bluuebunny/crossref_metadata_2025_split huggingface dataset:
A General and Efficient Method for the Preparation of β‐Enamino Ketones and Esters Catalyzed by Indium Tribromide.
Authors: Zhang Zhan‐Hui , Yin Liang , Wang Yong‐Mei 
Published: May 2006

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.
Ring‐Closure Metathesis in Supercritical Carbon Dioxide as Sole Solvent with Use of Covalently Immobilized Ruthenium Catalyst.
Authors: Michalek Florian , Maedge Daniel , Ruehe Juergen , Bannwarth Willi 
Published: May 2006

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.
Bulky Diarylammonium Arenesulfonates as Mild and Extremely Active Dehydrative Ester Condensation Catalysts.
Authors: Sakakura Akira , Nakagawa Shoko , Ishihara Kazuaki 
Published: May 2006

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.
Aqueous Media Deprotection of Ketoximes with Ammonium Persulfate.
Authors: Imanzadeh G. H. , Zamanloo M. R. , Eskandari H. , Banaei A. R. 
Published: May 2006

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 Diazeniumdiolates from the Reactions of Nitric Oxide with Enolates.
Authors: Arulsamy Navamoney , Bohle D. Scott 
Published: May 2006

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.
Catalytic Isomerization of Allylic Alcohols by (η6‐p‐Cymene)‐Ruthenium(II) Complexes in Organic and Aqueous Media: New Recyclable and Highly Efficient Catalysts in Water Containing Ammonium‐Functionalized Ligands.
Authors: Crochet Pascale , Diez Josefina , Fernandez‐Zumel Mariano A. , Gimeno Jose 
Published: May 2006

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 Polymer‐Bound Azabis(oxazoline) Ligands and Their Application in Asymmetric Cyclopropanations.
Authors: Werner Heiko , Herrerias Clara I. , Glos Michael , Gissibl Anja , Fraile Jose M. , Perez Ignacio , Mayoral Jose A. , Reiser Oliver 
Published: May 2006

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.
Electrochemical Synthesis of α‐Hydroxycarboxylic Acids from Acetophenones.
Authors: Lateef S. Khaja , Raju R. Ramesh , Mohan S. Krishna , Reddy S. Jayarama 
Published: May 2006

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.
Palladium Catalyzed Heck Reaction of Arenediazonium Tetrafluoroborate Salts with Baylis—Hillman Adducts: Production of α‐Benzyl‐β‐keto Esters.
Authors: Perez Rolando , Veronese Demetrius , Coelho Fernando , Antunes O. A. C. 
Published: May 2006

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.
Reaction of α,β‐Unsaturated Fischer Carbene Complexes with Allyl Alkoxide.
Authors: Kamikawa Ken , Tachibana Atsushi , Shimizu Yasunori , Uchida Kazuya , Furusyo Masaru , Uemura Motokazu 
Published: May 2006

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.
Suzuki—Miyaura Cross‐Coupling Reactions of Aryl Tellurides with Potassium Aryltrifluoroborate Salts.
Authors: Cella Rodrigo , Cunha Rodrigo L. O. R. , Reis Ana E. S. , Pimenta Daniel C. , Klitzke Clecio F. , Stefani Helio A. 
Published: May 2006

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 Pd/C Catalyzed “Domino” HALEX and Sonogashira Reactions: A Ligand‐ and Cu‐Free Alternative.
Authors: Thathagar Mehul B. , Rothenberg Gadi 
Published: May 2006

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.
Suzuki Coupling of Cyclopropylboronic Acid with Aryl Halides Catalyzed by a Palladium—Tetraphosphine Complex.
Authors: Lemhadri Mhamed , Doucet Henri , Santelli Maurice 
Published: May 2006

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 [6,n] cis‐Fused Ring Compounds via Cr‐Mediated Dearomatization—Ring‐Closing Metathesis.
Authors: Kuendig E. Peter , Bellido Alejandro , Kaliappan Krishna P. , Pape Andrew R. , Radix Sylvie 
Published: May 2006

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.
Kinetic Energy Release of C+70 and Its Endohedral Cation N@C+70: Activation Energy for N Extrusion.
Authors: Cao Baopeng , Peres Tikva , Lifshitz Chava , Cross R. James , Saunders Martin 
Published: May 2006

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.
Novel Chiral Sulfonato‐Salen‐Manganese(III)‐Pillared Hydrotalcite Catalysts for the Asymmetric Epoxidation of Styrenes and Cyclic Alkenes.
Authors: Bhattacharjee Samiran , Anderson James A. 
Published: May 2006

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 Chiral Iminium Salt Catalysts for Asymmetric Epoxidation.
Authors: Bulman Page Philip C. , Buckley Benjamin R. , Rassias Gerasimos A. , Blacker A. John 
Published: May 2006

