bluuebunny/crossref_metadata_2025_split huggingface dataset:
Preparation of Polyfunctional Arylmagnesium, Arylzinc, and Benzylic Zinc Reagents by Using Magnesium in the Presence of LiCl
Authors: Piller Fabian M. , Metzger Albrecht , Schade Matthias A. , Haag Benjamin A. , Gavryushin Andrei , Knochel Paul 
Published: June 2009

AbstractThe presence of LiCl considerably facilitates the insertion of magnesium into various aromatic and heterocyclic bromides. Several functional groups, such as ‐OBoc, ‐OTs, ‐Cl, ‐F, ‐CF3, ‐OMe, ‐NMe2, and ‐N2NR2, are well tolerated. The presence of a cyano group leads in some cases to competitive reduction of the organic halide to the corresponding ArH compound. The presence of sensitive groups such as methyl or ethyl ester is tolerated upon in situ trapping of the intermediate magnesium reagent with ZnCl2. This method can also be applied to the preparation of functionalized benzylic zinc reagents from benzylic chlorides. In the case of di‐ or tribromoaryl derivatives, directing groups such as ‐OPiv, ‐OTs, ‐N2NR2, or ‐OAc orient the zinc insertion (Zn/LiCl) to the ortho‐position, while the reaction with Mg/LiCl or Mg/LiCl/ZnCl2 leads to regioselective insertion into the para‐carbon–bromine bond. Large‐scale experiments (20–100 mmol) for all of the metalation procedures are described.
Preparation of 2‐Quinolones by Sequential Heck Reduction–Cyclization (HRC) Reactions by Using a Multitask Palladium Catalyst
Authors: Felpin François‐Xavier , Coste Jérôme , Zakri Cécile , Fouquet Eric 
Published: June 2009

AbstractOne‐pot sequential Heck reduction–cyclization (HRC) reactions leading to the synthesis of substituted 2‐quinolones have been developed by using a heterogeneous or mixed homogeneous/heterogeneous multitask palladium catalyst with charcoal as a support. The whole sequence occurs under very mild conditions without the need for additives (ligand or base) by taking advantage of the high reactivity of aryldiazonium salts as “super electrophiles”. Recycling experiments showed that the reused heterogeneous Pd0/C catalyst was not able to promote another HRC sequence but was, however, still highly active for hydrogenation, hydrodehalogenation, as well as hydrogenolysis reactions.
Molecular Nitrides with Titanium and Group 13–15 Elements
Authors: García‐Castro María , Martín Avelino , Mena Miguel , Yélamos Carlos 
Published: June 2009

AbstractSeveral heterometallic nitrido complexes were prepared by reaction of the imido–nitrido titanium complex [{Ti(η5‐C5Me5)(μ‐NH)}3(μ3‐N)] (1) with amido derivatives of Group 13–15 elements. Treatment of 1 with bis(trimethylsilyl)amido [M{N(SiMe3)2}3] derivatives of aluminum, gallium, or indium in toluene at 150–190 °C affords the single‐cube amidoaluminum complex [{(Me3Si)2N}Al{(μ3‐N)2(μ3‐NH)Ti3(η5‐C5Me5)3(μ3‐N)}] (2) or the corner‐shared double‐cube compounds [M(μ3‐N)3(μ3‐NH)3{Ti3(η5‐C5Me5)3(μ3‐N)}2] [M=Ga (3), In (4)]. Complexes 3 and 4 were also obtained by treatment of 1 with the trialkyl derivatives [M(CH2SiMe3)3] (M=Ga, In) at high temperatures. The analogous reaction of 1 with [{Ga(NMe2)3}2] at 110 °C leads to [{Ga(μ3‐N)2(μ3‐NH)Ti3(η5‐C5Me5)3(μ3‐N)}2] (5), in which two [GaTi3N4] cube‐type moieties are linked through a gallium–gallium bond. Complex 1 reacts with one equivalent of germanium, tin, or lead bis(trimethylsilyl)amido derivatives [M{N(SiMe3)2}2] in toluene at room temperature to give cube‐type complexes [M{(μ3‐N)2(μ3‐NH)Ti3(η5‐C5Me5)3(μ3‐N)}] [M=Ge (6), Sn (7), Pb (8)]. Monitoring the reaction of 1 with [Sn{N(SiMe3)2}2] and [Sn(C5H5)2] by NMR spectroscopy allows the identification of intermediates [RSn{(μ3‐N)(μ3‐NH)2Ti3(η5‐C5Me5)3(μ3‐N)}] [R=N(SiMe3)2 (9), C5H5 (10)] in the formation of 7. Addition of one equivalent of the metalloligand 1 to a solution of lead derivative 8 or the treatment of 1 with a half equivalent of [Pb{N(SiMe3)2}2] afford the corner‐shared double‐cube compound [Pb(μ3‐N)2(μ3‐NH)4{Ti3(η5‐C5Me5)3(μ3‐N)}2] (11). Analogous antimony and bismuth derivatives [M(μ3‐N)3(μ3‐NH)3{Ti3(η5‐C5Me5)3(μ3‐N)}2] [M=Sb (12), Bi (13)] were obtained through the reaction of 1 with the tris(dimethylamido) reagents [M(NMe2)3]. Treatment of 1 with [AlCl2{N(SiMe3)2}(OEt2)] affords the precipitation of the singular aluminum–titanium square‐pyramidal aggregate [{{(Me3Si)2N}Cl3Al2}(μ3‐N)(μ3‐NH)2{Ti3(η5‐C5Me5)3(μ‐Cl)(μ3‐N)}] (14). The X‐ray crystal structures of 5, 11, 13, 14, and [AlCl{N(SiMe3)2}2] were determined.
Chemoselective Aromatic Azido Reduction with Concomitant Aliphatic Azide Employing Al/Gd Triflates/NaI and ESI‐MS Mechanistic Studies
Authors: Kamal Ahmed , Markandeya Nagula , Shankaraiah Nagula , Reddy C. Ratna , Prabhakar S. , Reddy C. Sanjeeva , Eberlin Marcos N. , Silva Santos Leonardo 
Published: June 2009

