bluuebunny/crossref_metadata_2025_split huggingface dataset:
RuII‐SDP‐Complex‐Catalyzed Asymmetric Hydrogenation of Ketones. Effect of the Alkali Metal Cation in the Reaction.
Authors: Xie Jian‐Hua , Liu Sheng , Huo Xiang‐Hong , Cheng Xu , Duan Hai‐Feng , Fan Bao‐Ming , Wang Li‐Xin , Zhou Qi‐Lin 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Recyclable Catalyst for Asymmetric Transfer Hydrogenation with a Formic Acid—Triethylamine Mixture in Ionic Liquid.
Authors: Kawasaki Ikuo , Tsunoda Kazuya , Tsuji Tomoko , Yamaguchi Tomoko , Shibuta Hiroki , Uchida Nozomi , Yamashita Masayuki , Ohta Shunsaku 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Characterization of New Iridium Complexes with the (4S)‐2‐[2‐(Diphenylphosphanyl)phenyl]‐4‐isopropyl‐1,3‐oxazoline Ligand that Catalyze Asymmetric Michael Reactions.
Authors: Carmona Daniel , Ferrer Joaquina , Lorenzo Monica , Lahoz Fernando J. , Dobrinovitch Isabel T. , Oro Luis A. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Microwave‐Assisted Direct Transformation of Amines to Ketones Using Water as an Oxygen Source.
Authors: Miyazawa Akira , Tanaka Kan , Sakakura Toshiyasu , Tashiro Masashi , Tashiro Hideki , Prakash G. K. Surya , Olah George A. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of N,N‐Dialkyl‐N′‐arylhydrazines via Palladium‐Catalyzed N‐Arylation by Using N,N‐Dialkylhydrazines/2LiCl Adducts.
Authors: Cacchi Sandro , Fabrizi Giancarlo , Goggiamani Antonella , Licandro Emanuela , Maiorana Stefano , Perdicchia Dario 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
An Atom Efficient and Solvent‐Free Synthesis of Structurally Diverse Amides Using Microwaves.
Authors: Gelens Edith , Smeets Luc , Sliedregt Leo A. J. M. , van Steen Bart J. , Kruse Chris G. , Leurs Rob , Orru Romano V. A. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Reaction of Allylic and Benzylic Alcohols and Esters with PPh3/I2: One‐Pot Synthesis of β,γ‐Unsaturated Compounds.
Authors: Alvarez‐Manzaneda E. J. , Chahboun R. , Cabrera Torres E. , Alvarez E. , Alvarez‐Manzaneda R. , Haidor A. , Ramos Lopez J. M. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Novel Synthesis of Substituted Cyclopropane Acetic Acid Ethyl Esters from Cyclopropyl Alkyl Ketones.
Authors: Nongkhlaw Rishan Lang , Nongrum Ridaphun , Nongkynrih Irona , Vattakunnel Felix Mathew , Myrboh Bekington 
Published: August 2005

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Stereoselectivity Control in the Rh(I)‐Catalyzed Conjugate Additions of Aryl and Alkenylboronic Acids to Unprotected Hydroxycyclopentenones.
Authors: de la Herran Gabriela , Mba Miriam , Murcia M. Carmen , Plumet Joaquin , Csaky Aurelio G. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Perhydroxylation of Chiral Cycloheptatriene Ring Through Stepwise Oxidation under Regio‐ and Stereocontrol.
Authors: Sugimura Takashi , Kagawa Masami , Ohuchi Naoko , Inoue Aya , Okuyama Tadashi 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
TiCl(OiPr)3 and NaBH(OAc)3: An Efficient Reagent Combination for the Reductive Amination of Aldehydes by Electron‐Deficient Amines.
Authors: Gutierrez Corey D. , Bavetsias Vassilios , McDonald Edward 
Published: August 2005

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A RuH2(CO)(PPh3)3‐Catalyzed Regioselective Arylation of Aromatic Ketones with Arylboronates via Carbon—Hydrogen Bond Cleavage.
Authors: Kakiuchi Fumitoshi , Matsuura Yusuke , Kan Shintaro , Chatani Naoto 
Published: August 2005

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Dynamic Kinetic Resolution Catalyzed by Ir Axially Chiral Phosphine Catalyst: Asymmetric Synthesis of anti‐Aromatic β‐Hydroxy‐α‐amino Acid Esters.