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.
Cyanuric Chloride: Decent Dehydrating Agent for an Exclusive and Efficient Synthesis of Kinetically Controlled Isomaleimides.
Authors: Haval Kishan P. , Mhaske Santosh B. , Argade Narshinha P. 
Published: May 2006

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 N‐Substituted γ‐Methylene γ‐Lactams.
Authors: Adhikari Raju , Jones Dionne A. , Liepa Andris J. , Nearn Roland H. 
Published: May 2006

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.
Er(OTf)3 as New Efficient Catalyst for the Stereoselective Synthesis of C‐Pseudoglycals.
Authors: Procopio Antonio , Dalpozzo Renato , De Nino Antonio , Nardi Monica , Russo Beatrice , Tagarelli Antonio 
Published: May 2006

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 Selective Transformation of Flavanones to 3‐Bromoflavones and Flavones under Microwave Irradiation.
Authors: Zhou Zhongzhen , Zhao Peiliang , Huang Wei , Yang Guangfu 
Published: May 2006

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.
Enantiospecific Formation of 3,6‐Dihydro‐1H‐pyridin‐2‐ones: Low‐Pressure Palladium‐Catalyzed Decarboxylative Carbonylation of 3‐Tosyl‐5‐vinyloxazolidin‐2‐ones.
Authors: Knight Julian G. , Lawson Iain M. , Johnson Christopher N. 
Published: May 2006

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.
Quantitative Structure—Activity Relationship (QSAR) Studies on Sulfide Analogues as Potent M2 Muscarinic Receptor Antagonists.
Authors: Srivastava A. K. , Khan A. A. , Tripathi Abha , Archana Archana 
Published: May 2006

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 and Efficient Synthesis of Poly‐Substituted Quinolines Assisted by p‐Toluene Sulfonic Acid under Solvent‐Free Conditions: Comparative Study of Microwave Irradiation versus Conventional Heating.
Authors: Jia Cheng‐Sheng , Zhang Ze , Tu Shu‐Jiang , Wang Guan‐Wu 
Published: May 2006

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 Synthetic Approach to Pyrrolo[3,4‐a]indolizines.
Authors: Tereshchenko Alexander D. , Sysoiev Dmitry A. , Tverdokhlebov Anton V. , Tolmachev Andrey A. 
Published: May 2006

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.
Auto‐Redox Reaction: Tin(II) Chloride‐Mediated One‐Step Reductive Cyclization Leading to the Synthesis of Novel Biheterocyclic 5,6‐Dihydro‐quinazolino[4,3‐b]quinazolin‐8‐ones with Three‐Point Diversity.
Authors: Roy Abhijeet , Subramanian Arunachalam , Roy Raja 
Published: May 2006

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 Hydrosilylation of Internal Alkynes with Silane Reagents Bearing Heteroatom Substituents. Studies on the Regio‐ / Stereochemistry and Transformation of the Produced Alkenylsilanes by Rhodium‐Catalyzed Conjugate Addition.
Authors: Sanada Tomoyuki , Kato Tsuyoshi , Mitani Makoto , Mori Atsunori 
Published: May 2006

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.
Molecular Design and Chemical Synthesis of a Highly Potent Epothilone.
Authors: Nicolaou K. C. , Pratt Benjamin A. , Arseniyadis Stellios , Wartmann Markus , O'Brate Aurora , Giannakakou Paraskevi 
Published: May 2006

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.
Total Synthesis of (+)‐1893B Aimed at Establishing Its Stereochemistry.
Authors: Yasui Hiroyuki , Hirai Kunihiro , Yamamoto Shun , Takao Ken‐ichi , Tadano Kin‐ichi 
Published: May 2006

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.
Lanthanoid—Transition Metal Carbonyl Complexes: Architectures Derived from Isocarbonyl Polymeric Arrays
Authors: Liu Shengming , Plecnik Christine E. , Shore Sheldon G. 
Published: May 2006

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(I)‐Catalyzed Asymmetric Addition of Organometallic Reagents to Electron‐Deficient Olefins
Authors: Yoshida Kazuhiro , Hayashi Tamio 
Published: May 2006

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.
Design of Copper‐Based Hybrid Catalysts for CO2 Hydrogenation
Authors: Park Young‐Kwon , Jeon Jong‐Ki , Ihm Son‐Ki 
Published: May 2006

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.
Inclusion Complexation as a Tool in Resolution of Racemates and Separation of Isomers
Authors: Urbanczyk‐Lipkowska Zofia , Toda Fumio 
Published: May 2006

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.
Coulometric Generation of Acids and Bases for Acid—Base Titrations in Non‐Aqueous Solvents
Authors: Mihajlovic R. P. , Jaksic Lj. N. , Dzudovic R. M. 
Published: May 2006

