bluuebunny/crossref_metadata_2025_split huggingface dataset:
Copper‐Catalyzed Enantioselective Intramolecular Conjugate Addition/Trapping Reactions: Synthesis of Cyclic Compounds with Multichiral Centers
Authors: Li Kangying , Alexakis Alexandre 
Published: January 2007

AbstractThe Cu‐catalyzed enantioselective conjugate addition of dialkylzinc to bis‐α,β‐unsaturated carbonyl compounds followed by the intramolecular trapping of the zinc enolate in the presence of chiral phosphoramidite ligands was investigated. Cyclic and heterocyclic compounds with multichiral centers were formed as a mixture of two diastereomers with excellent diastereoselectivities (up to 99:1) and enantioselectivities (up to 94 % ee, ee=enantiomeric excess). The stereochemistry was determined to be trans,trans for the major products and trans,cis for the minor products. The absolute configuration of the cyclic compounds was assigned by comparison with the analogous adduct derived from trans‐3‐nonen‐2‐one and Et2Zn or the adduct obtained through conjugate addition of Me2Zn to trans‐1‐phenyl‐non‐2‐en‐1‐one. Further transformation of these cyclic products into more complex compounds is under investigation in our laboratory.
Absorption, Light Emission, and Upconversion Properties of Tm2+‐Doped CsCaI3 and RbCaI3.
Authors: Beurer Eva , Grimm Judith , Gerner Pascal , Guedel Hans U. 
Published: January 2007

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, please click on HTML or PDF.
NaBH4/Charcoal: A New Synthetic Method for Mild and Convenient Reduction of Nitroarenes.
Authors: Zeynizadeh Behzad , Setamdideh Davood 
Published: January 2007

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, please click on HTML or PDF.
Efficient Demethylation of N,N‐Dimethylanilines with Phenyl Chloroformate in Ionic Liquids.
Authors: Imori Satomi , Togo Hideo 
Published: January 2007

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, please click on HTML or PDF.
An Easy and General Protocol for Multicomponent Coupling Reactions of Aldehydes, Amides, and Dienophiles.
Authors: Struebing Dirk , Neumann Helfried , Jacobi von Wangelin Axel , Klaus Stefan , Huebner Sandra , Beller Matthias 
Published: January 2007

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, please click on HTML or PDF.
A Mannich‐Type Reaction in Water Employing a Dendritic Copper(II) Triflate Catalyst: A Positive Dendritic Effect on Chemical Yield.
Authors: Muraki Takahito , Fujita Ken‐ichi , Terakado Dai 
Published: January 2007

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, please click on HTML or PDF.
CaCl2‐ or MgCl2‐Catalyzed Allylic Oxidations of Ionone‐Like Dienes.
Authors: Yang Min , Peng Qian‐Rong , Lan Jing‐Bo , Song Guang‐Fu , Xie Ru‐Gang 
Published: January 2007

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, please click on HTML or PDF.
Chemoselective Reduction of Aldehydes Using Decaborane in Aqueous Solution.
Authors: Lee Seung Hwan , Nam Mi Hye , Cho Min Young , Yoo Byung Woo , Rhee Hak June , Yoon Cheol Min 
Published: January 2007

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, please click on HTML or PDF.
Efficient Solvent‐Free Selective Monoalkylation of Arylacetonitriles with Mono‐, Bis‐, and Tris‐primary Alcohols Catalyzed by a Cp*Ir Complex.
Authors: Loefberg Christian , Grigg Ronald , Whittaker Mark A. , Keep Ann , Derrick Andrew 
Published: January 2007

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, please click on HTML or PDF.
New Method of Synthesizing N‐Alkoxycarbonyl‐N‐arylamide with Triphosgene.
Authors: Zhou Yuhan , Gong Runjun , Miao Weirong 
Published: January 2007

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, please click on HTML or PDF.
Oxidative Coupling Reaction of N,N‐Dialkylanilines with Cerium(IV) Ammonium Nitrate in the Solid State.
Authors: Yang Xianghua , Xi Chanjuan , Jiang Yanfeng 
Published: January 2007

