bluuebunny/crossref_metadata_2025 huggingface dataset:
An Efficient Intramolecular Stetter Reaction in Room Temperature Ionic Liquids Promoted by Microwave Irradiation.
Authors: Zhou Zhong‐Zhen , Ji Feng‐Qing , Cao Min , Yang Guang‐Fu
Published: January 2007

ChemInform 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.
The Implication of Electrocatalysis in MCR Strategy: Electrocatalytic Multicomponent Transformation of Cyclic 1,3‐Diketones, Aldehydes and Malononitrile into Substituted 5,6,7,8‐Tetrahydro‐4H‐chromenes.
Authors: Elinson Michail N. , Dorofeev Alexander S. , Feducovich Sergey K. , Gorbunov Sergey V. , Nasybullin Ruslan F. , Miloserdov Fedor M. , Nikishin Gennady I.
Published: January 2007

ChemInform 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.
Reactions of 4‐Chloro‐3‐formyl‐coumarin with Primary Amines.
Authors: Strakova I. , Petrova M. , Belyakov S. , Strakovs A.
Published: January 2007

ChemInform 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.
Asymmetric Synthesis of Chromanones via N‐Heterocyclic Carbene Catalyzed Intramolecular Crossed‐Benzoin Reactions.
Authors: Enders Dieter , Niemeier Oliver , Raabe Gerhard
Published: January 2007

ChemInform 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.
Halide Ions as a Highly Efficient Promoter in the Ru‐Catalyzed Hydroesterification of Alkenes and Alkynes.
Authors: Park Eun Ju , Lee Ji Min , Han Hoon , Chang Sukbok
Published: January 2007

ChemInform 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.
Asymmetric Hydrogenation of Pyridines: Enantioselective Synthesis of Nipecotic Acid Derivatives.
Authors: Lei Aiwen , Chen Mao , He Minsheng , Zhang Xumu
Published: January 2007

ChemInform 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 Functionalized Quinolines via Ugi and Pd‐Catalyzed Intramolecular Arylation Reactions.
Authors: Ma Zhibo , Xiang Zheng , Luo Tuoping , Lu Kui , Xu Zhibin , Chen Jiahua , Yang Zhen
Published: January 2007

ChemInform 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.
Expanding the Scope of Mn(OAc)3‐Mediated Cyclizations: Synthesis of the Tetracyclic Core of Tronocarpine.
Authors: Magolan Jakob , Kerr Michael A.
Published: January 2007

ChemInform 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.
Domino Reaction of Acyclic α,α‐Dialkenoylketene S,S‐Acetals and Diamines: Efficient Synthesis of Tetracyclic Thieno[2,3‐b]thiopyran‐Fused Imidazo[1,2‐a]pyridine/Pyrido[1,2‐a]pyrimidines.
Authors: Liang Fushun , Zhang Jiqing , Tan Jing , Liu Qun
Published: January 2007

ChemInform 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 Synthesis of a New Pipecolic Acid Analogue (I) with a Bicyclic Structure.
Authors: Casabona Diego , Cativiela Carlos
Published: January 2007

ChemInform 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.
Spirocyclization in a Three‐Component Reaction of Trifluoromethanesulfonamide with Paraformaldehyde and Malonamide
Authors: Meshcheryakov V. I. , Shainyan B. A. , Zavodnik V. E. , Bel'skii V. K.
Published: January 2007

ChemInform 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.
Iron(III) Chloride Catalyzed Three‐Component Grieco Condensation: Synthesis of Tetrahydropyrido[2′,3′:3,4]pyrazolo[1,5‐a]pyrimidines/quinazolines.
Authors: Kanth S. Ravi , Reddy G. Venkat , Maitraie D. , Narsaiah B. , Rao P. Shanthan , Kumar K. Ravi , Sridhar B.
Published: January 2007

ChemInform 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.
Mechanistic Insight into Copper‐Catalyzed Allylic Substitutions with Bis(triorganosilyl) Zincs. Enantiospecific Preparation of α‐Chiral Silanes.
Authors: Schmidtmann Eric S. , Oestreich Martin
Published: January 2007

ChemInform 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.
Reactivity Studies of 3,3‐Bis(trimethylsilyl)‐2‐methyl‐1‐propene in Lewis Acid Catalyzed Allylation Reactions.
Authors: Williams David R. , Morales‐Ramos Angel I. , Williams Catherine M.
Published: January 2007

ChemInform 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.
Phosphine‐Catalyzed α‐P‐Addition on Activated Alkynes: A New Route to P—C—P Backbones.
Authors: Lecercle Delphine , Sawicki Marcin , Taran Frederic
Published: January 2007

ChemInform 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.
Degraded and Oxetane‐Bearing Limonoids from the Roots of Melia azedarach.
Authors: Fukuyama Yoshiyasu , Nakaoka Momoko , Yamamoto Tomoko , Takahashi Hironobu , Minami Hiroyuki
Published: January 2007

