bluuebunny/crossref_metadata_2025_split huggingface dataset:
Incidence and predictors of permanent pacemaker implantation following transcatheter aortic valve implantation: Analysis from the german transcatheter aortic valve interventions registry
Authors: Ledwoch Jakob , Franke Jennifer , Gerckens Ulrich , Kuck Karl‐Heinz , Linke Axel , Nickenig Georg , Krülls‐Münch Jürgen , Vöhringer Matthias , Hambrecht Rainer , Erbel Raimund , Richardt Gert , Horack Martin , Zahn Ralf , Senges Jochen , Sievert Horst ,   on behalf of the German Transcatheter Aortic Valve Interventions Registry Investigators
Published: March 2013

ObjectivesTo determine predictors of permanent pacemaker (PPM) implantation up to 30 days after transcatheter aortic valve implantation (TAVI) in a prospective multicenter registry.BackgroundConduction disorders requiring PPM implantation are one of the most common complications seen after TAVI. Knowledge about possible predictors may help to decrease the rate of PPM implantations.MethodsIn total, 1347 consecutive patients who underwent TAVI in 22 centers were prospectively enrolled in the German transcatheter aortic valve interventions registry. Both Medtronic CoreValve™ and Edwards Sapien™ valves were implanted. Patients with preprocedurally implanted PPM or implantable cardioverter defibrillator were excluded from the analysis (n = 199). Regression analysis of baseline and procedure characteristics of the remaining 1,147 patients was performed.ResultsProcedural success was achieved in 97.4% of the cases. The rate for PPM after TAVI was 33.7%. The absence of prior valve surgery, the use of Medtronic CoreValve™ prosthesis and the presence of a porcelain aorta were identified as independent predictors for PPM after TAVI. Mortality at 30 days did not differ between patients with or without PPM necessity (6.0% vs. 8.1%, respectively; HR 0.72; CI (0.45–1.16); P = 0.17).ConclusionsPPM is a common postprocedure requirement after TAVI. The absence of prior valve surgery, the implantation of Medtronic CoreValve™ prosthesis, and the presence of a porcelain aorta were independently associated with PPM after TAVI. © 2013 Wiley Periodicals, Inc.
ChemInform Abstract: Ca11E3C8 (E: Sn, Pb): New Complex Carbide Zintl Phases Grown from Ca/Li Flux.
Authors: Blankenship Trevor V. , Lita Adrian , Latturner Susan E. 
Published: March 2013

AbstractThe title phases are prepared from carbon and Sn or Pb in an equimolar Ca/Li reactive flux (sealed steel crucible in a sealed silica tube, 1050 °C, 4 h; controlled cooling).
ChemInform Abstract: Synthesis and Crystal Structure of Two New Quaternary Thallium(I) Copper(I) Lutetium(III) Selenides: TlCu3Lu2Se5 and Tl2Cu5Lu3Se8.
Authors: Babo Jean‐Marie , Schleid Thomas , Albrecht‐Schmitt Thomas E. 
Published: March 2013

AbstractThe reaction of Cu and Lu metal with Se in an equimolar mixture of TlSe/TlCl as reactive flux (evacuated silica tube, 850 °C, 10 d) yields orange TlCu3Lu2Se5 (I) as main product besides deep orange Tl2Cu5Lu3Se8 (II) crystals as minor product.
ChemInform Abstract: Access to a Wide Range of Sultams by Cyclodialkylation of α‐Substituted Methanesulfonanilides.
Authors: Rassadin Valentin A. , Grosheva Daria S. , Arefeva Irina A. , Tomashevskiy Aleksandr A. , Sokolov Victor V. , de Meijere Armin 
Published: March 2013

AbstractThe present new method constitutes a simple and efficient route to thiazine and thiazole derivatives.
ChemInform Abstract: Halogenation of Primary Alcohols Using a Tetraethylammonium Halide/[Et2NSF2]BF4 Combination.
Authors: Pouliot Marie‐France , Mahe Olivier , Hamel Jean‐Denys , Desroches Justine , Paquin Jean‐Francois 
Published: March 2013

AbstractThe procedure provides an efficient method to prepare a number of primary chlorides, bromides, and iodides.
ChemInform Abstract: Electrophilic Trifluoromethanesulfanylation of Organometallic Species with Trifluoromethanesulfanamides.
Authors: Baert Francois , Colomb Julie , Billard Thierry 
Published: March 2013