Authors: Makino Kazuishi , Hiroki Yasuhiro , Hamada Yasumasa 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Lewis Base‐Catalyzed Diastereoselective Mannich‐Type Reaction Between Ketene Silyl Acetals and Chiral Sulfinimines.
Authors: Takahashi Eiki , Fujisawa Hidehiko , Yanai Toshiharu , Mukaiyama Teruaki 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Highly Regio‐ and Stereoselective Synthesis of 2(E),4‐Alkadienoates via the Pd(0)‐Catalyzed Reaction of Aryl Halides with 3,4‐Alkadienoates.
Authors: Fu Chunling , Ma Shengming 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Ethyl(benzothiazol‐2‐ylsulfonyl)acetate: A New Reagent for the Stereoselective Synthesis of α,β‐Unsaturated Esters from Aldehydes.
Authors: Blakemore Paul R. , Ho Danny K. H. , Nap W. Mieke 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
3‐Carboxypyridinium Chlorochromate‐Aluminum Chloride — An Efficient and Inexpensive Reagent System for the Selective Oxidation of Sulfides to Sulfoxides and Sulfones in Solution and under Microwave Irradiation.
Authors: Mohammadpoor‐Baltork Iraj , Memarian Hamid R. , Bahrami Kiumars 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Microwave Promoted Solvent‐Free One‐Pot Synthesis of N,N′‐Disubstituted Urea Derivatives.
Authors: Jadhav Vinod H. , Deshpande Shubhada S. , Borate Hanumant B. , Wakharkar Radhika D. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Antibacterial Activity of 2,4‐Dibenzyloxy (diallyloxy)carbonyl‐3‐aryl‐5‐hydroxy‐5‐methylcyclohexanones.
Authors: Gein V. L. , Zorina A. A. , Gein N. V. , Voronina E. V. , Kriven'ko A. P. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Simple (Imidazol‐2‐ylidene)‐Pd‐acetate Complexes as Effective Precatalysts for Sterically Hindered Suzuki—Miyaura Couplings.
Authors: Singh Rohit , Viciu Mihai S. , Kramareva Natalia , Navarro Oscar , Nolan Steven P. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Pd(0)‐Catalyzed Highly Selective Synthesis of 1,1‐Diarylpropadienes and 1,3‐Diarylpropynes from 1‐Aryl‐1‐propynes and Aryl Halides.
Authors: Ma Shengming , He Qiwen , Zhang Xiuhui 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
P‐Chiral 2‐{1′‐[Butyl(phenyl)phosphanyl] ferrocen‐1‐yl}‐4‐isopropyl‐4,5‐dihydrooxazoles: A Second Chirality Center in Catalytic System.
Authors: Drahonovsky Dusan , Stepnicka Petr , Dvorak Dalimil 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Palladium‐Catalyzed Intermolecular Three‐Component Coupling of Aryl Iodides, Alkynes, and Alkenes to Produce 1,3‐Butadiene Derivatives.
Authors: Shibata Kana , Satoh Tetsuya , Miura Masahiro 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Aziridines versus Vinyl Carbamates from the Direct Amination of Electron‐Withdrawing Group‐Substituted Trifluoromethyl Enoates.
Authors: Fioravanti Stefania , Colantoni Daniele , Pellacani Lucio , Tardella Paolo A. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
[3 + 2] Cycloaddition Reactions of Cyclopropylmethylsilanes and α‐Keto Aldehydes: trans‐ and cis‐Selective Formation of 2‐Silylmethyltetrahydrofurans.
Authors: Fuchibe Kohei , Aoki Yuji , Akiyama Takahiko 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
5‐endo‐dig Electrophilic Cyclization of 1,4‐Disubstituted But‐3‐yn‐1‐ones: Regiocontrolled Synthesis of 2,5‐Disubstituted 3‐Bromo‐ and 3‐Iodofurans.
Authors: Sniady Adam , Wheeler Kraig A. , Dembinski Roman 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of α,β‐Unsaturated 4,5‐Disubstituted γ‐Lactones via Ring‐Closing Metathesis Catalyzed by the First‐Generation Grubbs′ Catalyst.
Authors: Bassetti Mauro , D'Annibale Andrea , Fanfoni Alessia , Minissi Franco 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 1‐(6‐Methylbenzofuran‐2‐yl)‐3‐aryl/[4‐(β‐substituted ethoxy)phenyl]propenones as Marked anti‐Microbial Agents.
