bluuebunny/crossref_metadata_2025_split huggingface dataset:
[Ir(PCy3)2(H)2(H2BNMe2)]+ as a Latent Source of Aminoborane: Probing the Role of Metal in the Dehydrocoupling of H3B⋅NMe2H and Retrodimerisation of [H2BNMe2]2
Authors: Stevens Charlotte J. , Dallanegra Romaeo , Chaplin Adrian B. , Weller Andrew S. , Macgregor Stuart A. , Ward Bryan , McKay David , Alcaraz Gilles , Sabo‐Etienne Sylviane 
Published: February 2011

AbstractThe IrIII fragment {Ir(PCy3)2(H)2}+ has been used to probe the role of the metal centre in the catalytic dehydrocoupling of H3B⋅NMe2H (A) to ultimately give dimeric aminoborane [H2BNMe2]2 (D). Addition of A to [Ir(PCy3)2(H)2(H2)2][BArF4] (1; ArF=(C6H3(CF3)2), gives the amine‐borane complex [Ir(PCy3)2(H)2(H3B⋅NMe2H)][BArF4] (2 a), which slowly dehydrogenates to afford the aminoborane complex [Ir(PCy3)2(H)2(H2BNMe2)][BArF4] (3). DFT calculations have been used to probe the mechanism of dehydrogenation and show a pathway featuring sequential BH activation/H2 loss/NH activation. Addition of D to 1 results in retrodimerisation of D to afford 3. DFT calculations indicate that this involves metal trapping of the monomer–dimer equilibrium, 2 H2BNMe2 ⇌ [H2BNMe2]2. Ruthenium and rhodium analogues also promote this reaction. Addition of MeCN to 3 affords [Ir(PCy3)2(H)2(NCMe)2][BArF4] (6) liberating H2BNMe2 (B), which then dimerises to give D. This is shown to be a second‐order process. It also allows on‐ and off‐metal coupling processes to be probed. Addition of MeCN to 3 followed by A gives D with no amine‐borane intermediates observed. Addition of A to 3 results in the formation of significant amounts of oligomeric H3B⋅NMe2BH2⋅NMe2H (C), which ultimately was converted to D. These results indicate that the metal is involved in both the dehydrogenation of A, to give B, and the oligomerisation reaction to afford C. A mechanism is suggested for this latter process. The reactivity of oligomer C with the Ir complexes is also reported. Addition of excess C to 1 promotes its transformation into D, with 3 observed as the final organometallic product, suggesting a BN bond cleavage mechanism. Complex 6 does not react with C, but in combination with B oligomer C is consumed to eventually give D, suggesting an additional role for free aminoborane in the formation of D from C.
ChemInform Abstract: Superconductors of SmFe1‐xCoxAsO Synthesized by Mechanical Alloying.
Authors: Yang Zhongtian , Liu Zhanqiang , Fang Aihua , Huang Fuqiang , Xie Xiaoming 
Published: February 2011

AbstractTitle compounds with x = 0—0.25 are synthesized by mechanical alloying of SmAs, Co2O3, Fe, and Fe2O3 followed by annealing (silica tubes, 1433 K, 3 h).
ChemInform Abstract: Synthesis, Structural Characterization and Physical Properties of a New Member of Ternary Lithium Layered Compounds — Li2RhO3
Authors: Todorova Vanya , Jansen Martin 
Published: February 2011

AbstractLi2RhO3 is synthesized by solid state reaction of a stoichiometric mixture of RhO2 and LiOH (O2 flow, 1123 K, 48 h) and characterized by powder XRD, AC impedance spectroscopy, and magnetic measurements.
ChemInform Abstract: Metal‐Free Catalytic Reduction of Aldehydes, Ketones, Aldimines, and Ketimines.
Authors: Matsuoka Hiroaki , Kondo Kazuhiro 
Published: February 2011

AbstractTris(pentafluorophenyl)borane in combination with PPh3 efficiently catalyzes the reduction with phenylsilane to afford the corresponding alcohols and amines in good yields.
ChemInform Abstract: Cationic Iridium Complex Is a New and Efficient Lewis Acid Catalyst for Aldol and Mannich Reactions.
Authors: Onodera Gen , Toeda Takayuki , Toda Nou‐no , Shibagishi Daigo , Takeuchi Ryo 
Published: February 2011