AbstractAluminium and gadolinium triflates catalyze the chemoselective reduction of aromatic azides to the corresponding amines in combination with sodium iodide. This mild chemoselective method has been applied to the synthesis of various aryl amines, C2‐azido‐substituted pyrrolo[2,1‐c][1,4]benzodiazepines, and fused[2,1‐b]quinazolinones by an intramolecular azido reduction tandem cyclization reaction. Interestingly, this methodology selectively reduces aryl azides with enhanced yields and proceeds in shorter reaction times than previous strategies. The mechanistic aspects have been investigated and the intermediates associated with this selective transformation have been intercepted and characterized by online monitoring of the reaction by ESI‐MS.
Role of the Support in Catalysis: Activation of a Mononuclear Ruthenium Complex for Ethene Dimerization by Chemisorption on Dealuminated Zeolite Y
Authors: Ogino Isao , Gates Bruce C. 
Published: June 2009

AbstractA set of supported ruthenium complexes with systematically varied ratios of chemisorbed to physisorbed species was formed by contacting cis‐[Ru(acac)2(C2H4)2] (I; acac=C5H7O2−) with dealuminated zeolite Y. Extended X‐ray absorption fine structure (EXAFS) spectra used to characterize the samples confirmed the systematic variation in the loadings of the two supported species and demonstrated that removal of bidentate acac ligands from I accompanied chemisorption to form [Ru(acac)(C2H4)2]+ attached through two RuO bonds to the Al sites of the zeolite. A high degree of uniformity in the chemisorbed species was demonstrated by sharp bands in the infrared (IR) spectrum characteristic of ruthenium dicarbonyls that formed when CO reacted with the anchored complex. When the ruthenium loading exceeded 1.0 wt % (Ru/Al≈1:6), the additional adsorbed species were simply physisorbed. Ethene ligands on the chemisorbed species reacted to form butenes when the temperature was raised to approximately 393 K; acac ligands remained bonded to Ru. In contrast, ethene ligands on the physisorbed complex simply desorbed under the same conditions. The chemisorption activated the ruthenium complex and facilitated dimerization of the ethene, which occurred catalytically. IR and EXAFS spectra of the supported samples indicate that 1) Ru centers in the chemisorbed species are more electron deficient than those in the physisorbed species and 2) Ru–ethene bonds in the chemisorbed species are less symmetric than those in the physisorbed species, which implies the presence of a preferred configuration for the catalytic dimerization.
Cationic Heterocycles as Ligands: Synthesis and Reactivity with Anionic Nucleophiles of Cationic Triruthenium Clusters Containing C‐Metalated N‐Methylquinoxalinium or N‐Methylpyrazinium Ligands
Authors: Cabeza Javier A. , del Río Ignacio , Goite María C. , Pérez‐Carreño Enrique , Pruneda Vanessa 
Published: June 2009