ChemInform 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.
Trypanocidal Constituents in Plants. Part 6. Minor Withanolides from the Aerial Parts of Physalis angulata
Authors: Abe Fumiko , Nagafuji Shinja , Okawa Masafumi , Kinjo Junei
Published: January 2007

ChemInform 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.
Rhodiolosides A—E, Monoterpene Glycosides from Rhodiola rosea
Authors: Koike Kazuo , et al. et al.
Published: January 2007

ChemInform 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.
Three New Cyclolanostane Triterpenoids from the Ethanol Extract of the Stems of Kadsura heteroclita.
Authors: Wang Wei , Liu Jin‐Zhi , Ma Xiao‐Chi , Yang Min , Wang Wei‐Xing , Xu Zheng‐Ren , Liu Peng , Guo De‐An
Published: January 2007

ChemInform 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.
Structure Revision of HM‐3, an Aromatic Sesquiterpene Isolated from the Phytopathogenic Fungus Helicobasidium mompa. First Total Syntheses of HM‐3 and HM‐4.
Authors: Srikrishna A. , Ravikumar P. C.
Published: January 2007

ChemInform 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 7,8‐Dihydro Analogues by Reaction of 20‐Hydroxyecdysone Derivatives with Lithium Aluminum Hydride.
Authors: Afon'kina S. R. , Shafikov R. V. , Savchenko R. G. , Galyautdinov I. V. , Odinokov V. N.
Published: January 2007

ChemInform 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.
Itampolins A and B, New Brominated Tyrosine Derivatives from the Sponge Iotrochota purpurea.
Authors: Sorek Hagit , Rudi Amira , Aknin Maurice , Gaydou Emile , Kashman Yoel
Published: January 2007

ChemInform 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 (S)‐Gizzerosine (I), a Potent Inducer of Gizzard Erosion in Chicks.
Authors: Shimasaki Yasuharu , Kiyota Hiromasa , Sato Minoru , Kuwahara Shigefumi
Published: January 2007

ChemInform 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 Cyclic Peptides Constrained with Biarylamine Linkers Using Buchwald—Hartwig C—N Coupling.
Authors: Balraju V. , Iqbal Javed
Published: January 2007

ChemInform 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.
REPLACE: A Strategy for Iterative Design of Cyclin‐Binding Groove Inhibitors.
Authors: Andrews Martin J. I. , Kontopidis George , McInnes Campbell , Plater Andy , Innes Lorraine , Cowan Angela , Jewsbury Philip , Fischer Peter M.
Published: January 2007

ChemInform 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 Synthesis of D‐Glucosaminic Acid from D‐Glucosamine on Active Charcoal‐Supported Pd—Bi Catalysts.
Authors: Gu Wen‐xiu , Xia Wen‐shui
Published: January 2007

ChemInform 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.
Two Efficient Syntheses of Protected 4‐Deoxy‐D‐lyxohexose (4‐Desoxy‐D‐mannose).
Authors: Krohn Karsten , Shuklov Ivan
Published: January 2007

ChemInform 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 of N‐Demethylossamine and Elaboration of Its Glycosylation.
Authors: Kutsumura Noriki , Nishiyama Shigeru
Published: January 2007

ChemInform 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 Synthesis of Some Unsaturated (1,2,3)‐Triazole‐Linked Glycoconjugates.
Authors: de Oliveira Ronaldo N. , Sinou Denis , Srivastava Rajendra M.
Published: January 2007

ChemInform 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 Epoxidation of 4‐Deoxypentenosides: A Polarized‐π Model.
Authors: Cheng Gang , Boulineau Fabien P. , Liew Siong‐Tern , Shi Qicun , Wenthold Paul G. , Wei Alexander
Published: January 2007

ChemInform 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.
Preparation and Use of Microarrays Containing Synthetic Heparin Oligosaccharides for the Rapid Analysis of Heparin—Protein Interactions.
Authors: Noti Christian , de Paz Jose L. , Polito Laura , Seeberger Peter H.
Published: January 2007

ChemInform 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 General Approach to Crinine‐Type Amaryllidaceae Alkaloids: Total Syntheses of (.+‐.)‐Haemanthidine, (.+‐.)‐Pretazettine, (.+‐.)‐Tazettine, and (.+‐.)‐Crinamine.
Authors: Zhang Fu‐Min , Tu Yong‐Qiang , Liu Jian‐Dong , Fan Xiao‐Hui , Shi Lei , Hu Xiang‐Dong , Wang Shao‐Hua , Zhang Yong‐Qiang
Published: January 2007