AbstractMukaiyama aldol reaction of aromatic (II), (XIII) and aliphatic aldehydes (IV) and acetal (VIII) with silyl enol ethers, e.g. (I) and (XII), is efficiently catalyzed by the cationic [Ir(cod)2]SbF6 complex (0.5mol%).
ChemInform Abstract: Efficient Ring‐Closing Metathesis of Alkenyl Bromides: The Importance of Protecting the Catalyst During the Olefin Approach.
Authors: Gatti Michele , Drinkel Emma , Wu Linglin , Pusterla Ivano , Gaggia Fiona , Dorta Reto 
Published: February 2011

AbstractIntroduction of a (Z)‐phenyl group into alkenyl bromides as well as alkenyl chlorides allows efficient ring‐closing metathesis yielding synthetically important cyclic haloalkenes.
ChemInform Abstract: Metal Benzenesulfonates/Acetic Acid Mixtures as Novel Catalytic Systems: Application to the Protection of a Hydroxyl Group.
Authors: Wang Min , Gao Jingjing , Song Zhiguo 
Published: February 2011

AbstractA surprising synergistic effect is observed when metal benzenesulfonates (Co, Al, Ni etc.) and acetic acid are used as catalytic system for the tetrahydropyranylation of alcohols or phenols.
ChemInform Abstract: A Double Oxidation Procedure for the Preparation of Halogen‐Substituted para‐Benzoquinone Monoketals: Asymmetric Synthesis of (‐)‐Harveynone.
Authors: Hookins Daniel R. , Taylor Richard J. K. 
Published: February 2011

AbstractIt is demonstrated, that a range of target compounds can be readily accessed in a regioselective manner using PIDA as the oxidant.
ChemInform Abstract: Selective Aerobic Oxidation of Sulfides to Sulfoxides Catalyzed by Coenzyme NAD+ Models.
Authors: Xu Hua‐Jian , Lin Yi‐Cheng , Wan Xin , Yang Chun‐Yan , Feng Yi‐Si 
Published: February 2011

AbstractChemoselective oxidation of aromatic sulfides towards sulfoxides is smoothly achieved using oxygen as oxidant and an NAD+ model as organocatalyst.
ChemInform Abstract: One‐Pot Synthesis of Stilbenes by Dehydrohalogenation—Heck Olefination and Multicomponent Wittig—Heck Reaction.
Authors: Sayed Akeel S. , Bedekar Ashutosh V. 
Published: February 2011

AbstractStyrene derivatives are generated in situ, either by dehydrohalogenation of bromides or Wittig reaction of phosphonium salts with aromatic aldehydes or paraformaldehyde.
ChemInform Abstract: Chiral Diene as the Ligand for the Synthesis of Axially Chiral Compounds via Palladium‐Catalyzed Suzuki—Miyaura Coupling Reaction.
Authors: Zhang Shu‐Sheng , Wang Zhi‐Qian , Xu Ming‐Hua , Lin Guo‐Qiang 
Published: February 2011

AbstractExcellent yields and good enantioselectivities of chiral biaryls are obtained by the atroposelective reaction, catalyzed by the system I*/II*.
ChemInform Abstract: Enantioselective Formal [2 + 2] Cycloaddition of Ketenes with Nitroso Compounds Catalyzed by N‐Heterocyclic Carbenes.
Authors: Wang Tong , Huang Xue‐Liang , Ye Song 
Published: February 2011

AbstractDPT is effective in the reaction of the aryl(alkyl)ketenes with a nitroso compound (II).
ChemInform Abstract: Chiral Broensted Acid Catalyzed Enantioselective Friedel—Crafts Reaction of 4,7‐Dihydroindoles with Trifluoromethyl Ketones.
Authors: Wang Teng , Zhang Guang‐Wu , Teng Yuou , Nie Jing , Zheng Yan , Ma Jun‐An 
Published: February 2011