AbstractThe cationic cluster complexes [Ru3(CO)10(μ‐H)(μ‐κ2N,C‐L1Me)]+ (3+; HL1=quinoxaline) and [Ru3(CO)10(μ‐H)(μ‐κ2N,C‐L2Me)]+ (5+; HL2=pyrazine) have been prepared as triflate salts by treatment of their neutral precursors [Ru3(CO)10(μ‐H)(μ‐κ2N,C‐Ln)] with methyl triflate. The cationic character of their heterocyclic ligands is responsible for their enhanced tendency to react with anionic nucleophiles relative to that of hydrido triruthenium carbonyl clusters that have neutral N‐heterocyclic ligands. These clusters react instantaneously with methyl lithium and potassium tris‐sec‐butylborohydride (K‐selectride) to give neutral products that contain novel nonaromatic N‐heterocyclic ligands. The following are the products that have been isolated: [Ru3(CO)9(μ‐H)(μ3‐κ2N,C‐L1Me2)] (6; from 3+ and methyl lithium), [Ru3(CO)9(μ‐H)(μ3‐κ2N,C‐L1HMe)] (7; from 3+ and K‐selectride), [Ru3(CO)9(μ‐H)(μ3‐κ2N,C‐L2Me2)] (8; from 5+ and methyl lithium), and [Ru3(CO)9(μ‐H)(μ3‐κ2N,C‐L2HMe)] (11; from 5+ and K‐selectride). Whereas the reactions of 3+ lead to products that arise from the attack of the corresponding nucleophile at the C atom of the only CH group adjacent to the N‐methyl group, the reactions of 5+ give mixtures of two products that arise from the attack of the nucleophile at one of the C atoms located on either side of the N‐methyl group. The LUMOs and the atomic charges of 3+ and 5+ confirm that the reactions of these clusters with anionic nucleophiles are orbital‐controlled rather than charge‐controlled processes. The N‐heterocyclic ligands of all of these neutral products are attached to the metal atoms in nonconventional face‐capping modes. Those of compounds 6–8 have the atoms of a ligand CN fragment σ‐bonded to two Ru atoms and π‐bonded to the other Ru atom, whereas the ligand of compound 11 has a CN fragment attached to a Ru atom through the N atom and to the remaining two Ru atoms through the C atom. A variable‐temperature 1H NMR spectroscopic study showed that the ligand of compound 7 is involved in a fluxional process at temperatures above −93 °C, the mechanism of which has been satisfactorily modeled with the help of DFT calculations and involves the interconversion of the two enantiomers of this cluster through a conformational change of the ligand CH2 group, which moves from one side of the plane of the heterocyclic ligand to the other, and a 180° rotation of the entire organic ligand over a face of the metal triangle.
ChemInform Abstract: The Smallest “Aurophilic Species”.
Authors: Berger Raphael J. F. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Growth Mechanism and Chemical Bonding in Scandium‐Doped Copper Clusters: Experimental and Theoretical Study in Concert.
Authors: Hoeltzl Tibor , Veldeman Nele , De Haeck Jorg , Veszpremi Tamas , Lievens Peter , Nguyen Minh Tho 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Controllable Red, Green, Blue (RGB) and Bright White Upconversion Luminescence of Lu2O3:Yb3+/Er3+/Tm3+ Nanocrystals Through Single Laser Excitation at 980 nm.
Authors: Yang Jun , Zhang Cuimiao , Peng Chong , Li Chunxia , Wang Lili , Chai Ruitao , Lin Jun 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Comparative XANES Study on the Two Electron‐Doped High‐Tc Superconductor Systems, (Sr,La)CuO2 and (Nd,Ce)2CuO4.
Authors: Tanaka Y. , Karppinen M. , Chen J. M. , Liu R. S. , Yamauchi H. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Metamagnetic Transition in the 75 K Antiferromagnet Gd4Co2Mg3.
Authors: Gorsse S. , Chevalier B. , Tuncel S. , Poettgen R. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Orbital Hybridization and Magnetic Coupling of the A‐Site Cu Spins in CaCu3B4O12 (B: Ti, Ge, and Sn) Perovskites.
Authors: Mizumaki M. , Saito T. , Shiraki H. , Shimakawa Y. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Cationic Clathrate I Si46‐xPxTey (6.6(1) ≤ y ≤ 7.5(1), x ≤ 2y): Crystal Structure, Homogeneity Range, and Physical Properties.