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, please click on HTML or PDF.
Synthesis of Polycyclic Heterocycles via a One‐Pot ortho Alkylation/Direct Heteroarylation Sequence.
Authors: Martins Andrew , Alberico Dino , Lautens Mark 
Published: January 2007

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, please click on HTML or PDF.
Synthesis of 1‐Aryl‐1H‐indole Derivatives by Iodine‐Mediated Cyclization of 2‐(Arylamino)styrene Derivatives.
Authors: Kobayashi Kazuhiro , Miyamoto Kazuna , Yamase Tohru , Nakamura Daizo , Morikawa Osamu , Konishi Hisatoshi 
Published: January 2007

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, please click on HTML or PDF.
Rhodium‐Catalyzed Multicomponent‐Coupling Reactions Involving a Carborhodation—Cross‐Coupling Sequence.
Authors: Shintani Ryo , Yamagami Takafumi , Hayashi Tamio 
Published: January 2007

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, please click on HTML or PDF.
Stereoselective Preparation of 1,2,4‐Oxadiazole Derivatives Substituted by Pentafluorophenyl by 1,3‐Dipolar Cycloaddition Reaction.
Authors: Jiang Huiling , Zhao Jingwei , Han Xiaobing , Zhu Shizheng 
Published: January 2007

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, please click on HTML or PDF.
An Easy and Straightforward Oxidative Rearrangement of 1,2‐Dialkoxy‐Substituted Olefins.
Authors: Fananas Francisco J. , Alonso Jorge , Rodriguez Felix , Borge Javier 
Published: January 2007

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, please click on HTML or PDF.
Silica‐Gel‐Supported Aluminum Chloride: A Stable, Efficient, Selective, and Reusable Catalyst for Tetrahydropyranylation of Alcohols and Phenols.
Authors: Borujeni Kaveh Parvanak 
Published: January 2007

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, please click on HTML or PDF.
Rapid Synthesis of 4‐Benzyl‐4‐aminopiperidines by Addition of Grignard Reagents to N‐(1‐Boc‐Piperidine‐4‐ylidene)‐tert‐butanesulfinyl Imine.
Authors: Caldwell John J. , Collins Ian 
Published: January 2007

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, please click on HTML or PDF.
Synthesis of δ‐Thiolactams by the Aza‐Diels—Alder Reaction of in situ Generated Allenyltrimethylsilylthioketenes with Imines.
Authors: Aoyagi Shigenobu , Hakoishi Michiko , Suzuki Mariko , Nakanoya Yusuke , Shimada Kazuaki , Takikawa Yuji 
Published: January 2007

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, please click on HTML or PDF.
Practical Synthesis of New Chiral cis‐Phthalazinones with Potential for High Phosphodiesterase (PDE4) Inhibitory Activity.
Authors: Dang Tinh Van , Jin Chung Keun , Miyamoto Motoyuki , Ikee Yoshifumi , Masuda Takashi , Sano Shigeki , Shiro Motoo , Nagao Yoshimitsu 
Published: January 2007

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, please click on HTML or PDF.
Metal Triflimide as a Lewis Acid Catalyst for Biginelli Reactions in Water.
Authors: Suzuki Ichiro , Suzumura Yuko , Takeda Kei 
Published: January 2007

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, please click on HTML or PDF.
One‐Pot, Three‐Component Synthesis of 2,3‐Dihydro‐4(1H)‐quinazolinones by Montmorillonite K‐10 as an Efficient and Reusable Catalyst.
Authors: Salehi Peyman , Dabiri Minoo , Baghbanzadeh Mostafa , Bahramnejad Mahboobeh 
Published: January 2007

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, please click on HTML or PDF.
An Efficient Synthesis of Cyclic Urethanes from Boc‐Protected Amino Acids Through a Metal Triflate‐Catalyzed Intramolecular Diazocarbonyl Insertion Reaction.
Authors: Jung Jae‐Chul , Avery Mitchell A. 
Published: January 2007