AbstractIn the presence of a chiral phosphoric acid, reaction of substrates (I) with aromatic trifluoromethyl ketones (II) and ethyl 4,4,4‐trifluoroacetoacetate (V) gives 2‐substituted 4,7‐dihydroindoles with a trifluoromethylated tertiary alcohol moiety.
ChemInform Abstract: Synthesis of Novel Spiroheterocycles Through 1,3‐Dipolar Cycloaddition of Azomethine Ylides with Triarylideneacetylacetone Through Decarboxylation.
Authors: Murugan Ramalingam , Raghunathan R. , Narayanan S. Sriman 
Published: February 2011

AbstractAn efficient and stereoselective one‐pot, three‐component tandem reaction is presented.
ChemInform Abstract: Pyrolysis of Enaminone Derivatives of 1,2‐Ethylenediamine
Authors: Kukharev B. F. , Stankevich V. K. , Klimenko G. R. , Lobanova N. A. , Stankevich V. V. , Volkov G. A. 
Published: February 2011

Abstractleading to dihydroimidazole derivatives
ChemInform Abstract: Catalytic Asymmetric Formal [4 + 1] Annulation Leading to Optically Active cis‐Isoxazoline N‐Oxides.
Authors: Shi Zugui , Tan Bin , Leong Wendy Wen Yi , Zeng Xiaofei , Lu Min , Zhong Guofu 
Published: February 2011

AbstractThe organocatalytic asymmetric annulation of 2‐nitroacrylates with α‐iodoaldehydes leads to the highly stereoselective synthesis of valuable cis‐isoxazoline N‐oxides.
ChemInform Abstract: Synthesis and Anticancer Evaluation of Thiazolyl‐Chalcones.
Authors: Shi Hai‐Bo , Zhang Shi‐Jie , Ge Qiu‐Fu , Guo Dian‐Wu , Cai Chao‐Ming , Hu Wei‐Hiao 
Published: February 2011

AbstractA series of thiazolyl‐chalcones (V) (37 examples) is designed, synthesized via a Claisen—Schmidt condensation, and evaluated for their anticancer activity.
ChemInform Abstract: One‐Pot Synthesis of Functionalized 2H‐Chromene (=2H‐1‐Benzopyran) Derivatives via a Three‐Component Reaction Between a CH‐Acid, a Dialkyl Acetylenedicarboxylate, and Methyl Chloroglyoxylate or Benzyl Carbonochloridate Mediated by Triphenylphosphine.
Authors: Bayat Mohammad , Shiraz Nader Zabarjad , Asayesh Soheila Shafei 
Published: February 2011

AbstractThe title process is based on the initial formation of a reactive 1,1‐diactivated alkene from dimedone or dimethylbarbituric acid and carbonyl compounds (II) followed by a intramolecular Wittig‐type ring closure.
ChemInform Abstract: Synthesis of New 6‐(4‐Fluorophenyl)‐5‐(2‐substituted pyrimidin‐4‐yl)imidazo[2,1‐b]thiazole Derivatives and Their Antiproliferative Activity Against Melanoma Cell Line.
Authors: Park Jin‐Hun , Oh Chang‐Hyun 
Published: February 2011

AbstractTitle compounds, e.g. (VIII), are investigated for their antiproliferative activity against A375 human melanoma cell lines.
ChemInform Abstract: 1,2,3,6‐Tetrahydropyrrolo[1,2‐d][1,4]diazocines. Reactions of 1‐Methyl‐2‐R‐tetrahydropyrrrolo[1,2‐a]pyrazines with Alkynes.
Authors: Voskressensky L. G. , Borisova T. N. , Kamalitdinova T. M. , Titov A. A. , Listratova A. V. , Varlamov A. V. 
Published: February 2011

AbstractReactions of the title tetrahydropyrrolo[1,2‐a]pyrazines with activated alkynes provides ring‐opening products, i.e.
ChemInform Abstract: Me3SiCl‐Promoted Intramolecular Cyclization of Aromatic Compounds Tethered with N,O‐Acetals Leading to the Facile Preparation of 1,4‐Benzodiazepine Skeletons.
Authors: Sakai Norio , Watanabe Akimasa , Ikeda Reiko , Nakaike Yumi , Konakahara Takeo 
Published: February 2011