ChemInform 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.
The First Total Synthesis of (.+‐.)‐Annosqualine by Means of Oxidative Enamide—Phenol Coupling: Pronounced Effect of Phenoxide Formation on the Phenol Oxidation Mechanism.
Authors: Shigehisa Hiroki , Takayama Jun , Honda Toshio
Published: January 2007

ChemInform 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.
Agesamides A and B, Bromopyrrole Alkaloids from Sponge Agelas Species: Application of DOSY for Chemical Screening of New Metabolites.
Authors: Tsuda Masashi , Yasuda Tetsuro , Fukushi Eri , Kawabata Jun , Sekiguchi Mitsuhiro , Fromont Jane , Kobayashi Jun'ichi
Published: January 2007

ChemInform 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‐Deoxy‐2‐fluoro‐2‐C‐methyl‐D‐ribofuranoses.
Authors: Clark Jeremy L. , Mason J. Christian , Hobbs Ann J. , Hollecker Laurent , Schinazi Raymond F.
Published: January 2007

ChemInform 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.
Pd—Xantphos‐Catalyzed Direct Arylation of Nucleosides.
Authors: Ngassa Felix N. , DeKorver Kyle A. , Melistas Theothora S. , Yeh Edmund A.‐H. , Lakshman Mahesh K.
Published: January 2007

ChemInform 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.
Two Prenylated Flavones from the Tree Bark of Artocarpus lanceifolius.
Authors: Syah Yana M. , Achmad Sjamsul A. , Aimi Norio , Hakim Euis H. , Juliawaty Lia D. , Takayama Hiromitsu
Published: January 2007

ChemInform 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.
Syntheses of 7‐Fluoro‐ and 6,7‐Difluoroserotonin (V) and 7‐Fluoro‐ and 6,7‐Difluoromelatonin (VII).
Authors: Heredia‐Moya Jorge , Hayakawa Yoshio , Kirk Kenneth L.
Published: January 2007

ChemInform 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 Concise Synthesis of (‐)‐Cytoxazone and (‐)‐4‐epi‐Cytoxazone Using Chlorosulfonyl Isocyanate.
Authors: Kim In Su , Kim Ji Duck , Ryu Chae Baek , Zee Ok Pyo , Jung Young Hoon
Published: January 2007

ChemInform 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 Dioxomorpholine Derivatives, Javanicunine A and B, from Eupenicillium javanicum.
Authors: Nakadate Shou , Nozawa Koohei , Horie Hitoshi , Fujii Yuichi , Nagai Masahiro , Komai Shin‐ichirou , Hosoe Tomoo , Kawai Ken‐ichi , Yaguchi Takashi , Fukushima Kazutaka
Published: January 2007

ChemInform 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.
Diversity‐Oriented Synthesis of Pochonins and Biological Evaluation Against a Panel of Kinases.
Authors: Moulin Emilie , Barluenga Sofia , Totzke Frank , Winssinger Nicolas
Published: January 2007

ChemInform 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.
Cytotoxic Arylnaphthalene Lignans from Phyllanthus oligospermus
Authors: Wu Shwu‐Jen , Wu Tian‐Shung
Published: January 2007

ChemInform 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 (R)‐Telomestatin.
Authors: Doi Takayuki , Yoshida Masahito , Shin‐ya Kazuo , Takahashi Takashi
Published: January 2007

ChemInform 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.
Dibromomethane as One‐Carbon Source in Organic Synthesis: Total Synthesis of (.+‐.)‐Canadensolide (I).
Authors: Hon Yung‐Son , Hsieh Cheng‐Han
Published: January 2007

ChemInform 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.
Identification of Labile UDP‐Ketosugars in Helicobacter pylori, Campylobacter jejuni and Pseudomonas aeruginosa: Key Metabolites Used to Make Glycan Virulence Factors.
Authors: McNally David J. , Schoenhofen Ian C. , Mulrooney Erin F. , Whitfield Dennis M. , Vinogradov Evgeny , Lam Joseph S. , Logan Susan M. , Brisson Jean‐Robert
Published: January 2007

ChemInform 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.
Magnetoresistance of Co(Pt)‐ITO Nanocomposite Films
Authors: Shi Ji , Ekawati Wanti , Nakamura Yoshio
Published: January 2007

ChemInform 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.
Heavy Metal Removal from Contaminated Sludge for Land Application: A Review
Authors: Babel Sandhya , Dacera Dominica del Mundo
Published: January 2007

ChemInform 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 Fe(VI) Nitride: There Is Plenty of Room at the Top
Authors: Chirik Paul J.
Published: January 2007

ChemInform 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.
Single Metal Ion Based Molecular Building Blocks (MBBs): Approach to the Design and Synthesis of Metal‐Organic Assemblies
Authors: Brant Jacilynn A. , Liu Yunling , Sava Dorina F. , Beauchamp Derek , Eddaoudi Mohamed
Published: January 2007

