multicomponent Reactions: Facile Route to Highly Functionalized Chromeno[2,3‐d]pyrimidinones and Diazabenzo[b]fluorenones under Solvent‐Free Conditions.
Authors: Kumar Ram , Raghuvanshi Keshav , Verma Rajiv K. , Singh Maya S.
Published: January 2011

Simple procedures using InCl3 [cf.
ChemInform Abstract: A General and Practical Access to Chiral Quinoxalinones with Low Copper‐Catalyst Loading.
Authors: Tanimori Shinji , Kashiwagi Hiroaki , Nishimura Takeshi , Kirihata Mitsunori
Published: January 2011

The quinoxalinones are synthesized with high optical purity by a domino‐type reaction from 2‐bromoanilines and α‐amino acids in the presence of a diamine as ligand.
ChemInform Abstract: Diastereoselective Reduction of Chiral N‐Tosyl‐2‐benzoyl‐1,3‐oxazine Derived from (1R)‐(+)‐Camphor.
Authors: Ko Kwang‐Young , Yun Hoseop
Published: January 2011

With DIBAL‐H in ether the (S)‐alcohol of (IV) is formed with 81% e.e.
ChemInform Abstract: Reaction of 1,3‐Dimethyl‐3a,9a‐diphenyl‐3,3a,9,9a‐tetrahydroimidazo [4,5‐e]‐1,3‐thiazolo[3,2‐b]‐1,2,4‐triazine‐2,7(1H,6H)‐dione with Isatins.
Authors: Vasilevskii Sergei V. , Nelyubina Yulia V. , Kolotyrkina Natal'ya G. , Belyakov Pavel A. , Kulikova Lyudmila B. , Kravchenko Angelina N.
Published: January 2011

Six compounds of type (III) are prepared by condensation reaction.
ChemInform Abstract: First Highly Enantioselective Synthesis of Benzodiazepinones by Catalytic Hydrogenation.
Authors: Rueping Magnus , Merino Estibaliz , Koenigs Rene M.
Published: January 2011

The microwave‐assisted method is based on the use of allyl Hantzsch ester AHE as hydride source and chiral N‐triflyl phosphoramide PHA as organocatalyst.
ChemInform Abstract: Regioselective Preparation of Functionalized exo‐Methylenecyclopentanes and exo‐Methylenepyrrolidines via Silaborative Carbocyclization of 1,6‐Enynes.
Authors: Gerdin Martin , Nadakudity Kumar , Worch Christin , Moberg Christina
Published: January 2011

The title reactions are performed with silylpinacolboranes (II) or (VII) by use of an catalytically active Pd(0) carbene species generated in situ by treatment of Pd(II) complex PIP with MeMgCl.
ChemInform Abstract: N‐Phosphorylated Imidazolium Salts as Precursors to 2‐ and 5‐Phosphorylated Imidazoles and New Imidazol‐2‐ylidenes Featuring the PNCN Unit.
Authors: Marchenko Anatolii P. , Koidan Heorgii N. , Huryeva Anastasiya N. , Zarudnitskii Evgeniy V. , Yurchenko Aleksandr A. , Kostyuk Aleksandr N.
Published: January 2011

The imidazolium salts are precursors of stable imidazol‐2‐ylidenes which upon heating undergo transformation into 2‐phosphorylated imidazoles.
ChemInform Abstract: CuS/Fe: A Novel and Highly Efficient Catalyst System for Coupling Reaction of Aryl Halides with Diaryl Diselenides.
Authors: Li Yaming , Wang Huifeng , Li Xiaoying , Chen Tao , Zhao Defeng
Published: January 2011

The coupling proceeds best with aryl iodides and is selective in the presence of other halides [cf.
ChemInform Abstract: Synthesis, Cytotoxicity and Antimalarial Activity of Ferrocenyl Amides of 4‐Aminoquinolines.
Authors: N'Da David D. , Breytenbach Jaco C. , Smith Peter J. , Lategan Carmen
Published: January 2011

A series of ferrocenyl derivatives of type (V) are evaluated for their antimalarial activities against both chloroquine‐sensitive and resistant strains of Plasmodium falciparum.
ChemInform Abstract: Four New Cembrane Diterpenes Isolated from an Okinawan Soft Coral Lobophytum crassum with Inhibitory Effects on Nitric Oxide Production.
Authors: Wanzola Mpanzu , Furuta Takaaki , Kohno Yasuhisa , Fukumitsu Shunichi , Yasukochi Shuhei , Watari Kosuke , Tanaka Chiaki , Higuchi Ryuichi , Miyamoto Tomofumi
Published: January 2011

Isolation and structure elucidation of title compounds (I)—(IV) are described.
ChemInform Abstract: Rhodamine—Sugar Based Turn‐On Fluorescent Probe for the Detection of Cysteine and Homocysteine in Water.
Authors: Yang Young‐Keun , Shim Soyoung , Tae Jinsung
Published: January 2011