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.
Hypogonadism in male patients with cancer
Authors: Garcia Jose M. , Li Huiling , Mann Douglas , Epner Daniel , Hayes Teresa G. , Marcelli Marco , Cunningham Glenn R. 
Published: May 2006

AbstractBACKGROUNDPatients with cancer often develop anorexia, fatigue, and decreased muscle mass. These signs and symptoms are nonspecific, and they frequently occur in other conditions, including hypogonadism.METHODSThe objectives of this study were 1) to measure testosterone levels in patients with cancer and 2) to examine the correlations between testosterone, tumor necrosis factor‐α (TNF‐α), interleukin‐6 (IL‐6), insulin‐like growth factor‐1 (IGF‐1), ghrelin levels, and appetite in patients with cancer patients and in a noncancer control group. This was designed as a cross‐sectional study in the setting of a university‐affiliated Veterans Affairs Medical Center. The study population included 31 male patients with cancer and 25 gender‐matched noncancer controls of similar age. The variables total testosterone (TT), calculated free testosterone (cFT), calculated bioavailable testosterone (cBT), sex hormone‐binding globulin (SHBG), luteinizing hormone (LH), TNF‐α, IL‐6, IGF‐1, and active ghrelin were measured in fasting morning plasma samples. Appetite was measured according to a visual analog scale. The main outcome measures were cFT and cBT.RESULTSCancer patients had mean TT levels similar to levels in the noncancer control group but significantly lower levels of cFT, cBT, IGF‐1, and appetite. SHBG, LH, TNF‐α, IL‐6, and ghrelin levels were increased in patients with cancer compared with the control group. cFT and cBT levels were correlated inversely with IL‐6 and ghrelin levels and were correlated directly with IGF‐1 levels and appetite.CONCLUSIONSPatients with cancer had lower levels of biologically active testosterone. TT was not adequate for the evaluation of hypogonadism, because SHBG levels were increased. A reliable measurement of FT and/or BT should be used. LH was elevated in the patients with cancer, indicating that low FT levels were caused by primary testicular dysfunction. The authors postulated that high IL‐6 or ghrelin levels inhibit testosterone synthesis, although a secondary effect at the hypothalamic‐pituitary levels cannot be excluded. Cancer 2006. © 2006 American Cancer Society.
T4 category revision enhances the accuracy and significance of stage III breast cancer
Authors: Güth Uwe , Singer Gad , Langer Igor , Schötzau Andreas , Herberich Linda , Holzgreve Wolfgang , Wight Edward 
Published: May 2006

AbstractBACKGROUNDBecause of the considerable heterogeneity in breast carcinoma with noninflammatory skin involvement (T4b/Stage IIIB), a revision was proposed of the TNM staging system that would classify these tumors exclusively based on their tumor size and lymph node status. In the current study, the authors evaluated how implementation of this proposal will affect Stage III noninflammatory breast cancer.METHODSTwo hundred seven patients who were classified with noninflammatory Stage III breast cancer were treated consecutively between 1990 and 1999 at the University Hospital Basel, Switzerland. To assess the extent of T4b/Stage IIIB tumors independent of the clinicopathologic feature of skin involvement, the reclassification was undertaken.RESULTSOf 68 patients who had nonmetastatic T4b breast cancer, 37 patients (54.4%) had a tumor extent in accordance with Stage I/II and had improved disease‐specific survival (DSS) compared with patients who had Stage III breast cancer (P = .008). Excluding those patients from Stage III led to a 17.9% reduction of the number of patients in this group (n = 170 patients). The 10‐year DSS declined from 48.5% to 42.9%.CONCLUSIONSConsiderable numbers of patients who are classified with noninflammatory Stage IIIB breast cancer show only a limited disease extent. Through a revision of the T4 category, these low‐risk patients were excluded from the highest nonmetastatic TNM stage, and overstaging could be avoided. This procedure decreased the degree of heterogeneity of the entire Stage III group and may result in a more precise assessment of this disease entity. Cancer 2006. © 2006 American Cancer Society.
Effects of Polymer Architecture and Composition on the Adhesion of Poly(tetrafluoroethylene)
Authors: Tu Chen‐Yuan , Liu Ying‐Ling , Luo Min‐Tzu , Lee Kueir‐Rarn , Lai Juin‐Yih 
Published: May 2006