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, please click on HTML or PDF.
Synthetic Studies on the MARDi Cascade: Stereoselective Synthesis of Heterocyclic Seven‐Membered Rings.
Authors: Coquerel Yoann , Bensa David , Doutheau Alain , Rodriguez Jean 
Published: January 2007

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, please click on HTML or PDF.
Synthesis of Hexylselenol and Hexylselenides from Hexylthiol Involving Hexylthiolanium Salts.
Authors: Krief Alain , Dumont Willy , Robert Michael 
Published: January 2007

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, please click on HTML or PDF.
Enantioselective Syntheses of Tremulenediol A (I) and Tremulenolide A (II).
Authors: Ashfeld Brandon L. , Martin Stephen F. 
Published: January 2007

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, please click on HTML or PDF.
A Modified U‐4CR Reaction with 2‐Nitrobenzylamine as an Ammonia Equivalent.
Authors: Sung Kuangsen , Chen Fu‐Lin , Huang Pei‐Chun 
Published: January 2007

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, please click on HTML or PDF.
First Synthesis of Argadin: A Nanomolar Inhibitor of Family‐18 Chitinases
Authors: Dixon Mark J. , Andersen Ole A. , van Aalten Daan M. F. , Eggleston Ian M. 
Published: January 2007

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, please click on HTML or PDF.
A New One‐Pot Synthesis of Gb3 and isoGb3 Trisaccharide Analogues.
Authors: Wang Changning , Li Qin , Wang Haisheng , Zhang Li‐He , Ye Xin‐Shan 
Published: January 2007

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, please click on HTML or PDF.
Desymmetrization of Substituted 1,3‐Diketones: A Formal Synthesis of (+)‐Stemoamide.
Authors: Bogliotti Nicolas , Dalko Peter I. , Cossy Janine 
Published: January 2007

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, please click on HTML or PDF.
Synthesis of 2‐Substituted 8‐Azabicyclo[3.2.1]octan‐3‐ones in Aqueous NaOH Solution of Low Concentration.
Authors: Jung Dai‐il , Song Ju‐hyun , Lee Do‐hun , Kim Yong‐hwan , Lee Yong‐gyun , Hahn Jung‐tai 
Published: January 2007

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, please click on HTML or PDF.
In vitro Inhibitory Activity of Boropinic Acid Against Helicobacter pylori.
Authors: Epifano Francesco , Menghini Luigi , Pagiotti Rita , Angelini Paola , Genovese Salvatore , Curini Massimo 
Published: January 2007

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, please click on HTML or PDF.
Heteroaryl‐substituted Semicarbazones: Synthesis and Anticonvulsant Activity of N‐(3‐Methylpyridin‐2‐yl)‐substituted Semicarbazones.
Authors: Mehta Shalini , Pavana Roheeth Kumar , Yogeeswari Perumal , Sriram Dharmarajan , Stables James 
Published: January 2007

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, please click on HTML or PDF.
A New Class of Compounds with Unusual Magnetic Behavior: Quasi‐One‐Dimensional Complex Oxides of the A3n+3mAn′B3m+nO9m+6n Family
Authors: Bazuev G. V. 
Published: January 2007

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, please click on HTML or PDF.
Roads to New Guanidine Chemistry from 2‐Imidazolidinones Through 2‐Chloroamidinium Derivatives
Authors: Ishikawa Tsutomu 
Published: January 2007

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, please click on HTML or PDF.
Bidentate Ligands by Supramolecular Chemistry — The Future for Catalysis?
Authors: Sandee Albertus J. , Reek Joost N. H. 
Published: January 2007

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, please click on HTML or PDF.
Enzymatic Aminolysis and Ammonolysis Processes in the Preparation of Chiral Nitrogenated Compounds
Authors: Gotor‐Fernandez Vicente , Gotor Vicente 
Published: January 2007