AbstractThe sulfenamide (I) is reported as an excellent alternative for trifluoromethanesulfenyl chloride.
ChemInform Abstract: General and Efficient Method for Direct N‐Monomethylation of Aromatic Primary Amines with Methanol.
Authors: Li Feng , Xie Jianjiang , Shan Haixia , Sun Chunlou , Chen Lin 
Published: March 2013

AbstractAryl‐ and hetarylamines as well as arylsulfonamides are successfully treated with MeOH.
ChemInform Abstract: Highly Stable, Recyclable Copper Nanoparticles as Catalysts for the Formation of C—N Bonds.
Authors: Chen Bingfeng , Li Fengbo , Huang Zhijun , Xue Fei , Lu Tao , Yuan Yin , Yuan Guoqing 
Published: March 2013

AbstractThe catalyst system allows the N‐arylation of various amino alcohols including sterically crowded ones, of amides such as (IX) and of N‐heterocycles with bromoarenes bearing a chiral oxazolidine substituent.
ChemInform Abstract: Organocatalytic Michael Addition of Nitro Esters to α,β‐Unsaturated Aldehydes: Towards the Enantioselective Synthesis of trans‐3‐Substituted Proline Derivatives.
Authors: Han Man‐Yi , Zhang Yong , Wang Huai‐Zhen , An Wan‐Kai , Ma Bao‐Chun , Zhang Yuan , Wang Wei 
Published: March 2013

AbstractCompounds (III) are obtained as mixtures of diastereomers.
ChemInform Abstract: Organocatalytic One‐Pot Oxidative Cleavage of Terminal Diols to Dehomologated Carboxylic Acids.
Authors: Shibuya Masatoshi , Doi Ryusuke , Shibuta Takuro , Uesugi Shun‐ichiro , Iwabuchi Yoshiharu 
Published: March 2013

AbstractThe reaction proceeds without epimerization of adjacent stereocenters and several functional groups such as triple bonds, acetonides, ethers, and carbamates are tolerated.
ChemInform Abstract: Palladium‐Catalyzed Direct Arylation of Polyfluoroarenes with Aryl Tosylates and Mesylates.
Authors: Lee Dong Sheng , Choy Pui Ying , So Chau Ming , Wang Jun , Lau Chak Po , Kwong Fuk Yee 
Published: March 2013

AbstractThe process works well under mild conditions in the presence of a weak base without any additional additives.
ChemInform Abstract: Gallium Trichloride Catalyzed Hydroamination of Alkynes: Scope, Limitation, and Mechanistic Studies by DFT.
Authors: Li Lei , Huang Genping , Chen Zhou , Liu Wei , Wang Xiufang , Chen Yanmei , Yang Lijuan , Li Wu , Li Yahong 
Published: March 2013

AbstractThis reaction predominantly gives the Markovnikov hydroamination products.
ChemInform Abstract: Ligand‐Free Copper‐Catalyzed O‐Arylation of Nitroarenes with Phenols.
Authors: Chen Jiuxi , Wang Xingyong , Zheng Xingwang , Ding Jinchang , Liu Miaochang , Wu Huayue 
Published: March 2013

AbstractThe method affords unsymmetrical diaryl ethers in moderate to excellent yields.
ChemInform Abstract: General, Green, and Scalable Synthesis of Imines from Alcohols and Amines by a Mild and Efficient Copper‐Catalyzed Aerobic Oxidative Reaction in Open Air at Room Temperature.
Authors: Tian Haiwen , Yu Xiaochun , Li Qiang , Wang Jianxin , Xu Qing 
Published: March 2013

AbstractThis reaction tolerates a wide range of substrates and can be operated on a large scale.
ChemInform Abstract: Rhodium‐Catalyzed Synthesis of Diaryl Sulfides Using Aryl Fluorides and Sulfur/Organopolysulfides.
Authors: Arisawa Mieko , Ichikawa Takuya , Yamaguchi Masahiko 
Published: March 2013