Authors: Zaikina J. V. , Kovnir K. A. , Burkhardt U. , Schnelle W. , Haarmann F. , Schwarz U. , Grin Yu. , Shevelkov A. V. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Single‐Crystal Structure Determination and Solid‐State NMR Investigations of Lithium Nitridosilicate Li2SiN2 Synthesized by a Precursor Approach Employing Amorphous “Si(CN2)2”.
Authors: Pagano Sandro , Zeuner Martin , Hug Stephan , Schnick Wolfgang 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: How Much Water Does Calcined Gypsum Contain?
Authors: Weiss Horst , Braeu Michael F. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Eu Activated ZnMgAl10O17 Nanophosphor.
Authors: Deshmukh Abhay D. , Dhoble S. J. , Kumar Animesh , Godbole S. V. , Bhide M. K. , Peshwe D. R. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Rare‐Earth Metal(III) Fluoride Oxoselenates(IV) MF[SeO3] (M: Y, Ho—Lu) with YF[SeO3]‐Type Structure.
Authors: Lipp Christian , Schleid Thomas 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Pr2CBr: A Ferromagnet with Pr2C Layers.
Authors: Mattausch Hansjuergen , Kremer Reinhard K. , Simon Arndt 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: EuKNaTaO5: Crystal Growth, Structure and Photoluminescence Property.
Authors: Roof Irina P. , Smith Mark D. , Park Sangmoon , zur Loye Hans‐Conrad 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Plasmonic Cu2‐xS Nanocrystals: Optical and Structural Properties of Copper‐Deficient Copper(I) Sulfides.
Authors: Zhao Yixin , Pan Hongcheng , Lou Yongbing , Qiu Xiaofeng , Zhu JunJie , Burda Clemens 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electro Organic Synthesis Utilizing Mg Electrodes(III) — E.O.S. Hydrogenation of Stilbene Equivalent to Catalytic Hydrogenation.
Authors: Jang Younsun , Lee Taesung , Kim Hongbum 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Continuous‐Flow Microreactor Chemistry under High‐Temperature/Pressure Conditions.
Authors: Razzaq Tahseen , Glasnov Toma N. , Kappe C. Oliver 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalytic Asymmetric Electrophilic α‐Amination of β‐Ketoesters in the Presence of Chiral Nickel Complexes.
Authors: Mang Joo Yang , Kwon Dae Gil , Kim Dae Young 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Rhodium‐Catalyzed Conjugate Addition of Sb‐Aryl‐1,5‐azastibocines to α,β‐Unsaturated Carbonyl Compounds.
Authors: Kakusawa Naoki , Yasuike Shuji , Kurita Jyoji 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: First Entry to [4 + 2] Cycloadditions Involving 5‐Amino‐2‐furanmethanols.
Authors: Medimagh Raouf , Marque Sylvain , Prim Damien , Chatti Saber 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Au(I)‐Catalyzed Cycloisomerizations Terminated by sp3 C—H Bond Insertion.
Authors: Horino Yoshikazu , Yamamoto Takuya , Ueda Kohki , Kuroda Shigeyasu , Toste F. Dean 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Unexpected Mode of Reactivity in Nitrosation of cis‐1,1‐Dichloro‐2,3‐diphenylcyclopropane with NOCl·2SO3.
Authors: Bondarenko Oksana B. , Gavrilova Anna Yu. , Polunina Veranika V. , Starikova Zoya A. , Zyk Nikolai V. , Zefirov Nikolai S. 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Baeyer—Villiger Oxidation of Ketones with Bis(trimethylsilyl) Peroxide in the Presence of Ionic Liquids as the Solvent and Catalyst.
Authors: Baj Stefan , Chrobok Anna , Slupska Roksana 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Simple and Efficient Methods for Selective Preparation of α‐Mono or α,α‐Dichloro Ketones and β‐Ketoesters by Using DCDMH.
Authors: Chen Zizhan , Zhou Bin , Cai Huihua , Zhu Wei , Zou Xinzhuo 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Micellar System Mediated Direct Fluorination of Ketones in Water.
Authors: Stavber Gaj , Zupan Marko , Stavber Stojan 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Decarboxylative Protonation of Allyl Ester Catalyzed by Pt and Ru.
Authors: Gowrisankar Saravanan , Kim Eun Sun , Kim Jae Nyoung 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalyst‐Free Water‐Mediated N‐Boc Deprotection.
Authors: Wang Gan , Li Chunjun , Li Jian , Jia Xueshun 
Published: June 2009

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.