AbstractIntramolecular aminomethylation of aromatic rings with N,O‐acetals tethered via an amine, e.g. (I), (III) or (V), proceeds smoothly in the presence of TmsCl under mild conditions to give a variety of benzodiazepine derivatives.
ChemInform Abstract: Synthesis and Antibacterial Studies of Azodispersed Dyes Derived from 2‐(Thiazol‐2‐yl)phthalazine‐1,4‐diones.
Authors: Khalil A. M. , Berghot M. A. , Gouda M. A. , El Bialy S. A. 
Published: February 2011

AbstractA simple and convenient route for the synthesis of new azo dyes (III) (14 examples) based on phthalazine is reported.
ChemInform Abstract: Molecular Iodine Promoted N‐ and C‐Glycosylation of 1‐C‐Alkyl (or Phenyl)‐glycopyranoses.
Authors: Pal A. P. John , Mallick Asadulla , Reddy Y. Suman , Vankar Yashwant D. 
Published: February 2011

AbstractTreatment of various D‐glucose and D‐galactose substrates with Tms‐N3 or Tms‐CN affords the desired title compounds as synthons for peptide mimics.
ChemInform Abstract: Daphlongamines I and J. New Yuzurine‐Type Alkaloids from Daphniphyllum longeracemosum
Authors: Li Chun‐Shun , Di Ying‐Tong , Guo Jie , Zhang Qiang , Fang Xin , Hao Xiao‐Jiang 
Published: February 2011

Abstractisolation and structure elucidation
ChemInform Abstract: Variable Nuclearity Scorpionate‐Supported Lanthanide Polyhydrides: [(TpR,R′) LnH2]n (n: 3,4 and 6)
Authors: Cheng Jianhua , Saliu Kuburat , Ferguson Michael J. , McDonald Robert , Takats Josef 
Published: February 2011

AbstractReview: 28 refs.
Multiple Charge‐Separation Pathways in Photosystem II: Modeling of Transient Absorption Kinetics
Authors: Novoderezhkin Vladimir I. , Romero Elisabet , Dekker Jan P. , van Grondelle Rienk 
Published: February 2011

AbstractWe explain the transient absorption kinetics (E. Romero, I. H. M. van Stokkum, V. I. Novoderezhkin, J. P. Dekker, R. van Grondelle, Biochemistry 2010, 49, 4300) measured for isolated reaction centers of photosystem II at 77 K upon excitation of the primary donor band (680 nm). The excited‐state dynamics is modeled on the basis of the exciton states of 6 cofactors coupled to 4 charge‐transfer (CT) states. One CT state (corresponding to charge separation within the special pair) is supposed to be strongly coupled with the excited states, whereas the other radical pairs are supposed to be localized. Relaxation within the strongly coupled manifold and transfer to localized CT’s are described by the modified Redfield and generalized Förster theories, respectively. A simultaneous and quantitative fit of the 680, 545, and 460 nm kinetics (corresponding to respectively the Qy transitions of the red‐most cofactors, Qx transition of pheophytin, and pheophytin anion absorption) enables us to define the pathways and time scales of primary electron transfer. A consistent modeling of the data is only possible with a Scheme where charge separation occurs from both the accessory chlorophyll and from the special pair, giving rise to fast and slow components of the pheophytin anion formation, respectively.
Subcritical Water as Reaction Environment: Fundamentals of Hydrothermal Biomass Transformation
Authors: Möller Maria , Nilges Peter , Harnisch Falk , Schröder Uwe 
Published: February 2011

AbstractSubcritical water, that is, water above the boiling and below critical point, is a unique and sustainable reaction medium. Based on its solvent properties, in combination with the often considerable intrinsic water content of natural biomass, it is often considered as a potential solvent for biomass processing. Current knowledge on biomass transformation in subcritical water is, however, still rather scattered without providing a consistent picture. Concentrating on fundamental physical and chemical aspects, this review summarizes the current state of knowledge of hydrothermal biomass conversion in subcritical water. After briefly introducing subcritical water as a reaction medium, its advantages for biomass processing compared to other thermal processes are highlighted. Subsequently, the physical‐chemical properties of subcritical water are discussed in the light of their impact on the occurring chemical reactions. The influence of major operational parameters, including temperature, pressure, and reactant concentration on hydrothermal biomass transformation processes are illustrated for selected carbohydrates. Major emphasis is put on the nature of the carbohydrate monomers, since the conversion of the respective polymers is analogous with the additional prior step of hydrolytic depolymerization.
Comparison of the quality of smears in transbronchial fine‐needle aspirates using two staining methods for rapid on‐site evaluation
Authors: Louw Mercia , Brundyn Karen , Schubert Pawel T. , Wright Colleen A. , Bolliger Chris T. , Diacon Andreas H. 
Published: February 2011