AbstractPoly(glycidyl methacrylate), PGMA, chains in linear and arborescent structures were incorporated onto surfaces of poly(tetrafluoroethylene), PTFE, films by hydrogen plasma and ozone treatment and atom transfer radical polymerization. The epoxide groups of the PGMA chains were further reacted with acetic acid (AAc), oxalic acid (XAc), allyl amine (AA), and ethylenediamine (EDN) to introduce hydroxyl and amine groups to the surfaces of the PTFE films. Surface characterizations performed by Fourier Transform infrared attenuated total reflectance (FTIR‐ATR) spectroscopy and X‐ray photoelectron spectroscopy (XPS) confirmed the surface modification and the chemical structure. The PGMA chains in arborescent structures show a high effectiveness for the enhancement of the adhesion of PTFE films. The adhesion of PTFE films was also significantly enhanced by ring‐opening reactions of the PGMA epoxide groups with acetic acid and amine compounds. A high value of 9.5 N cm−1 in the optimum 180° peel strength test was observed with PTFE/copper assemblies.
Molecular and cytogenetic changes involved in the immortalization of nasopharyngeal epithelial cells by telomerase
Authors: Li H.M. , Man C. , Jin Y. , Deng W. , Yip Y.L. , Feng H.C. , Cheung Y.C. , Lo K.W. , Meltzer P.S. , Wu Z.G. , Kwong Y.L. , Yuen A.P.W. , Tsao S.W. 
Published: May 2006

AbstractNasopharyngeal carcinoma (NPC) is a common disease in Hong Kong and southern provinces of China. EBV infection is believed to play a critical role in the development of NPC. Previous studies on the transformation mechanism of EBV genes were mostly performed in either NPC or nonnasopharyngeal epithelial cells which may not be representative of premalignant nasopharyngeal epithelial cells. Establishment of a representative cell system would greatly facilitate the elucidation of the role of EBV infection in the development of NPC. Using telomerase alone, we were able to establish an immortalized nasopharyngeal epithelial cell line from primary nonmalignant nasopharyngeal biopsies. The telomerase‐immortalized nasopharyngeal epithelial cells are largely diploid in karyotype. Interestingly, this newly immortalized nasopharyngeal epithelial cell line, referred as NP460hTert, harbors genetic alterations previously identified in premalignant and malignant nasopharyngeal epithelial cells. These include inactivation of p16 by homozygous deletion of the p16INK4A locus and downregulation of RASSF1A expression. The deletion of the p16INK4A locus appears to be the most crucial event for the immortalization of nasopharyngeal epithelial cells by telomerase and precedes RASSF1A downregulation. In addition, detailed analysis of the cytogenetic changes by conventional cytogenetics, spectral karyotyping (SKY) and array‐based CGH revealed a gain of a 17q21‐q25 fragment on 11p15 chromosome in all NP460hTert cells which occurred before deletion of the p16INK4A locus. Gain of 17q has been previously reported in NPC. In addition, activation of NF‐κB was observed in immortalized NP460hTert cells at the later population doublings, and may play a role in the survival of immortalized NP epithelial cells. Id1 which is commonly expressed in various human cancers, including NPC, was also upregulated in the immortalized NP460hTert cells. Thus, the establishment of an immortalized nasopharyngeal epithelial cell line harboring common genetic alterations present in premalignant and cancerous nasopharyngeal epithelial cells may provide a valuable cell system to examine for early events involved in NPC carcinogenesis, particularly in elucidating the role of EBV infection in NPC development. © 2006 Wiley‐Liss, Inc.
PPARγ‐regulated tight junction development during human urothelial cytodifferentiation
Authors: Varley Claire L. , Garthwaite Mary A.E. , Cross William , Hinley Jennifer , Trejdosiewicz Ludwik K. , Southgate Jennifer 
Published: May 2006

AbstractUrothelial barrier function is maintained by apical membrane plaques and intercellular tight junctions (TJ). Little is known about the composition and regulation of TJ expression in human urothelium. In this study, we have characterised the expression of TJ components in situ and their regulation in an in vitro model of differentiating normal human urothelial (NHU) cells. In normal ureteric urothelium in situ, there was a differentiation‐associated profile of claudins 3, 4, 5, 7, ZO1 and occludin proteins. Proliferating NHU cells in vitro expressed predominantly claudin 1 protein and transcripts for claudins 1–5 and 7. Following induction of differentiation by pharmacological activation of PPARγ and blockade of EGFR, there was de novo expression of claudin 3 mRNA and protein and downregulation of claudin 2 transcription. There was also a massive increase in expression of claudin 4 and 5 proteins which was due to inhibition of proteasomal degradation of claudin 4 and consequential stabilisation of the claudin 5 heterodimerisation partner. NHU cell differentiation was accompanied by relocalisation of TJ proteins to intercellular junctions. The differentiation‐associated development of TJ formation in vitro reflected the stage‐related TJ expression seen in situ. This was distinct from changes in TJ composition of NHU cells mediated by increasing the calcium concentration of the medium. Our results imply a role for PPARγ and EGFR signalling pathways in regulating TJ formation in NHU cells and support the hypothesis that TJ development is an integral part of the urothelial differentiation programme. J. Cell. Physiol. 208: 407–417, 2006. © 2006 Wiley‐Liss, Inc.