AbstractRh‐catalyzed treatment of pentafluorobenzenes with S8 and di‐tert‐butyl tetrasulfide allows a convenient access to diaryl sulfides.
ChemInform Abstract: Regioselective ortho‐Arylation and Alkenylation of N‐Alkyl Benzamides with Boronic Acids via Ruthenium‐Catalyzed C—H Bond Activation: An Easy Route to Fluorenones Synthesis.
Authors: Chinnagolia Ravi Kiran , Jeganmohan Masilamani 
Published: March 2013

AbstractTreatment of aromatic amides with aryl and alkenyl boronic acids according to A) results in selective formation of ortho‐substituted products.
ChemInform Abstract: Cu(II)‐Catalyzed Synthesis of Naphthalene‐1,3‐diamine Derivatives from Haloalkynes and Amines.
Authors: Chen Zhengwang , Zeng Wei , Jiang Huanfeng , Liu Liangxian 
Published: March 2013

AbstractThe new and efficient approach to naphthalene‐1,3‐diamines proceeds via formation and dimerization of ynamines.
ChemInform Abstract: A Novel Base‐Promoted Cyclization: Synthesis of Substituted Benzo[b]furans.
Authors: Damera Krishna , Ke Bowen , Wang Ke , Dai Chaofeng , Wang Lifang , Wang Binghe 
Published: March 2013

AbstractThe method can be applied to a broad spectrum of phenols bearing alkyne chains in ortho‐position to produce highly functionalized benzofuran structures.
ChemInform Abstract: Rapid Synthesis of Substituted Pyrrolines and Pyrrolidines by Nucleophilic Ring Closure at Activated Oximes.
Authors: Chandan Nandkishor , Thompson Amber L. , Moloney Mark G. 
Published: March 2013

AbstractSubstituted pyrrolidines are synthesized by ring closure initiated by direct nucleophilic attack of stabilized enolates at the nitrogen of oximes (I), (IV), (VII) and (IX) activated with an appropriate leaving group.
ChemInform Abstract: Organocatalytic Mannich/Cyclization/Aromatization Sequence: Direct Synthesis of Substituted Pyrrole‐3‐carboxaldehydes.
Authors: Kumar Indresh , Mir Nisar A. , Ramaraju Panduga , Wakhloo Basant P. 
Published: March 2013

AbstractThe proline‐catalyzed direct Mannich reaction is followed by an acid‐promoted cyclization and an oxidative aromatization.
ChemInform Abstract: Synthesis of 2‐Azaspiro[4.6]undec‐7‐enes from N‐Tosyl‐N‐(3‐arylpropargyl)‐tethered 3‐Methylcyclohex‐2‐en‐1‐ols.
Authors: Yeh Ming‐Chang P. , Liang Chia‐Jung , Fan Chern‐Wei , Chiu Wei‐Hang , Lo Jun‐Yuan 
Published: March 2013

AbstractCyclopropanation of cyclohexenols of type (I) leads to bicycloheptanols like (III) whose reaction with FeCl3 allows a simple and mild access to azaspiroundecenes.
ChemInform Abstract: Two‐Step Synthesis of 2,3‐Dihydropyrroles via a Formal 5‐endo Cycloisomerization of Ugi 4‐CR/Propargyl Adducts.
Authors: Polindara‐Garcia Luis A. , Miranda Luis D. 
Published: March 2013

AbstractIn some cases, 2,5‐dihydropyrroles are also obtained.
ChemInform Abstract: Broensted Acid Promoted Divergent Reactions of Enaminones: Efficient Synthesis of Fused Pyrroles with Different Substitution Patterns.
Authors: Jiang Bo , Yi Mian‐Shuai , Tu Man‐Su , Wang Shu‐Liang , Tu Shu‐Jiang 
Published: March 2013

AbstractAcetic acid is used as a solvent and a Broensted acid to promote the reaction of arylglyoxals, enaminones and mercaptans.
ChemInform Abstract: Regioselectivity‐Reversed Asymmetric Aldol Reaction of 1,3‐Dicarbonyl Compounds.
Authors: Liu Hongxin , Wu Huayue , Luo Zhenli , Shen Jie , Kang Guowei , Liu Bidai , Wan Zhifu , Jiang Jun 
Published: March 2013