AbstractTransbronchial needle aspiration (TBNA) via flexible bronchoscopy is a well‐established sampling modality for lung masses. The procedure is useful in the diagnosis of neoplastic and non‐neoplastic lesions as well as for staging of bronchogenic carcinoma. Rapid on‐site evaluation (ROSE) adds value as it has the advantage of triaging material during the procedure so avoiding a battery of investigations. Frequently used rapid stains are the modified Wright‐Giemsa water‐based stain (WG‐ROSE) and the alcohol‐based modified Papanicolaou stain (Pap‐ROSE). Final review of laboratory‐based Giemsa and Pap stains supplemented by ancillary investigations is essential for quality assurance. To investigate whether and how ROSE influenced the quantity and quality of the material submitted to the laboratory we randomized 126 patients to WG‐ROSE, requiring only one pathologist on‐site, or combined WG‐ and Pap‐ROSE, requiring an additional person on‐site to assist with staining. In those patients with positive TBNA we graded the laboratory‐based slides of the first pass containing diagnostic material into insufficient, suspicious, adequate and excellent. The first diagnostic pass was found after 3.06 ± 1.94 (SD) passes and 3.13 ± 2.16 passes with WG‐ROSE and combined ROSE (P = 0.87), respectively. Following WG‐ROSE and combined ROSE 69% and 71.1% (P = 0.509) of slides were diagnostic (adequate or excellent) on laboratory‐based Giemsa stains, and 93.3% and 100% (P = 0.134) were scored adequate or excellent on laboratory‐based Pap stains. We concluded that the less costly and labour intensive WG‐ROSE procedure is adequate for TBNA. This has cost implications especially in resource poor settings. Diagn. Cytopathol. 2012. © 2011 Wiley Periodicals, Inc.
Diagnosis of phosphaturic mesenchymal tumor (mixed connective tissue type) by cytopathology
Authors: William Josette , Laskin William , Nayar Ritu , de Frias Denise 
Published: February 2011

AbstractOncogenic osteomalacia (OO) is a rare paraneoplastic condition in which a bone or soft tissue tumor induces biochemical and clinical signs and symptoms of osteomalacia (or rickets) most often by the production of the phosphaturic protein, fibroblast growth factor‐23. Phosphaturic mesenchymal tumor, mixed connective tissue type (PMTMCT) is a rare, histologically distinct tumor that represents the most common cause of OO. As the clinical diagnosis of OO is typically suspected on the basis of clinical and biochemical features and the presence of a bone or soft tissue tumor, cytologic examination might potentially provide the necessary pathologic confirmation of OO. In this case of a 46‐year‐old female with clinical stigmata of OO and a right distal humeral mass, we report that the fine‐needle aspiration findings of short, cytologically bland spindled cells embedded in a fine, fibrillary stromal‐rich matrix and the presence of osteoclast‐type giant cells associated with the stromal matrix provide strong pathological evidence for PMTMCT and assist in pathologically confirming the clinical impression of OO, thus alleviating the need for a more invasive diagnostic surgical procedure Diagn. Cytopathol. 2012. © 2011 Wiley Periodicals, Inc.
Comparison of DSM‐IV versus proposed DSM‐5 diagnostic criteria for eating disorders: Reduction of eating disorder not otherwise specified and validity
Authors: Keel Pamela K. , Brown Tiffany A. , Holm‐Denoma Jill , Bodell Lindsay P. 
Published: February 2011