ChemInform 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, Structural and Spectroscopic Studies of Heteronuclear (Oxo)alkoxides as Precursors for Mixed Metal Oxides
Authors: Nunes Giovana G. , Reis Dayane M. , Camargo Pedro H. C. , Hitchcock Peter B. , Sa Eduardo L. , Evans David J. , da Cunha Carlos J. , Tremiliosi‐Filho Germano , Zarbin Aldo J. G. , Soares Jaisa F.
Published: January 2007

ChemInform 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.
Deuterium‐Labelling in Mechanistic Studies on Heterogeneous Acid—Base Catalysts
Authors: Sommer J. , Walspurger S.
Published: January 2007

ChemInform 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.
Factors Influencing Ring Closure Through Olefin Metathesis
Authors: Ghosh Subrata , Ghosh Sarita , Sarkar Niladri
Published: January 2007

ChemInform 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 Computational and Conceptual DFT Approach to the Kinetics of Acid Zeolite Catalyzed Electrophilic Aromatic Substitution Reactions
Authors: Geerlings P. , Vos A. M. , Schoonheydt R. A.
Published: January 2007

ChemInform 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.
Studies of Neutral Rare‐Gas Compounds and Their Non‐Covalent Interactions with Other Molecules
Authors: McDowell Sean A. C.
Published: January 2007

ChemInform 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.
Domino Heck—Pericyclic Reactions
Authors: von Zezschwitz Paultheo , de Meijere Armin
Published: January 2007

ChemInform 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.
Alkyne Metathesis Catalysts: Scope and Future
Authors: Mortreux Andre , Coutelier Olivier
Published: January 2007

ChemInform 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.
The Chemistry of Thiohydrazonates and Their Utility in Organic Synthesis
Authors: Shawali Ahmad Sami , Mosselhi Mosselhi A. N.
Published: January 2007

ChemInform 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, Chemistry and Applications of α‐Aminophosphonic and α‐Aminophosphonous Acids Derivatives Bearing a Furan Moiety
Authors: Lewkowski Jaroslaw
Published: January 2007

ChemInform 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.
Utility of Cyanoacetic Acid Hydrazide in Heterocyclic Synthesis
Authors: Bondock Samir , Tarhoni Abd El‐Gaber , Fadda Ahmed A.
Published: January 2007

ChemInform 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.
Solid‐Phase Indole Synthesis
Authors: Ziegert Robert E. , Knepper Kerstin , Braese Stefan
Published: January 2007

ChemInform 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 Expansion and Ring Opening of Azetidines
Authors: Couty Francois , Durrat Francois , Evano Gwilherm
Published: January 2007

ChemInform 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.
Biotransformations in the Synthesis of 2‐Pyrrolidinones and 2‐Pyrrolinones
Authors: Felluga Fulvia , Gombac Valentina , Pitacco Giuliana , Valentin Ennio
Published: January 2007

ChemInform 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.
Does Phenothiazine Give a Dianion on Addition of 2 Equivalents of Strong Base?
Authors: Mortier Jacques , Nguyen Thi‐Huu , Tilly David , Castanet Anne‐Sophie
Published: January 2007

ChemInform 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 Oxidations Mediated by Metal Ions and Nitroxyl Radicals
Authors: Sheldon Roger A. , Arends Isabel W. C. E.
Published: January 2007

ChemInform 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.
Iridium‐Catalyzed Formation of Carbon—Carbon and Carbon—Heteroatom Bonds
Authors: Takeuchi Ryo , Kezuka Satoko
Published: January 2007

ChemInform 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.
The Structure of the Products Resulting from Dehydroacetic Acid and Hydrazines
Authors: Kumar Devinder , Singh Shiv P.
Published: January 2007

ChemInform 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.
Direct Asymmetric Aldol—Tishchenko Reaction.
Authors: Mlynarski Jacek
Published: January 2007

ChemInform 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.
Homolytic Substitution at the Sulfur Atom as a Tool for Organic Synthesis
Authors: Crich David
Published: January 2007

ChemInform 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.
Super Radical Stabilizers
Authors: Creary Xavier
Published: January 2007

ChemInform 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 and Structure—Activity Relationship of a Cytotoxic Polycyclic Ether Gymnocin‐A
Authors: Tsukano Chichiro , Sasaki Makoto
Published: January 2007

ChemInform 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 Allelopathic Terpenoids
Authors: Takikawa Hirosato
Published: January 2007

ChemInform 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.
Preparation and the Activity of Novel Silsesquioxane‐Based Catalysts
Authors: Wada Kenji , Mitsudo Takeaki
Published: January 2007

ChemInform 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.
Thermodynamics and Foundations of Mass‐Action Kinetics
Authors: Pekar Miloslav
Published: January 2007