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, please click on HTML or PDF.
Biological Activity of Asp‐hemolysin as a Regulation Factor to Atherogenic Effect by Oxidized Low‐Density Lipoprotein
Authors: Kumagai Takeshi 
Published: January 2007

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, please click on HTML or PDF.
Bestimmung des Kontakt‐Wärmeübergangskoeffizienten aus transienten Temperaturmessungen
Authors: Fieberg C. , Kneer R. 
Published: January 2007

AbstractDer thermische Kontaktwiderstand zwischen zwei angrenzenden Bauteilen ist in vielen technischen Anwendungen von großer Relevanz. Bisherige Untersuchungen des kontaktdruckabhängigen Wärmeübergangs beschränken sich auf niedrige Lasten im Bereich einiger Megapascal. Um die Berechnungssicherheit bei der Auslegung thermisch und mechanisch belasteter Bauteilverbindungen zu verbessern, sind genauere Kenntnisse zur Druckabhängigkeit des Kontaktwiderstandes notwendig.
Experimentelle Untersuchungen sowie 2D‐ und 3D‐Simulationen zum Stofftransport an Einzeltropfen mit Marangoni‐Konvektion
Authors: Wegener M. , Paschedag A. R. , Kraume M. 
Published: January 2007

AbstractDie Überlagerung vieler, zum Teil gegensätzlicher Effekte am gesamten Stofftransport in technischen Apparaten macht es bisher unmöglich, den Anteil der Marangoni‐Konvektion am Stofftransport zu quantifizieren. In dieser Arbeit werden sowohl experimentelle als auch numerische Untersuchungen zum Stofftransport vorgestellt. Experimentell wird in einer Einzeltropfenkolonne der Frage nachgegangen, welchen Einfluss die Anfangskonzentration der Übergangskomponente auf die Stofftransportgeschwindigkeit hat. Die ermittelten Ergebnisse werden mit numerischen Simulationen verglichen.
Charakterisierung von autokatalytischen Zersetzungsreaktionen anhand von Messungen mit einem dynamischen Differenzkalorimeter
Authors: Fischer S. , Krahn G. , Reimer B. 
Published: January 2007

AbstractVon Zersetzungsreaktionen, die nach einem autokatalytischen Reaktionstyp ablaufen, geht ein großes Gefahrenpotenzial aus. Die Induktionsphase von autokatalytischen Zersetzungsreaktionen ist schwer zu erkennen, weil kein oder nur ein geringer Temperaturanstieg zu beobachten ist. Dies stellt ein sicherheitstechnisches Problem dar, da die anlaufende Zersetzungsreaktion über den Temperaturanstieg nicht erfasst werden kann. Um den Zersetzungsverlauf beschreiben zu können, ist das Wissen um den Reaktionstyp notwendig. Das Ziel der durchgeführten Arbeiten besteht darin, durch mikrokalorische Untersuchungsmethoden Unterscheidungsmerkmale zwischen autokatalytischen Zersetzungsmechanismen und solchen n. Ordnung herauszuarbeiten.
Herausforderung Zukunft – Technischer Fortschritt und Globalisierung
Authors: Jischa M. F. 
Published: January 2007

Abstract„Verantwortungsvoller Umgang mit Ressourcen”︁: So lautete der Titel der GVC/DECHEMA‐Jahrestagungen 2006. Im Folgenden soll das Thema in einen größeren Rahmen gestellt werden, bezeichnet als Herausforderung Zukunft. So lautet der Titel meines gleichnamigen Buches mit dem Untertitel Technischer Fortschritt und Globalisierung [1], dem die hier gezeigten Bilder und Tabellen entnommen sind. Interessant ist zunächst die Frage, warum und seit wann wir darüber nachdenken.
In Situ SAXS/WAXS of Zeolite Microwave Synthesis: NaY, NaA, and Beta Zeolites
Authors: Panzarella Bernard , Tompsett Geoffrey , Conner William C. , Jones Keith 
Published: January 2007