A complex of Au+ and rhodamine hydroxylamine (I) can selectively detect cysteine and homocysteine in aqueous solution in concentrations down to 100nM.
ChemInform Abstract: Synthesis and Hydrolysis of Bicyclic 2‐Imino‐2,5‐dihydrofurans Fused to a Pyridine Ring.
Authors: Avetisyan A. A. , Karapetyan L. V. , Tadevosyan M. D.
Published: January 2011

The diones (IV) may be regarded as analogues of the natural alkaloid cerpegin.
ChemInform Abstract: Synthesis and Antiviral Evaluation of 1′‐Branched‐5′‐norcarbocyclic Adenosine Phosphonic Acid Analogues.
Authors: Oh Chang Hyun , Yoo Kyung Ho , Hong Joon Hee
Published: January 2011

Nucleoside phosphonate (VII) and its derived phosphonic acid are subjected to antiviral screening against HSV, coxsakie B virus, poliovirus, and HIV.
ChemInform Abstract: Synthesis of SATE Prodrug of 6′‐Fluoro‐6′‐methyl‐5′‐noradenosine Nucleoside Phosphonic Acid as a New Class of anti‐HIV Agent.
Authors: Li Hua , Yoo Jin Cheol , Baik Young Chan , Lee Wonjae , Hong Joon Hee
Published: January 2011

Applying the bis(SATE) approach leads to a novel SATE prodrug type (XI).
ChemInform Abstract: Concise Synthesis of (.+‐.)‐Perrottetinene with Bibenzyl Cannabinoid.
Authors: Park Byung Ho , Lee Yong Rok
Published: January 2011

The title compound (.+‐.)‐(VI) is structurally related to cannabinoids and is synthesized via hetero Diels—Alder reaction of a quinine methide intermediate, derived from citral addition product (III).
ChemInform Abstract: An Enantio‐ and Diastereocontrolled Synthesis of (‐)‐Salinosporamide A (X).
Authors: Sato Yosuke , Fukuda Hayato , Tomizawa Masaki , Masaki Tomohito , Shibuya Masatoshi , Kanoh Naoki , Iwabuchi Yoshiharu
Published: January 2011

involving an organocatalytic aldolization, a Rh‐catalyzed Reformatsky reaction and an AZADO‐catalyzed oxidative β‐lactonization as key steps
ChemInform Abstract: Structural Modification of a Specific Antimicrobial Lead Against Helicobacter pylori Discovered from Traditional Chinese Medicine and a Structure—Activity Relationship Study.
Authors: Zhang Bang‐Le , Fan Cheng‐Qi , Dong Lei , Wang Fang‐Dao , Yue Jian‐Min
Published: January 2011

A series of analogues of psoralen (Ia) is synthesized to improve the antimicrobial potency.
ChemInform Abstract: Synthesis of Magic‐Sized CdSe and CdTe Nanocrystals with Diisooctylphosphinic Acid.
Authors: Dukes Albert D. III , McBride James R. , Rosenthal Sandra J.
Published: January 2011

Magic‐sized CdSe nanocrystals with band edge absorption peaks at 414, 446, and 490 nm, and magic‐sized CdTe nanocrystals with band edge absorption peaks at 445 and 483 nm are synthesized from CdO in hexadecylamine and Se or Te in PBu3 using diisooctylphosphonic acid as the capping ligand.
ChemInform Abstract: Design, Synthesis and Biological Evaluation of 3‐(4‐Halophenyl)‐3‐oxopropanal and Their Derivatives as Novel Antibacterial Agents.
Authors: Liu Jinbing , Yi Wei , Hu Jianming , Wu Fengyan , Zhao Liangzhong , Song Huacan , Wang Zhihou
Published: January 2011

Title compounds (I) and their precursors are tested for antimicrobial activity against both Gram‐positive and Gram‐negative bacteria.
ChemInform Abstract: Synthesis and Anticonvulsant Activity of Certain Substituted Furochromone, Benzofuran and Flavone Derivatives.
Authors: Ragab Fatma Abdel‐Fattah , El‐Sayed Nehad Aboul Magd , Eissa Amal Abdel Haleem Mohamed , El Kerdawy Ahmed Mahmoud
Published: January 2011

All newly synthesized benzofurans (I), furochromones (II), and flavones (III) as well as selected intermediates are evaluated for their anticonvulsant activity using both scPTZ and MES tests.
ChemInform Abstract: Design, Synthesis and Evaluation of Difunctionalized 4‐Hydroxybenzaldehyde Derivatives as Novel Cholinesterase Inhibitors.
Authors: Yu Liang , Cao Rihui , Yi Wei , Yan Qin , Chen Zhiyong , Ma Lin , Song Huacan
Published: January 2011