AbstractThe first organocatalytic asymmetric C1 aldol reaction of 1,3‐dicarbonyl compounds to isatins and dihydrofurandiones is presented.
ChemInform Abstract: Multicomponent Assembly of Highly Substituted Indoles by Dual Palladium‐Catalyzed Coupling Reactions.
Authors: Knapp John M. , Zhu Jie S. , Tantillo Dean J. , Kurth Mark J. 
Published: March 2013

AbstractThe three‐component reaction of o‐bromoiodoarenes, primary amines and ketones or aldehydes involves a Buchwald—Hartwig reaction and an arene—alkane coupling to produce different types of the desired heterocyclic system.
ChemInform Abstract: Regioselective Formylation of 1‐(2‐Oxiranylmethyl)‐4,5,6,7‐tetrahydroindole with DMF/(COCl)2: The Pyrrole vs. Oxirane Nucleophilicity.
Authors: Ivanov Andrei V. , Ushakov Igor A. , Markova Marina V. , Falicheva Svetlana Yu. , Mikhaleva Al'bina I. , Trofimov Boris A. 
Published: March 2013

AbstractTreatment of the title oxiranylmethylindole (I) with the formylating reagent system DMF/(COCl)2 starts with oxirane ring opening [→(II)] followed by formylation of the pyrrole ring [→(IV)] and ends with the rather unexpected formylation of the hydroxy group in (IV) [→(V)].
ChemInform Abstract: A Highly Efficient and Aerobic Protocol for the Synthesis of N‐Heteroaryl Substituted 9‐Arylcarbazolyl Derivatives via a Palladium‐Catalyzed Ligand‐Free Suzuki Reaction.
Authors: Rao Xiaofeng , Liu Chun , Qiu Jieshan , Jin Zilin 
Published: March 2013

AbstractMoreover, the catalytic system is successfully extended to the cross‐coupling of N‐heteroaryl halide (VII) and various aryl boronic acids (VI).
ChemInform Abstract: Gallium(III)‐Catalyzed Three‐Component [4 + 3] Cycloaddition Reactions.
Authors: Han Xinping , Li Hui , Hughes Russell P. , Wu Jimmy 
Published: March 2013

AbstractA variety of biologically important cyclohepta[b]indole derivative is prepared via regio‐ and diastereoselective cycloaddition of indolyl cations with dienes.
ChemInform Abstract: A Simple Phosphine—Diolefin‐Promoted Copper‐Catalyzed N‐Arylation of Pyrazoles with (Hetero)aromatic Bromides: The Case of Chloroarenes Revisited.
Authors: Rampazzi Vincent , Massard Alexandre , Richard Phillippe , Picquet Michel , Le Gendre Pierre , Hierso Jean‐Cyrille 
Published: March 2013

AbstractThe combination of cubane (I)/PPH is found to catalyze the coupling of aryl and heteroaryl bromides with pyrazole (II) and its derivatives (V) under mild conditions.
ChemInform Abstract: Asymmetric Catalytic [4 + 1] Annulations Catalyzed by Quinidine: Enantioselective Synthesis of Multi‐Functionalized Isoxazoline N‐Oxides.
Authors: Guo Zhi‐Wei , Xie Jian‐Wu , Chen Ce , Zhu Wei‐Dong 
Published: March 2013

AbstractQuinidine is proved to be the most efficient organocatalyst for the synthesis s of title compounds which are obtained mostly with high diastereo‐ and enantioselectivities.
ChemInform Abstract: Cu(acac)2 Catalyzed Oxidative C—H Bond Amination of Azoles with Amines under Base‐Free Conditions.
Authors: Wagh Yogesh S. , Bhanage Bhalchandra M. 
Published: March 2013

AbstractA direct oxidative C‐H bond amination of azoles with aliphatic and aromatic amines is achieved using the copper‐bis‐acetylacetonate complex as a catalyst.
ChemInform Abstract: Synthesis and Molecular Structure of Novel 2‐(Alkylthio)‐4‐chloro‐N‐ (4,5‐dihydro‐5‐oxo‐1H‐1,2,4‐triazol‐3‐yl)‐5‐methylbenzenesulfonamides with Potential Anticancer Activity.
Authors: Slawinski Jaroslaw , Zolnowska Beata , Orlewska Czeslawa , Chojnacki Jaroslaw 
Published: March 2013