Authors: Reddy Y. Thirupathi , Reddy P. Narsimha , Mannan Md. Abdul , Kumar B. Sunil , Gururaj T. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Benzo[b]naphtho[2,3‐d]thiophene‐6,11‐diones via Palladium(II) Acetate Mediated Cyclization of 3‐Arylthio‐1,4‐naphthoquinone.
Authors: Ryu Chung‐Kyu , Choi Ik Hwa , Lee Jung Yoon , Jung Seong Hee 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Metal‐Mediated Entry to Functionalized 3‐Substituted 3‐Hydroxyindolin‐2‐ones via Regiocontrolled Carbonylallylation, Bromoallylation, 1,3‐Butadien‐2‐ylation, Propargylation, or Allenylation Reactions of Isatins in Aqueous Media.
Authors: Alcaide Benito , Almendros Pedro , Rodriguez‐Acebes Raquel 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Diversely Functionalized Hexahydropyrrolo[2,3‐b]indoles Using Domino Reactions, Olefination, Isomerization and Claisen Rearrangement Followed by Reductive Cyclization.
Authors: Kawasaki Tomomi , Ogawa Atsuyo , Terashima Romi , Saheki Toshiko , Ban Naoko , Sekiguchi Hiroko , Sakaguchi Ken‐ei , Sakamoto Masanori 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Stereoselective Alkenylation of a 1,3‐Disubstituted Pyrazol‐5‐one Through Ring Transformation of 2H‐Pyran‐2‐ones.
Authors: Sil Diptesh , Kumar Rishi , Sharon Ashoke , Maulik Prakas R. , Ram Vishnu Ji 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Mild, Efficient, and Chemoselective Dehydrogenation of 2‐Imidazolines, Bis‐imidazolines, and N‐Substituted‐2‐imidazolines with Potassium Permanganate Supported on Montmorillonite K‐10.
Authors: Mohammadpoor‐Baltork Iraj , Abdollahi‐Alibeik Mohammad 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
ortho‐Selective Direct Cross‐Coupling Reaction of 2‐Aryloxazolines and 2‐Arylimidazolines with Aryl and Alkenyl Halides Catalyzed by Ruthenium Complexes.
Authors: Oi Shuichi , Aizawa Emi , Ogino Yukako , Inoue Yoshio 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Highly Enantioselective Synthesis of (R)‐α‐Alkylserines via Phase‐Transfer Catalytic Alkylation of o‐Biphenyl‐2‐oxazoline‐4‐carboxylic Acid tert‐Butyl Ester Using Cinchona‐Derived Catalysts.
Authors: Lee Yeon‐Ju , Lee Jihye , Kim Mi‐Jeong , Kim Taek‐Soo , Park Hyeung‐geun , Jew Sang‐sup 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
3‐Bromo‐propenyl Acetate in Organic Synthesis: An Expeditious Route to 3‐Alkyl‐4‐acetoxy‐5‐iodomethyl Isoxazolidines.
Authors: Lombardo Marco , Rispoli Gabriele , Licciulli Sebastiano , Trombini Claudio , Dhavale Dilip D. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Utility of the Azido Transfer Protocol: Synthesis of 2‐ and 5‐Azido N‐Methylimidazoles, 1,3‐Thiazoles and N‐Methylpyrazole and Their Conversion to the Triazole—Azole Bisheteroaryls.
Authors: Zanirato Paolo , Cerini Stefano 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
N,N‐Dialkyl (N′‐Chlorosulfonyl)chloroformamidines in Heterocyclic Synthesis. Part 1. The Preparation of [1,2,3,5]Thiatriazole and [1,3,2,4]Oxathiadiazole Derivatives.
Authors: Fallon Gary D. , Jahangiri Saba , Liepa Andris J. , Woodgate Ruth C. J. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Stereoselective Synthesis of trans‐3,4‐Dihydropyran‐2‐ones by Phenoxide Ion‐Catalyzed Tandem Michael Addition and Lactonization.
Authors: Tozawa Takashi , Yamane Yoshinobu , Mukaiyama Teruaki 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A One‐Pot Synthesis of Nitrogen‐Containing Heteroaryl α‐Keto Amides from Heteroaryl Halides.
Authors: Zhu Juliang , Wong Henry , Zhang Zhongxing , Yin Zhiwei , Kadow John F. , Meanwell Nicholas A. , Wang Tao 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of 3,4‐Disubstituted Quinolin‐2(1H)‐ones via Palladium‐Catalyzed Regioselective Cross‐Coupling Reactions of 3‐Bromo‐4‐trifloxyquinolin‐2(1H)‐one with Arylboronic Acids.