ChemInform 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.
Productivity of Selective Electroenzymatic Reduction and Oxidation Reactions: Theoretical and Practical Considerations
Authors: Ruinatscha Reto , Hoellrigl Volker , Otto Katja , Schmid Andreas
Published: January 2007

ChemInform 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.
Development and Application of Medicinal Plant Tissue Cultures for Production of Drugs and Herbal Medicinals in China
Authors: Zhou Li Gang , Wu Jian Yong
Published: January 2007

ChemInform 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.
Diagnosis and Prognosis of Overt Disseminated Intravascular Coagulation in a General Hospital: Meaning of the ISTH Score System, Fibrin Monomers, and Lipoprotein‐C Reactive Protein Complex Formation
Authors: Cauchie Ph. , Cauchie Ch. , Boudjeltia K. Zouaoui , Carlier E. , Deschepper N. , Govaerts D. , Migaud‐Fressart M. , Woodhams B. , Brohee D.
Published: January 2007

ChemInform 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.
Henri Moissan: Winner of the Nobel Prize for Chemistry 1906
Authors: Tressaud Alain
Published: January 2007

ChemInform 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.
Theoretical Aspects of Spin—Spin Couplings
Authors: Fukui H.
Published: January 2007

ChemInform 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.
Rules of Chemical Promotion
Authors: Brosda S. , Vayenas C. G. , Wei J.
Published: January 2007

ChemInform 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.
Oriented Molecules
Authors: Ramanathan K. V. , Gowda G. A. Nagana , Khetrapal C. L.
Published: January 2007

ChemInform 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.
Multiple Pulse NMR
Authors: Barsukov I.
Published: January 2007

ChemInform 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 Convenient Synthesis of 6,8‐Dimethoxy‐3‐[(2‐(4‐methoxyphenyl)ethyl)isocoumarin
Authors: Ahmad H. Badaruddin , Arfan Muhamma , Rama N. Hasan , Malana M. Aslam , Mahboob Shahid
Published: January 2007

6,8‐Dimethoxy‐3‐[2‐(4‐methoxyphenyl)ethyl]isocoumarin was synthesized by condensation of 5,7‐dimethoxy‐ hompophthalic acid with 3‐(4‐methoxyphenyl)propanoyl chloride. The structure of the synthesized compound was confirmed by its mass spectrometric studies. The synthesized compound serves as a model for synthesis of DL‐agrimonolide.
Pb(NO3)2 Mediated Synthesis of Pyrazine
Authors: Kotharkar Sandeep Anilrao , Shinde Devanand Baburao
Published: January 2007

Lead nitrate was used as an efficient catalyst in the oxidation and condensation reaction of hydroxy ketone with diamine leading to the formation of pyrazine derivatives in excellent yields.
Synthesis and Nonlinear Optical Properties of Chromophores with 1,8‐Dimethoxy‐9,10‐dihydroanthracene and Ring‐locked Triene
Authors: Shi Zheng‐Wei , Li Ying , Lu Guo‐Yuan , Zhang Chao‐Zhi , Liu Fang
Published: January 2007

The new chromophore molecules with nonlinear optical (NLO) properties were prepared by Knoevenagel condensation from 1,8‐dimethoxy‐4,5‐diformyl‐9,10‐dihydroanthracene and isophorone derivative in the presence of piperidine and acetic acid. In these chromophore, the ring‐locked trienes were employed as the conjugation bridge and electron acceptor in D‐π‐A units. The key intermediate dialdehyde was conveniently prepared via a three step reaction, in which 1,8‐dimethoxyanthraquinone was reduced with zinc/acetic acid and sodium/ethanol successively, followed by formylation with 1,1‐dichlorodimethyl ether in the presence of TiCl4. The solvatochromism indicate that they have higher second‐order nonlinear hyperpolarizability μβ values than the corresponding reference compound, without red shift of the charge transfer band.
Highly Efficient Synthesis of Bis(indolyl)methanes Catalyzed by Sodium Tetrafluoroborate
Authors: Kamble Vinod Tribhuvannathji , Bandgar Babasaheb Pandurang , Bavikar Sudhir Narayanrao
Published: January 2007

Sodium tetrafluoroborate (NaBF4) was found to catalyze the electrophilic substitution reactions of indoles with aldehydes and ketones under solvent‐free conditions to afford the corresponding bis(indolyl)methanes in high yields.
Microcalorimetric Evaluation of the Effect of Kanamycin: An Analysis Based on the Median‐Effect Principle
Authors: Wang Li‐Heng , Fan Dai‐Di , Shang Long‐An , Shi Hui‐Juan , Ma Xiao‐Xuan , Mi Yu , Gu Li‐Feng , Xu Kang‐Zhen
Published: January 2007