AbstractA custom waveguide apparatus is constructed to study the microwave synthesis of zeolites by in situ small‐angle X‐ray scattering (SAXS) and wide‐angle X‐ray scattering (WAXS). The WR‐284 waveguide is used to heat precursor solutions using microwaves at a frequency of 2.45 GHz. The reaction vessels are designed to include sections of thin‐walled glass, which permit X‐rays to pass through the precursor solutions with minimal attenuation. Slots were machined into the waveguide to provide windows for X‐ray energy to enter and scatter from solutions during microwave heating. The synthesis of zeolites with conventional heating is also studied using X‐ray scattering in the same reactor. SAXS studies show that the crystallization of beta zeolite and NaY zeolite is preceded by a reorganization of nanosized particles in their precursor solutions or gels. The evolution of these particles during the nucleation and crystallization stages of zeolite formation depends on the properties of the precursor solution. The synthesis of NaA and NaX zeolites and sodalite from a single zeolite precursor is studied by microwave and conventional heating. Microwave heating shifts the selectivity of this synthesis in favor of NaA and NaX over sodalite; conventional heating leads to the formation of sodalite for synthesis from the same precursor. The use of microwave heating also led to a more rapid onset of NaA zeolite product crystallization compared to conventional heating. Pulsed and continuous microwave heating are compared for zeolite synthesis. The resulting rates of formation of the zeolite products, and the relative amounts of the products determined from the WAXS spectra, are similar when either pulsed or continuous microwave heating is applied in the reactor while maintaining the same synthesis temperature. The consequences of these results in terms of zeolite synthesis are discussed.
Circadian changes in Drosophila motor terminals
Authors: Mehnert Kerstin I. , Beramendi Ana , Elghazali Fahad , Negro Paolo , Kyriacou Charalambos P. , Cantera Rafael 
Published: January 2007

AbstractIn Drosophila melanogaster, as in most other higher organisms, a circadian clock controls the rhythmic distribution of rest/sleep and locomotor activity. Here we report that the morphology of Drosophila flight neuromuscular terminals changes between day and night, with a rhythm in synaptic bouton size that continues in constant darkness, but is abolished during aging. Furthermore, arrhythmic mutations in the clock genes timeless and period also disrupt this circadian rhythm. Finally, these clock mutants also have an opposing effect on the nonrhythmic phenotype of neuronal branching, with tim mutants showing a dramatic hyperbranching morphology and per mutants having fewer branches than wild‐type flies. These unexpected results reveal further circadian as well as nonclock related pleiotropic effects for these classic behavioral mutants. © 2007 Wiley Periodicals, Inc. Develop Neurobiol, 2007.
A switch in numb isoforms is a critical step in cortical development
Authors: Bani‐Yaghoub Mahmud , Kubu Chris J. , Cowling Rebecca , Rochira Jennifer , Nikopoulos George N. , Bellum Stephen , Verdi Joseph M. 
Published: January 2007

AbstractLoss of numb function suggests that numb maintains progenitors in an undifferentiated state. Herein, we demonstrate that numb1 and numb3 are expressed in undifferentiated cortical progenitors, whereas numb2 and numb4 become prominent throughout differentiation. To further assess the role of different numb isoforms in cortical neural development, we first created a Numb‐null state with antisense morpholino, followed by the re‐expression of specific numb isoforms. The re‐expression of numb1 or numb3 resulted in a significant reduction of neural differentiation, correlating with an expansion of the cortical progenitor pool. In contrast, the expression of numb2 or numb4 resulted in a reduction of proliferating progenitors and a corresponding increase in mammalian achete‐scute homologue (MASH1) expression, concurrent with the appearance of the mitogen‐activated protein‐2–positive neurons. Of interest, the effect of numb isoforms on neural differentiation could not be directly related to Notch, because classic canonical Notch signaling assays failed to uncover any differences in the four isoforms to inhibit the Notch downstream events. This finding suggests that numb may have other signaling properties during neuronal differentiation in addition to augmenting notch signal strength. Developmental Dynamics 236:696–705, 2007. © 2007 Wiley‐Liss, Inc.