AbstractObjective:Revised Eating Disorder (ED) diagnostic criteria have been proposed for the Diagnostic and Statistical Manual (DSM)‐5 to reduce the preponderance of eating disorder not otherwise specified (EDNOS) and increase the validity of diagnostic groups. This article compares DSM‐IV and proposed DSM‐5 diagnostic criteria on number of EDNOS cases and validity.Method:Participants (N = 397; 91% female) completed structured clinical interviews in a two‐stage epidemiological study of EDs. Interviewers did not follow standard skip rules, making it possible to evaluate alternative ED diagnostic criteria.Results:Using DSM‐IV versus DSM‐5 criteria, 34 (14%) versus 48 (20%) had anorexia nervosa, 43 (18%) versus 44 (18%) had bulimia nervosa, and 163 (68%) had EDNOS versus 20 (8%) had binge eating disorder (BED), and 128 (53%) had EDNOS, respectively, reflecting a significant decrease in EDNOS. Validation analyses supported significant differences among groups with some improvement associated with delineation of BED.Discussion:Proposed revisions to EDs in the DSM‐5 significantly reduced reliance on EDNOS without loss of information. © 2011 by Wiley Periodicals, Inc.
Unconstrained respiration measurement and respiratory arrest detection by dynamic threshold in transferring patients by stretcher
Authors: Kurihara Yosuke , Watanabe Kajiro , Kobayashi Kazuyuki , Tanaka Hiroshi 
Published: February 2011

AbstractGeneral anesthesia used for surgery may cause an unstable postoperative condition of patients, which could lead to respiratory arrest. Under such circumstances, nurses could fail to recognize changes of condition, and other errors could also occur. It is highly possible that such errors may occur while transferring a patient from the ICU to the room on a stretcher. Monitoring the change in the blood oxygen saturation concentration and other vital signs to detect respiratory arrest is not easy when transferring a patient on a stretcher. We present several noise reduction systems and algorithms to detect respiratory arrest while transferring patients, based on the unconstrained air pressure method that the authors presented previously. It was found that when the stretcher noise was at an acceleration level of 0.5 G, the respiratory arrest detection ratio by this novel method was 65%, while that with the conventional method was 0%. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(3): 41–50, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10295
Effect of smell presentation on individuals with regard to eye catching and memory
Authors: Tomono Akira , Kanda Koyori , Otake Syunya 
Published: February 2011

AbstractIf a person's eyes are more strongly attracted to target objects by matching a smell to an important scene of a movie or a commercial image, the value of the image content will rise. In this paper, we attempt to describe an image system that can also present smells, and the reason for the improvement, as indicated by gaze point analysis, in the presence of smell that is matched to an image. The relationship between the eye‐catching ability and the position of the object of viewing was examined using images with a scene in which someone eats three kinds of fruits. These objects were gazed at for a long time on release of their scents. When the smell was not released, the gaze moved actively in an attempt to receive a lot of information from the entire screen. On the other hand, when the smell was inserted, the subjects became interested in the object and there was a tendency for their gaze to stay within the narrow area surrounding the image. We also investigated the effect on the memory of attaching smells to the flowers in a virtual flower shop by using an immersive virtual reality system (HoloStage™). Memorization was easier than with the scentless case. It appears that viewers obtain information actively by reacting to smell. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(3): 9–19, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10319
Decreasing the energy loss of magnetic domain‐wall motion with nonlinear control
Authors: Mizokami Junji , Okuno Hikaru 
Published: February 2011

AbstractChaos and control of Bloch wall motion is investigated. With respect to the frequency and drive force coefficient, the movement of the magnetic domain wall is found to become unstable in the vicinity of 2 MHz and 0.2 TA/m. It is shown that unstable magnetic domain‐wall motion can be stabilized and its energy loss can be decreased by using nonlinear feedback control. © 2011 Wiley Periodicals, Inc. Electron Comm Jpn, 94(3): 1–8, 2011; Published online in Wiley Online Library (wileyonlinelibrary.com). DOI 10.1002/ecj.10323
Restoring confidence at the Cancun Climate Change Conference
Authors: Cozier Muriel 
Published: February 2011

AbstractWith pressure high to secure agreement on limiting global temperature rises after a disappointing outcome in Copenhagen, the Cancun Climate Change Conference needed to succeed for the global framework to tackle climate change to stay on track. Although several commitments, including measures on reducing emissions in developing countries and on carbon capture and storage, were made, some business leaders and politicians had a more downbeat assessment of the achievements in Mexico. Muriel Cozier reports on the new challenges facing business and government after the close of the meeting. © 2011 Society of Chemical Industry and John Wiley & Sons, Ltd