Authors: Wu Jie , Zhang Liang , Sun Xiaoyu 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Direct, Two‐Step Synthetic Pathway to Novel Dibenzo[a,c]phenanthridines.
Authors: Churruca Fatima , SanMartin Raul , Carril Monica , Urtiaga Miren Karmele , Solans Xavier , Tellitu Imanol , Dominguez Esther 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and in vitro Antioxidant Activity of Some New Fused Pyridine Analogues.
Authors: Al‐Omar Mohamed A. , Youssef Khairia M. , El‐Sherbeny Mabda A. , Awadalla Sit. Albanat A. , El‐Subbagh Hussein I. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Rhodium‐Catalyzed Intramolecular Conjugate Addition of Vinylstannanes to 2,3‐Dihydro‐4‐pyridones. An Efficient Route to Stereoselective Construction of Indolizidines.
Authors: Dziedzic Magdalena , Malecka Marta , Furman Bartlomiej 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Facile and Convenient Syntheses of 6,11‐Dihydro‐5H‐indeno[1,2‐c]isoquinolin‐5‐ones and 6,11‐Dihydro‐5H‐indolo[3,2‐c]isoquinolin‐5‐one.
Authors: Jagtap Prakash G. , Baloglu Erkan , Southan Garry , Williams William , Roy Aloka , Nivorozhkin Alexander , Landrau Nelson , Desisto Kevin , Salzman Andrew L. , Szabo Csaba 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthetic Studies on Indoles and Related Compounds. Part 54. A New Synthesis of 4‐Oxygenated β‐Carboline Derivatives by Fischer Indolization.
Authors: Suzuki Hideharu , Tsukakoshi Yoshiyuki , Tachikawa Takuya , Miura Yuusuke , Adachi Makoto , Murakami Yasuoki 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A One‐Pot Synthesis of 3,4‐Dihydropyrimidin‐2‐(1H)‐ones from Primary Alcohols Promoted by Bi(NO3)3×5H2O in Two Different Media: Organic Solvent and Ionic Liquid.
Authors: Khosropour Ahmad R. , Khodaei Mohammd M. , Beygzadeh Mojtaba , Jokar Mahbubeh 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Some Aspects of Reaction of 6‐Aminouracil and 6‐Amino‐2‐thiouracil with α,β‐Unsaturated Ketones.
Authors: Chebanov Valentin A. , Saraev Vyacheslav E. , Gura Ekaterina A. , Desenko Sergey M. , Musatov Vladimir I. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis and Isomerization of Thienotriazolopyrimidine and Thienotetrazolopyrimidine Derivatives with Potential Antiinflammatory Activity.
Authors: Rashad A. E. , Heikal O. A. , El‐Nezhawy A. O. H. , Abdel‐Megeid F. M. E. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Fluorinated Heterocyclic Compounds. An Effective Strategy for the Synthesis of Fluorinated (Z)‐Oximes of 3‐Perfluoroalkyl‐6‐phenyl‐2H‐1,2,4‐triazin‐5‐ones via a Ring‐Enlargement Reaction of 3‐Benzoyl‐5‐perfluoroalkyl‐1,2,4‐oxadiazoles and Hydrazine.
Authors: Buscemi Silvestre , Pace Andrea , Piccionello Antonio Palumbo , Macaluso Gabriella , Vivona Nicolo , Spinelli Domenico , Giorgi Gianluca 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Studies on Triazene Derivatives of (1,x)‐Diazacycloalkanes. Part 2. Synthesis and Characterization of a Series of 4‐Methyl‐1‐[2‐aryl‐1‐diazenyl]‐1,4‐diazepanes and 1,4‐Di‐[2‐aryl‐1‐diazenyl]‐1,4‐diazepanes.
Authors: Moser Shasta Lee , Vaughan Keith 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of Tricyclic 4‐Chloro‐pyrimido[4,5‐b][1,4]benzodiazepines.
Authors: Yang Jianxin , Che Xin , Dang Qun , Wei Zhonglin , Gao Shu , Bai Xu 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Direct Heterocyclization of Benzocrown Ethers.
Authors: Shklyaev Yu. V. , Gorbunov A. A. , Rozhkova Yu. S. , Vshivkova T. S. , Vazhenin V. V. , Maiorova O. A. , Tolstikov A. G. , Dembitsky V. M. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Interaction of Silyl Triflates with Enamines: Iminium Ion Formation versus Silylation.