AbstractNew compound (Ie) shows high activities against 13 human tumor cell lines representing lung, colon, CNS, melanoma, ovarian, renal, prostate, and breast.
ChemInform Abstract: Design, Synthesis and Biological Activity Evaluation of 2,5‐Diphenyl‐1,3,4‐oxadiazole Derivatives as Novel Inhibitors of Fructose‐1,6‐bisphosphatase.
Authors: He Hai‐Bing , Gao Li‐Xin , Zhou Yue‐Yang , Liu Ting , Tang Jie , Gong Xue‐Ping , Qiu Wen‐Wei , Li Jing‐Ya , Li Jia , Yang Fan 
Published: March 2013

AbstractCompound (Ia) is discovered as a potential FBPase inhibitor by high‐throughput screening of a library of 56,000 lead‐like compounds.
ChemInform Abstract: Organocatalytic Asymmetric anti‐Selective Michael Reactions of Aldehydes and the Sequential Reduction/Lactonization/Pauson—Khand Reaction for the Enantioselective Synthesis of Highly Functionalized Hydropentalenes.
Authors: Hong Bor‐Cherng , Dange Nitin S. , Yen Po‐Jen , Lee Gene‐Hsiang , Liao Ju‐Hsiou 
Published: March 2013

AbstractIn the presence of DBU and the prolinol derivative, unsaturated aldehydes undergo asymmetric anti‐selective Michael addition to malonates of type (VI).
ChemInform Abstract: Facile Assembly of Indeno[1,2‐c]chromenes via a Palladium‐Catalyzed Reaction of 2‐Alkynylhalobenzene.
Authors: Pan Xiaolin , Nie Hongming , Luo Yong , Gao Yueqiu , Wu Jie 
Published: March 2013

Abstract2‐Alkynylbromobenzenes (I) react with 2‐alkynylphenols (IV) in the presence of a Pd catalyst, leading to title compounds (V) in high yields.
ChemInform Abstract: Rhodium/Diene‐Catalyzed Asymmetric Arylation of N‐Boc‐Protected α,β‐Unsaturated δ‐Lactam with Arylboronic Acids: Enantioselective Synthesis of 4‐Aryl‐2‐piperidinones.
Authors: He Zhi‐Tao , Wei Ya‐Bing , Yu Hong‐Jie , Sun Cai‐Yun , Feng Chen‐Guo , Tian Ping , Lin Guo‐Qiang 
Published: March 2013

AbstractTitle compounds (III) and (V) are prepared in high yields and enantioselectivities.
ChemInform Abstract: Novel Synthesis of Some New Fluorescent 2‐Amino‐3‐cyanopyridines
Authors: Zonouzi Afsaneh , Izakian Zakieh , Ng Seik Weng 
Published: March 2013

Abstractvia one‐pot three‐component condensation of acetylacetone, malononitrile, and different amines in the presence of N‐hydroxybenzamide or p‐toluenesulfonic acid
ChemInform Abstract: Facile Synthesis of Dispirooxindole‐Fused Heterocycles via Domino 1,4‐Dipolar Addition and Diels—Alder Reaction of in situ Generated Huisgen 1,4‐Dipoles.
Authors: Sun Jing , Sun Yan , Gong Hui , Xie Ya‐Jing , Yan Chao‐Guo 
Published: March 2013

AbstractTreatment of the aminopyridine (I) with acetylenedicarboxylates and N‐substituted acylidineoxindoles allows an efficient and stereoselective access to novel spirocyclic compounds of type (IV) and (VI).
ChemInform Abstract: An Efficient Synthesis of Pyrrolo[3′,2′:4,5]thiopyrano[3,2‐b]pyridin‐2‐one: A New Ring System of Pharmaceutical Interest.
Authors: Barraja Paola , Diana Patrizia , Spano Virginia , Montalbano Alessandra , Carbone Anna , Parrino Barbara , Cirrincione Girolamo 
Published: March 2013

AbstractDerivatives of the title ring system are screened for their inhibitory activity against 60 human cancer cell lines.
ChemInform Abstract: Synthesis and Physicochemical Characterization of Novel 6‐Aminopyrido[3,4‐c][1,9]phenanthrolines as Aza‐Analogues of Benzo[c]phenanthridines.
Authors: Meier Christopher , Kotthaus Joscha , Stenzel Lars , Girreser Ulrich , Heber Dieter , Clement Bernd 
Published: March 2013