A series of difunctionalized 4‐hydroxybenzaldehyde derivatives (I) is designed, synthesized, and evaluated as cholinesterase (AChE, BChE) inhibitors.
ChemInform Abstract: Synthesis and Functionalization of Chalcogenide Nanotubes
Authors: Tahir Muhammad Nawaz , Yella Aswani , Sahoo Jugal Kishore , Annal‐Therese Helen , Zink Nicole , Tremel Wolfgang
Published: January 2011

Review: 184 refs.
ChemInform Abstract: EPR Identification of Intrinsic Defects in SiC
Authors: Isoya J. , Umeda T. , Mizuochi N. , Son N. T. , Janzen E. , Ohshima T.
Published: January 2011

Review: 65 refs.
ChemInform Abstract: Coordination and Organometallic Nanomaterials
Authors: Kharisov Boris I. , Kharissova Oxana V. , Valdes Juan Jacobo Ruiz , Perez Victor M. Jimenez
Published: January 2011

Review: 94 refs.
ChemInform Abstract: Preparation, Structure and Properties of Linked Transition‐Metal Multinuclear Carbonyl Clusters
Authors: Zhu Bao‐Hua
Published: January 2011

Review: 64 refs.
ChemInform Abstract: Synthesis and Properties of Chiral Ferrocenylalcohols and Diols
Authors: Patti Angela , Pedotti Sonia
Published: January 2011

Review: 186 refs.
ChemInform Abstract: One‐Electron Oxidation of DNA: Reaction at Thymine
Authors: Joseph Joshy , Schuster Gary B.
Published: January 2011

Review: 49 refs.
ChemInform Abstract: Designing Late‐Transition Metal Catalysts for Olefin Insertion Polymerization and Copolymerization
Authors: Camacho Drexel H. , Guan Zhibin
Published: January 2011

Review: 172 refs.
ChemInform Abstract: Prins‐Type Macrocyclizations as an Efficient Ring‐Closing Strategy in Natural Product Synthesis
Authors: Crane Erika A. , Scheidt Karl A.
Published: January 2011

Review: 60 refs.
ChemInform Abstract: Functional Cyclophanes: Promising Hosts for Optical Biomolecular Recognition
Authors: Ramaiah Danaboyina , Neelakandan Prakash P. , Nair Akhil. K. , Avirah Rekha R.
Published: January 2011

Review: 60 refs.
ChemInform Abstract: Inherently Chiral Concave Molecules — From Synthesis to Applications
Authors: Szumna Agnieszka
Published: January 2011

Review: 76 refs.
ChemInform Abstract: Multicomponent Reactions for the Synthesis of Pyrroles
Authors: Estevez Veronica , Villacampa Mercedes , Menendez J. Carlos
Published: January 2011

Review: 97 refs.
ChemInform Abstract: Organocatalytic Strategies for the Asymmetric Functionalization of Indoles
Authors: Bartoli Giuseppe , Bencicenni Giorgio , Dalpozzo Renato
Published: January 2011

Review: 127 refs.
ChemInform Abstract: Pharmacologically Active Compounds in the Environment and Their Chirality
Authors: Kasprzyk‐Hordern Barbara
Published: January 2011

Review: 212 refs.
ChemInform Abstract: Hydrolases: Catalytically Promiscuous Enzymes for Non‐Conventional Reactions in Organic Synthesis
Authors: Busto Eduardo , Gotor‐Fernandez Vicente , Gotor Vicente
Published: January 2011

Review: 111 refs.
ChemInform Abstract: Nucleic Acid/Organic Polymer Hybrid Materials: Synthesis, Superstructures, and Applications
Authors: Kwak Minseok , Herrmann Andreas
Published: January 2011

Review: 144 refs.
ChemInform Abstract: Vegetable Oil‐Based Polymeric Matrials: Synthesis, Properties, and Applications.
Authors: Xia Ying , Larock Richard C.
Published: January 2011

Review: 147 refs.
ChemInform Abstract: Ligand Development in the Ni‐Catalyzed Hydrocyanation of Alkenes
Authors: Bini Laura , Mueller Christian , Vogt Dieter
Published: January 2011

Review: 47 refs.
ChemInform Abstract: Indium‐Catalyzed Conia‐Ene Reaction and Total Syntheses of Biologically Active Alkaloids
Authors: Takahashi Keisuke , Hatakeyama Susumi
Published: January 2011

Review: about 50 refs.
ChemInform Abstract: Origin of the Dimeric Aplysinopsin Alkaloids
Authors: Boyd Emily M. , Sperry Jonathan
Published: January 2011