Authors: Levin Vitalij V. , Dilman Alexander D. , Belyakov Pavel A. , Korlyukov Alexander A. , Struchkova Marina I. , Tartakovsky Vladimir A. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Cyclic Chlorophosphites as Scaffolds for the One‐Pot Synthesis of α‐Aminophosphonates under Solvent‐Free Conditions.
Authors: Swamy K. C. Kumara , Kumaraswamy Sudha , Kumar K. Senthil , Muthiah C. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Pregnane‐Type Steroids from the Inedible Mushroom Thelephora terrestris.
Authors: Radulovic Niko , Quang Dang Ngoc , Hashimoto Toshihiro , Nukada Makiko , Tanaka Masami , Asakawa Yoshinori 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Longicalycinin A, a New Cytotoxic Cyclic Peptide from Dianthus superbus var. longicalycinus (Maxim.) Will.
Authors: Hsieh Pei‐Wen , Chang Fang‐Rong , Wu Ching‐Chung , Li Chien‐Ming , Wu Kuen‐Yuh , Chen Su‐Li , Yen Hsin‐Fu , Wu Yang‐Chang 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Synthesis of N3‐Substituted Uridine and Related Pyrimidine Nucleosides and Their Antinociceptive Effects in Mice.
Authors: Shimizu Tomomi , Kimura Toshiyuki , Funahashi Tatsuya , Watanabe Kazuhito , Ho Ing Kang , Yamamoto Ikuo 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A New Efficient Method of 1,2,4‐Triazole‐3‐carboxamide and Ribavirin Synthesis.
Authors: Chudinov M. V. , Konstantinova I. D. , Ryzhova O. I. , Esipov R. S. , Yurkevich A. M. , Shvets V. I. , Miroshnikov A. I. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Two New Isoflavonoids and a New 2‐Arylbenzofuran from the Roots of Erythrina variegata
Authors: Tanaka Hitoshi , Sudo Masaru , Hirata Miyuki , Sako Magoichi , Sato Masaru , Chen Ih‐Sheng , Fukai Toshio 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
A Facile Method for Synthesis of (R)‐(‐)‐ and (S)‐(+)‐Homocitric Acid Lactones and Related α‐Hydroxy Dicarboxylic Acids from D‐ or L‐Malic Acid.
Authors: Xu Peng‐Fei , Matsumoto Tsuyoshi , Ohki Yasuhiro , Tatsumi Kazuyuki 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Crystal‐Chemical Aspect of Formation of CdAs2—ZnAs2 Solid Solutions
Authors: Sanygin V. P. , Mikhailov S. G. , Palkina K. K. , Steblevskii A. V. , Kvardakov A. M. , Marenkin S. F. 
Published: August 2005

AbstractFor Abstract see ChemInform Abstract in Full Text.
Human T helper (Th) cell lineage commitment is not directly linked to the secretion of IFN‐γ or IL‐4: Characterization of Th cells isolated by FACS based on IFN‐γ and IL‐4 secretion
Authors: Cao Wuxiong , Chen Yangde , Alkan Sefik , Subramaniam Arun , Long Fan , Liu Hong , Diao Rong , Delohery Thomas , McCormick Jason , Chen Rong , Ni Donghui , Wright Paul S. , Zhang Xin , Busch Steve , Zilberstein Asher 
Published: August 2005

AbstractUpon activation in vitro, only a fraction of the bulk human T helper cell cultures secret the hallmark Th1/2 cytokines (IFN‐γ for Th1 and IL‐4 for Th2, respectively). It is uncertain whether these IFN‐γ–/IL‐4– cells are differentiated Th1 or Th2 cells. Here, we have characterized live IFN‐γ+, IL‐4+ and IFN‐γ–/IL‐4– cells isolated from Th cell cultures treated under Th1 or Th2 polarizing conditions by employing affinity matrix capture technology. RNA samples from the sorted cells were analyzed by real time RT‐PCR and microarrays. The double negative cells from either Th1 or Th2 cultures expressed lower levels of Th1/Th2 marker cytokine genes (IFNγ, IL4, and IL5). However, they were comparable with the IFN‐γ+ or IL‐4+ cells in the expression levels of other Th1/Th2 marker genes (GATA3, Tbet, and IL12Rβ2). Most importantly, these double negative cells were already committed in their Th1/Th2 lineages. Gene expression profiling analysis showed that very few previously identified Th1/Th2 marker genes were differentially expressed between the IFN‐γ or IL‐4 producers and the non‐producers, further underscoring the similarity between these two groups.