AbstractThis work contains information on lipophilicity, solubility, drug‐likeness, and cytotoxicity of the synthesized compounds.
ChemInform Abstract: Three‐Component Heterocyclization of gem‐Bromofluorocyclopropanes with NOBF4: Access to 4‐Fluoropyrimidine N‐Oxides.
Authors: Sedenkova Kseniya N. , Averina Elena B. , Grishin Yuri K. , Kutateladze Andrei G. , Rybakov Victor B. , Kuznetsova Tamara S. , Zefirov Nikolay S. 
Published: March 2013

AbstractThe reaction in nitrile solvents results in a new, unexpected formation of 4‐fluoropyrimidine N‐oxides.
ChemInform Abstract: Route Selection in the Synthesis of C—4 and C—6 Substituted Thienopyrimidines.
Authors: Bugge Steffen , Kaspersen Svein Jacob , Sundby Eirik , Hoff Baard Helge 
Published: March 2013

AbstractDifferent routes towards title compounds (III) and (VI) starting from dihalogenated thienopyrimidine (I) are developed.
ChemInform Abstract: Palladium‐Catalyzed Direct C—H Arylation of Thieno[3,4‐b]pyrazines: Synthesis of Advanced Oligomeric and Polymeric Materials.
Authors: Abdo Nabiha I. , El‐Shehawy Ashraf A. , El‐Barbary Ahmed A. , Lee Jae‐Suk 
Published: March 2013

AbstractCompounds (I) can be synthesized from easily available starting materials via established C—C coupling reactions.
ChemInform Abstract: Syntheses of Novel Diaryl[d,f][1,3]diazepines via One‐Pot Suzuki Coupling Followed by Direct Ring Closure with Carboxylic Acids.
Authors: Yan Longjia , Che Xin , Bai Xu , Pei Yazhong 
Published: March 2013

AbstractSeveral diazepines are synthesized starting from bromoanilines, chloronitropyridines, and carboxylic acids.
ChemInform Abstract: Gold(I)‐Catalyzed Cyclodehydration Enabled by the Triisopropylsilyl Group: A Synthetically Versatile Methodology.
Authors: Usanov Dmitry L. , Naodovic Marina , Brasholz Malte , Yamamoto Hisashi 
Published: March 2013

AbstractThe mild, robust, and operationally convenient method provides an easy access to a library of polycyclic systems including minimally functionalized benzofulvenes of type (XI).
ChemInform Abstract: Synthesis and Biological Evaluation of Novel 3′‐Difluorovinyl Taxoids.
Authors: Ojima Iwao , et al. et al. 
Published: March 2013

AbstractA series of 3′‐difluorovinyl taxoids (I) with C10 modifications, as well as those with C2 and C10 modifications, are designed and synthesized.
ChemInform Abstract: Novel Cytotoxic Phenanthrenequinone from Odontioda Marie Noel “Velano”.
Authors: Masuda Yuko , Suzuki Ryuichiro , Sakagami Hiroshi , Umemura Naoki , Shirataki Yoshiaki 
Published: March 2013

AbstractA new phenanthrenequinone (I) is isolated together with known ephemeranthoquinone B.
ChemInform Abstract: Organocatalyzed Enantioselective Desymmetrization of Diols in the Preparation of Chiral Building Blocks
Authors: Diaz‐de‐Villegas Maria D. , Galvez Jose A. , Badorrey Ramon , Lopez‐Ram‐de‐Viu M. Pilar 
Published: March 2013

AbstractReview: 49 refs.
Synthesis and Characterization of Azidobipyridyl Ruthenium Complexes and Their “Click” Chemistry Derivatives
Authors: Uppal Baljinder S. , Zahid Adam , Elliott Paul I. P. 
Published: March 2013