A study of the effect of drug, kanamycin, on the growth metabolism of recombinant Escherichia coli B1 was carried out by microcalorimeter monitoring of the metabolic activity of treated cells. Power‐time curves of growing recombinant Escherichia coli cell suspensions, treated with different kanamycin doses, were recorded. The extent of the effect was evaluated by changes in the slopes of the microcalorimetric curves and the kinetics of the drug action was interpreted from the time at which these changes reached their maximum values and maintained their maximum values. Experimental dose‐effect relationships conform to the median‐effect principle of the mass‐action law: fa/(1−fa)=(D/D50)m. A plot of y=lg[(fa)1−1]−1 versus x=lg D gives the slope m, D50 and R∞. The experimental results revealed that high concentration of kanamycin had an inhibitory effect on the growth of recombinant Escherichia coli B1 in the lg phase, and had a promoting effect in the stationary period. Moreover, it was demonstrated that microcalorimetry was a reliable method for the detection of modulatory effects in biology.
Volumetric, Ultrasonic and Transport Properties of Binary Liquid Mixtures Containing Dimethyl Formamide at 303.15 K
Authors: Syamala Vardhana , Raja Sekhar Damaramadugu , Siva Kumar Kasibhatta , Venkateswarlu Ponneri
Published: January 2007

Excess volumes (VE), ultrasonic velocities (u), isentropic compressibility (ΔKs) and viscosities (η) for the binary mixtures of dimethyl formamide (DMF) with 1,2‐dichlorobenzene, 1,3‐dichlorobenzene, 1,2,4‐trichlorobenzene, o‐chlorotoluene, m‐chlorotoluene, p‐chlorotoluene, o‐nitrotoluene and m‐nitrotoluene at 303.15 K were studied. Excess volume data exhibit an inversion in sign for the mixtures of dimethyl formamide with 1,2‐ and 1,3‐dichlorobenzenes and the property is completely positive over the entire composition range for the mixtures of dimethyl formamide with 1,2,4‐trichlorobenzene, o‐nitrotoluene and m‐nitrotoluene. On the other hand, the quantity is negative for the mixtures of dimethyl formamide with chlorotoluenes. Isentropic compressibility (Ks) has been computed for the same systems from precise sound velocity and density data. Further, deviation of isentropic compressibility (ΔKs) from ideal behavior was also calculated. ΔKs values are negative over the entire volume fraction range in all the binary mixtures. The experimental sound velocity data were analysed in terms of Free Length Theory (FLT) and Collision Factor Theory (CFT). The viscosity data were analysed on the basis of corresponding state approach. The measured data were discussed on the basis of intermolecular interactions between unlike molecules.
Hydrogen Bonding Interaction of Formic Acid‐, Formaldehyde‐, Formylfluoride‐Nitrosyl Hydride: Theoretical Study on the Geometries, Interaction Energies and Blue‐ or Red‐Shifted Hydrogen Bonds
Authors: Liu Ying , Liu Wen‐Qing , Li Hai‐Yang , Yang Yong , Cheng Shuang
Published: January 2007

The hydrogen bonding interaction of formic acid‐, formaldehyde‐, formylfluoride‐nitrosyl hydride complexes was investigated by the density functional theory (DFT) andab initomethod in conjunction with 6‐311++G(2d,2p) basis set. The geometries, vibrational frequencies and interaction energies of the complexes were calculated by both standard and CP‐corrected methods respectively. Moreover, G3B3 method was employed to estimate the interaction energies. There are C–H···O, N–H···O, N–H···F blue‐shifted H‐bonds and red‐shifted O–H···O H‐bond in the complexes. Electron density redistribution and rehybridization contribute to the N–H and C–H blue shifts. All geometric reorganizations contribute to the N–H blue shifts and partial geometric reorganizations contribute to the C–H blue shifts. The geometric reorganizations of the complex C except (H(5)‐O(4)‐C(1) contribute to the O–H red shift. For the N–H blue shifts, the effect ofr(N–O) variation on the N–H blue shifts is larger than that of (H‐N‐O variation. Rehybridization plays a dominant role in the degree of N–H blue shifts, whereas the electron density redistribution contributes more to the degree of C–H blue shifts than the other effects do.
Preparation and Characterization of a Novel Benzimidazolium Brønsted Acid Ionic Liquid and Its Application in the Synthesis of Arylic Esters
Authors: Wang Yuan‐Yuan , Li Wei , Xu Cheng‐Di , Dai Li‐Yi
Published: January 2007