Reversible Bond Formation and Cleavage of the Oxo Bridge of [Ru2(μ‐O)(dioxolene)2(btpyxa)]3+ [btpyxa = 2,7‐Di‐tert‐butyl‐9,9‐dimethyl‐4,5‐bis(2,2′:6′,2′′‐terpyrid‐4′‐yl)xanthene] Driven by a Three‐Electron Redox Reaction
Authors: Wada Tohru , Tanaka Koji 
Published: August 2005

AbstractThe bis(chlororuthenium) complex [Ru2Cl2(3,6‐tBu2sq)2(btpyxa)](PF6)2 [1](PF6)2 [3,6‐tBu2sq = 3,6‐di‐tert‐butyl‐1,2‐benzosemiquinone; btpyxa = 2,7‐di‐tert‐butyl‐9,9‐dimethyl‐4,5‐bis(2,2′:6′,2′′‐terpyrid‐4′‐yl)xanthene] and the oxo‐bridged diruthenium complex [Ru2(μ‐O)(3,6‐tBu2sq)2(btpyxa)](PF6)3 [2](PF6)3 were synthesized, and the redox behavior of these complexes, which contain a non‐innocent dioxolene ligand, was investigated by electrochemical and electrospectrochemical methods. Dicationic [1]2+ undergoes two successive metal‐centered one‐electron and a simultaneous two‐electron ligand‐based redox reaction at E1/2 = +0.13 and +0.09 and E1/2 = –0.75 V (vs. SCE), respectively, in CH2Cl2. The UV/Vis/NIR spectrum of tricationic [2]3+ shows an intervalence‐transition (IT) band at 1333 nm (ϵ = 1.52 × 104 M–1 cm–1) in a near‐IR region together with two CT bands at 766 (ϵ = 2.21 × 104 M–1 cm–1) and 586 nm (ϵ = 1.13 × 104 M–1 cm–1) in CH2Cl2. The mixed‐valence complex of [2]3+ with an RuIV–O–RuIII core is reversibly oxidized and reduced to the RuIV–RuIV and RuIII–RuIII oxidation states at E1/2 = +0.63 and –0.01 V, respectively, in CH2Cl2. On the other hand, three‐electron reduction of [2](PF6)3 is accompanied by the cleavage of the Ru–O–Ru bond at Ep = +0.02 V to give [{Ru(OMe)(3,5‐tBu2sq)}{Ru(OH2)(3,5‐tBu2sq)}(btpyxa)]+ in MeOH. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)
Classical 1,2,4‐Triboracyclopentanes and Their Rearrangement into Nonclassical 2‐Boryl‐1,3‐diboracyclobutanes: Intramolecular C–H Bond Activation by a B–B Moiety
Authors: Scheschkewitz David , Amseis Peter , Geiseler Gertraud , Massa Werner , Hofmann Matthias , Berndt Armin 
Published: August 2005

Abstract1,2,4‐Triboracyclopentanes 1a–c in solution spontaneously transform into their nonclassical isomers 2a–c. These have been characterised by NMR spectroscopy and X‐ray structural analyses. Compounds 2a–c are strongly distorted when compared with the five‐membered ring of 1a, the structure of which was determined for comparison. In addition, the pattern of the substituents at the boron centres in 2a,b is different from that in 1a,b. This can be rationalised on the basis of a rapid topomerisation in 2c as determined by analysis of its temperature dependent 13C NMR spectra. The environment of the boron centres B1 and B3 is exchanged by transforming the two 3c–2e bonds which both involve B1 into a B2–H and a B1–C 2c–2e bond. This leads to the 2‐boryl‐1,3‐diboracyclobutane 4c and formation of corresponding new 3c–2e bonds employing B3 gives the topomer of 2c. The low barrier of this topomerisation reveals that 2a–c may also be regarded as nonclassical isomers of the 2‐boryl‐1,3‐diboracyclobutanes 4a–c. Ab initio computations of models at the MP4SDTQ/6‐311+G**// MP2/6‐311+G** levels support this interpretation. In addition, they show that the transformation of 1u to 2u occurs by an intramolecular C–H bond activation process initiated by the B–B moiety. Derivatives of the type 1 and 2 described here represent the first examples of 1,2‐diboron heterocycles which can be isolated as classical as well as nonclassical isomers. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)