AbstractThe ligand 4‐azido‐2,2′‐bipyridyl (1) has been used to prepare 1,2,3‐triazole‐substituted ligands through copper‐catalyzed alkyne/azide cycloaddition (CuAAC or “click” chemistry) with phenylacetylene, ethynylferrocene and 2‐ethynylpyridine to yield 4‐(4‐phenyl‐1,2,3‐triazol‐1‐yl)‐2,2′‐bipyridyl (2a), 4‐(4‐ferrocenyl‐1,2,3‐triazol‐1‐yl)‐2,2′‐bipyridyl (2b) and 4‐[4‐(pyridyl‐2‐yl)‐1,2,3‐triazol‐1‐yl]‐2,2′‐bipyridyl (2c). Complexes of the form [Ru(p‐cymene)(Cl)(L)]PF6 (3, L = 1; 4a, L = 2a; 4b, L = 2b) were then prepared and characterized. We also report the synthesis of the complex of the analogous ligand 4,4′‐bisazido‐2,2′‐bipyridyl (1′), [Ru(p‐cymene)(Cl)(1′)]PF6 (3′). Complexes 4a and 4b were also prepared by an alternative route, whereby 3 undergoes CuAAC coupling with phenylacetylene and ethynylferrocene respectively. Complexes prepared with ligands that are pre‐assembled or “clicked” at the metal show identical 1H NMR spectra. CuAAC coupling of 3 and 2‐ethynylpyridine results in the formation of the complex [Ru(p‐cymene)(Cl)(2c)]PF6 (4c), which contains a coordinatively vacant pyridyltriazole moiety. The reaction of [Ru(p‐cymene)(Cl)2]2 with pre‐assembled 2c results in the formation of the dinuclear complex [{Ru(p‐cymene)(Cl)}2(2c)]·2PF6 (5), which incorporates ruthenium atoms at both bipyridyl and pyridyltriazole binding domains. The 1H NMR spectrum of the complex shows two signals for the triazole ring proton as well as duplicate signals for other protons of the bridging ligand, which indicates that 5 is produced as a mixture of diastereoisomers. The complex [{Ru(p‐cymene)Cl}2{di‐4‐([1‐{2,2′‐bipyrid‐4‐yl}triazol‐4‐yl]methyl)ether}][PF6]2 (7) was also prepared through the coupling of 3 with dipropargyl ether.
Organoaluminum and ‐gallium Formamidinate Complexes
Authors: Hamidi Shima , Dietrich H. Martin , Werner Daniel , Jende Lars N. , Maichle‐Mössmer Cäcilia , Törnroos Karl W. , Deacon Glen B. , Junk Peter C. , Anwander Reiner 
Published: March 2013

AbstractDialuminum formamidinate complexes [Me2Al(μ‐Form)(μ‐Me)AlMe2] [Form (ArNCHNAr) = EtForm (Ar = 2,6‐Et2C6H3) or DippForm (Ar = 2,6‐iPr2C6H3)] were obtained in good yields by treatment of formamidines (FormH) with trimethylaluminum in a 1:3 stoichiometry. The products contain both a bridging Form ligand and a bridging methyl group between the two aluminum centers. [M(Form)Me2] (M = Al, Form = DippForm, EtForm; M = Ga, Form = DippForm) were prepared in high yields by the protonolysis reactions of MMe3 (M = Al, Ga) with formamidines (FormH) in a 1:1 stoichiometry. [Al(DippForm)Me2] was also synthesized by other methods including concentration of the tetrahydrofuran/n‐hexane solution of [Me2Al(μ‐DippForm)(μ‐Me)AlMe2] to dryness and also by reaction of AlMe3 with [Ga(DippForm)Me2] in a 1:1 ratio. Partial dissociation of the dialuminum to monoaluminum complexes was detected in the 1H NMR spectra of [Me2Al(μ‐Form)(μ‐Me)AlMe2] complexes. All complexes exhibit a distorted tetrahedral stereochemistry of the Group 13 metal atoms.
Synthesis of Pure Lithium Amide Nanoparticles
Authors: Baldissin Gael , Boag Neil M. , Tang Chiu C. , Bull Daniel J. 
Published: March 2013

AbstractDeprotonation of ammonia with n‐butyllithium offers a facile synthetic route to produce pure lithium amide exhibiting fine granularity, which facilitates the complete thermal decomposition to lithium imide at a relatively low temperature of 600 K. Synthesised compounds were characterised by high‐resolution synchrotron X‐ray diffraction, and the particle morphology of lithium amide was studied by transmission electron microscopy. The proposed methodology readily affords the production of pure lithium amide nanoparticles at both bench‐top and commercial scale.