A novel Brønsted acid task specific ionic liquid 1‐ethylbenzimidazolium tetrafluoroborate ([Hebim]BF4) with functional benzimidazolium cation was synthesized and characterized by 1H NMR, IR, MS spectra and elemental analysis. This novel ionic liquid was successfully used as dual solvent‐catalyst for the synthesis of arylic esters. Higher yields were obtained in the presence of [Hebim]BF4 in comparison with other imidazolium ionic liquids because of the good solubility of the aromatic alcohols and aromatic carboxylic acids in [Hebim]BF4. The product could be separated conveniently from the reaction system, and the ionic liquid could be easily reused after removal of water under vacuum. After 10 times reuse, the selectivity of the ester was still 100%.
Preparation of Medium Cation Exchange Stationary Phase of Polymeric Matrix and Their Chromatographic Properties
Authors: Chen Gang , Gong Bo‐Lin , Bai Quan , Geng Xin‐Du
Published: January 2007

Based on the monodisperse poly(glycidyl methacrylate‐co‐ethylenedimethacrylate) beads (PGMA/EDMA) with macropore as a medium, a new hydrophilic medium cation exchange (MCX) stationary phase for HPLC was synthesized by a new chemically modified method. The stationary phase was evaluated with the property of ion exchange, separability, reproducibility, hydrophilicity, effect of salt concentration, salt types, column loading and pH on the separation and retention of proteins in detail. It was found that it follows ion exchange chromatographic (IEC) retention mechanism. The measured bioactivity recovery for lysozyme was (96±5)%. The dynamic protein loading capacity of the synthesized MCX packings was 21.8 mg/g. Five proteins were almost completely separated within 6.0 min at a flow rate of 4 mL/min using the synthesized MCX resin. The MCX resin was also used for the rapid separation and purification of lysozyme from egg white with only one step. The purity and specific bioactivity of the purified lysozyme was found more than 95% and 70345 U/mg, respectively.
Highly Efficient and Versatile Acetalization of Glycol Catalyzed by Cupric p‐Toluenesulfonate
Authors: Liu Cai‐Hua , Yu Xin‐Yu , Liang Xue‐Zheng , Wang Wen‐Juan , Yang Jian‐Guo , He Ming‐Yuan
Published: January 2007

Acetalization of glycol with carbonyl compounds was carried out catalyzed by cupric p‐toluenesulfonate. These carbonyl compounds included cyclohexanone, propionoaldehyde, n‐butyraldehyde, iso‐butyraldehyde, n‐valeral‐ dehyde, benzaldehyde and butanone. Satisfactory results were obtained:the conversions of these carbonyl compounds were more than 90%, the selectivities were higher than 99.1%, only 0.1% mole ratio of catalyst to substrate and 90 min were sufficient in most cases. The catalyst and products were separated easily by phase separation.
Solvent‐switchable Acetalization by Yb(OTf)3‐Catalyzed Procedures
Authors: Li Gang‐Qin , Shan Wei‐Guang , Su Wei‐Ke , Yao Zhu‐Jun
Published: January 2007

O,O′‐Diethyl acetals were prepared in high yields under mild conditions via the reaction of triethyl orthoformate with aldehydes and ketones in absolute ethanol in the presence of as low as 0.1 mol% of Yb(OTf)3. Using the same catalyst in THF‐H2O, these O,O′‐diethyl acetals could be converted to the corresponding carbonyl compounds efficiently. This new protection‐deprotection protocol presents the advantages of ease of execution, high efficiency and good chemoselectivity.
Synthesis and Fungicidal Activities of Pyrimethanil Heterocyclic Acid Salt
Authors: Sun Xiao‐Hong , Liu Yuan‐Fa , Chen Bang , Jia Ying‐Qi , Yang Jian‐Wu
Published: January 2007

Seven pyrimethanil salts were synthesized by organic base containing nitrogen atom reacting with substituted pyridine acids. They are reported for the first time. Their structures have been confirmed by IR, 1H NMR and elemental analysis. The preliminary toxicity tests indicated that most of them exhibited excellent fungicidal activities. The relationship between the structures and the fungicidal activities of the compounds was discussed.
The Enhancement Effect of Gold Nanoparticles in Drug Delivery and as Biomarkers of Drug‐Resistant Cancer Cells
Authors: Li Jingyuan , Wang Xuemei , Wang Chunxia , Chen Baoan , Dai Yongyuan , Zhang Renyun , Song Min , Lv Gang , Fu Degang
Published: January 2007

The enhancement effect of 3‐mercaptopropionic acid capped gold nanoparticles (NPs) in drug delivery and as biomarkers of drug‐resistant cancer cells has been demonstrated through fluorescence microscopy and electrochemical studies. The results of cell viability experiments and confocal fluorescence microscopy studies illustrate that these functionalized Au NPs could play an important role in efficient drug delivery and biomarking of drug‐resistant leukemia K562/ADM cells. This could be explored as a novel strategy to inhibit multidrug resistance in targeted tumor cells and as a sensitive method for the early diagnosis of certain cancers. Our observations also indicate that the interaction between the functionalized Au NPs and biologically active molecules on the surface of leukemia cells may contribute the observed enhancement in cellular drug uptake.
Enhanced chemotherapy delivery by intraarterial infusion and blood‐brain barrier disruption in the treatment of cerebral metastasis
Authors: Fortin David , Gendron Cathy , Boudrias Marie , Garant Marie‐Pierre
Published: January 2007

BACKGROUND.