Review: 20 refs.
ChemInform Abstract: π‐Conjugated Disilenes Stabilized by Fused‐Ring Bulky “Rind” Groups
Authors: Matsuo Tsukasa , Kobayashi Megumi , Tamao Kohei
Published: January 2011

Review: 58 refs.
ChemInform Abstract: Chiral Diphosphines and Diphosphinites Derived from 2,2′‐Biphosphole: Stereodynamic Ligands for Asymmetric Catalysis
Authors: Gouygou Maryse , Daran Jean‐Claude , Robe Emmanuel , Ortega Carmen
Published: January 2011

Review: 27 refs.
ChemInform Abstract: Activation Energy of Tribochemical and Heterogeneous Catalytic Reactions
Authors: Kajdas C. K. , Kulczycki A. , Kurzydlowski K. J. , Molina G. J.
Published: January 2011

Review: 38 refs.
ChemInform Abstract: Fundamentals of Immobilization of Organometallic Complexes on Aluminosilicate Materials
Authors: Cerveny Libor , Leitmannova Eliska , Kacer Petr
Published: January 2011

Review: 103 refs.
ChemInform Abstract: Designable Biointerfaces Using Vapor‐Based Reactive Polymers
Authors: Chen Hsien‐Yeh , Lahann Joerg
Published: January 2011

Review: 69 refs.
ChemInform Abstract: Solid State NMR Spectroscopy
Authors: Aliev A. E. , Law R. V.
Published: January 2011

Review: 213 refs.
Crystal structure and phase transition of single crystalline CsNH2SO3
Authors: Fukami T. , Kyan T. , Nakano K. , Chen R. H.
Published: January 2011

Differential scanning calorimetry (DSC) and X‐ray diffraction measurements have been performed on cesium sulfamate CsNH2SO3 single crystal. Two distinct endothermic peaks in the DSC curves are observed at 330 and 436 K. It is pointed out that the peak at 330 K is attributed to the structural phase transition, and the other peak at 436 K is associated with the thermal decomposition of the crystal. The structures in room‐ and high‐temperasture phases are determined, and the space group of the sample crystal is found to change from monoclinic P 21/c to orthorhombic Pnma. The structure of the room‐temperature phase consists of two different types of N‐H···O hydrogen bond, but in the high‐temperature phase there is no specific hydrogen bond between the NSO3 pseudo‐tetrahera. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Hydrogen release in annealed hydrogenated a‐Si/a‐Ge multilayers
Authors: Frigeri C. , Serényi M. , Khánh N. Q. , Csik A. , Erdélyi Z. , Nasi L. , Beke D. L. , Boyen H.‐G.
Published: January 2011

A combined study of hydrogenated sputtered single a‐Si and a‐Ge layers and a‐Si/a‐Ge multilayers (MLs) has been carried out in order to establish the reasons of H release and associated structural degradation of the MLs when they are submitted to annealing. ERDA analysis of the single layers of a‐Si and a‐Ge shows that H escapes from the layer much more efficiently in a‐Ge than in a‐Si. This agrees with IR absorbance measurements on the MLs showing that the Ge‐H signal disappears at a lower annealing time (for a given annealing temperature) than Si‐H and Si‐H2 do. The conclusion is drawn that the structural degradation of a‐Si/a‐Ge MLs primary starts with release of H in the Ge layers most probably because of the smaller binding energy of the H‐Ge bond and the greater weakness of the Ge lattice. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Efficient Acid–Base Bifunctional Catalysts for the Fixation of CO2 with Epoxides under Metal‐ and Solvent‐Free Conditions
Authors: Sun Jian , Han Lijun , Cheng Weiguo , Wang Jinquan , Zhang Xiangping , Zhang Suojiang
Published: January 2011

A series of acid–base bifunctional catalysts (ABBCs) that contain one or two Brønsted acidic sites in the cationic part and a Lewis‐basic site in the anionic part are used as efficient catalysts for the synthesis of cyclic carbonates by cycloaddition of CO2 to epoxides, without the use of additional co‐catalyst or co‐solvent. The effects of the catalyst structures and various reaction parameters on the catalytic performance are investigated in detail. Almost complete conversion can be achieved in 1 h for propylene oxide using [{(CH2)3COOH}2im]Br under mild reaction conditions (398 K and 2 MPa). Furthermore, the catalyst can be recycled over five times without substantial loss of catalytic activity. This protocol is found to be applicable to a variety of terminal epoxides, producing the corresponding cyclic carbonates in good yields and high selectivities. A synergistic effect of the acidic and the basic sites as well as suitable hydrogen‐bonding strength of ABBCs are considered crucial for the reaction to proceed smoothly. The activities of the ABBCs increase remarkably with increasing carboxylic‐acid chain length of the cation. This metal‐ and solvent‐free process thus represents an environmentally friendly process for BTC‐catalyzed conversion of CO2 into value‐added chemicals.