Cerebral metastases are clinically significant in 10% to 30% of patients with neoplasia. Multiple cerebral metastases are typically treated with palliative radiotherapy. There is no consensus on the role of enhanced chemotherapy delivery as an adjuvant treatment modality in this disease. In this report, the authors detailed their experience with intraarterial (IA) chemotherapy infusion with and without blood‐brain barrier disruption (BBBD) in patients with multiple cerebral metastases.

METHODS.

From November 1999 to May 2005, 38 patients with multiple cerebral metastases were enrolled in a prospective study. Patients were treated with IA carboplatin, except for those with cerebral metastases of systemic lymphoma, who were administered IA methotrexate. Osmotic BBBD was offered to patients without the presence of a significant mass effect. These regimens were coupled with intravenous etoposide and cyclophosphamide. Cycles were repeated every 4 weeks.

RESULTS.

Survival was calculated from study entry and radiologic response was based on MacDonald criteria. Kaplan‐Meier estimates were generated for all subgroups. Mean and median survival obtained was as follows: 34 and 29.6 months for the whole group; 33.6 and 42.3 months for ovarian carcinoma; 15.3 and 13.5 months for lung adenocarcinomas; 8.3 and 8.8 months for small cell lung carcinoma; 8.9 and 8.1 months for breast carcinoma; and 24.8 and 16.3 months, respectively, for cerebral metastasis from systemic lymphoma.

CONCLUSIONS.

Even with a small number of patients in each subgroup, the results obtained seem promising for multiple brain metastasis of ovarian carcinoma, adenocarcinoma of lung, small cell lung carcinoma, and systemic lymphoma. Cancer 2007;109:751–60. © 2007 American Cancer Society.
Clinical and endoscopic factors predict higher pathologic grades of Barrett dysplasia
Authors: Anandasabapathy Sharmila , Jhamb Jagriti , Davila Marta , Wei Caimiao , Morris Jeffrey , Bresalier Robert
Published: January 2007

BACKGROUND.

Barrett esophagus is highly prevalent in the Western world; however, only a minority of affected individuals progress to esophageal adenocarcinoma. Whereas many studies have examined risk factors for development of Barrett metaplasia, few data are available on risk factors for progression to neoplasia. Identifying simple, reliable, clinical, and endoscopic predictors of high‐grade dysplasia and adenocarcinoma would be helpful for risk stratification in screening and surveillance programs.

METHODS.

Clinical, endoscopic, and histologic data were reviewed for patients with a new Barrett diagnosis between 2002 and 2005. Patients were classified, by an expert gastrointestinal pathologist, as having intestinal metaplasia, indefinite‐for‐dysplasia, low‐grade dysplasia, high‐grade dysplasia, and esophageal adenocarcinoma. Gender, age, race, ethnicity, hiatal hernia presence and size, Barrett segment length, H. pylori status, alcohol, smoking, proton pump inhibitor (PPI) use and duration, and reflux symptom duration were evaluated by logistic regression analysis for their association with dysplasia severity.

RESULTS.

In all, 109 patients (26 women, 83 men, mean age: 58.8) were newly diagnosed with Barrett metaplasia (n = 39), indefinite/low‐grade dysplasia (n = 35), and high‐grade dysplasia/esophageal adenocarcinoma (n = 35) over a 3‐year period. On logistic regression analysis, duration of reflux symptoms for ≥20 years (odds ratio [OR]: 5.66, P = .012), longer Barrett segment length (OR for 3–6 cm vs. <3 cm: 9.05, P < .0001; OR for ≥6 cm: 8.374, P < .0001), hernia size ≥4 cm (OR: 10.63, P = .014), and male gender (OR: 4.03, P = .0019) were associated with higher pathologic grade. Duration of reflux symptoms and Barrett length were significant as both discrete and continuous variables. Absence of H. pylori (OR: 2.731, P = .060) approached significance in predicting dysplasia severity. In bivariate models, gender and Barrett length (continuous form) were significantly associated with grade when considered together (OR: 2.52, P = .0490 and OR: 1.30, P < .0001), as were gender and hernia size >4 cm (OR: 4.64, P = .0049 and OR: 12.18, P = .0197).

CONCLUSIONS.

Male gender, longstanding gastroesophageal reflux disease, hiatal hernia size, and segment length are strongly associated with higher grades of dysplasia at index diagnosis. These factors along with H. pylori status warrant further prospective evaluation as predictors of risk for development of high‐grade dysplasia and esophageal adenocarcinoma. Cancer 2007. © 2007 American Cancer Society.