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Reagent System (reagent + system)

Distribution by Scientific Domains
Chemistry95%

Selected Abstracts

ChemInform Abstract: Cerium(III) Chloride Heptahydrate,Lithium Iodide: A Novel Reagent System for the Synthesis of N-Arylpyrrolidines.

CHEMINFORM, Issue 11 2010
J. S. Yadav
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: KBrO3/MoO3: An Efficient Reagent System for the Oxidative Deprotection of Semicarbazones, 1,1-Diacetates and Acetals.

CHEMINFORM, Issue 36 2009
Farhad Shirini
Abstract 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Desulfurization of Thioamides into Amides with H2O2/ZrCl4 Reagent System.

CHEMINFORM, Issue 24 2009
Kiumars Bahrami
Abstract 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: A Simple and Convenient Method for the Synthesis of Cyclobutenediones from Alkynes Using New Fe(CO)5/NaH/MeI Reagent System.

CHEMINFORM, Issue 52 2008
Mariappan Periasamy
Abstract 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: An Efficient Synthesis of 4-Alkoxy-5,6-dihydro-furo(and -thieno)[2,3-d]pyrimidines Using Zinc Chloride/Triethylamine Reagent System.

CHEMINFORM, Issue 30 2008
Hiroshi Maruoka
Abstract 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 of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

CeCl3×7H2O/LiI: A Novel Reagent System for the Synthesis of 4-Iodotetrahydropyrans via Prins Cyclization.

CHEMINFORM, Issue 32 2007
J. S. Yadav
Abstract 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. [source]

Indium(III) Chloride/2-Iodoxybenzoic Acid: A Novel Reagent System for the Conversion of Indoles into Isatins.

CHEMINFORM, Issue 27 2007
J. S. Yadav
Abstract 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. [source]

Synthesis of Enynones from Alkynes, Alkynyl Ketones and Aromatic Aldehydes Using the TiCl4/Et3N Reagent System.

CHEMINFORM, Issue 3 2007
Mariappan Periasamy
Abstract 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. [source]

A One-Pot Selective Deprotective Acetylation of Benzyl Ethers and OTBDMS Ethers Using the BF3×Et2O,NaI,Ac2O Reagent System.

CHEMINFORM, Issue 45 2006
Anita Brar
Abstract 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. [source]

KBrO3/ZrClO2×8H2O: An Efficient Reagent System for the Oxidation of Alcohols.

CHEMINFORM, Issue 42 2005
Farhad Shirini
No abstract is available for this article. [source]

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.

CHEMINFORM, Issue 37 2005
Iraj Mohammadpoor-Baltork
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Reduction of Activated Conjugated Alkenes by the InCl3,NaBH4 Reagent System.

CHEMINFORM, Issue 4 2004
Brindaban C. Ranu
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

R3Al,R,3SiOTf: Novel and Powerful Reagent System for Stereospecific Alkylation,Silylation Reactions of Epoxides.

CHEMINFORM, Issue 51 2003
Ponnusamy Shanmugam
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

R3Al,R,3SiOTf: Novel and Powerful Reagent System for Stereospecific Alkylation,Silylation Reactions of Epoxides.

CHEMINFORM, Issue 51 2003
Ponnusamy Shanmugam
No abstract is available for this article. [source]

ChemInform Abstract: Aromatization of Enamines Using the TiCl4/Et3N Reagent System.

CHEMINFORM, Issue 30 2002
Gadthula Srinivas
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: A New Catalytic Enantioselective Reducing Reagent System from (-)-,,,-Diphenylpyrrolidinemethanol and 9-Borabicyclo[3.3.1]nonane, Especially Effective for Hindered and Substituted Aralkylketones.

CHEMINFORM, Issue 28 2002
Josyula V. B. Kanth
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: New Methods of Hydroformylation of Olefins and Isomerization of Allyl Alcohols Using the CoBr2/Zn/CO/t-BuOH Reagent System.

CHEMINFORM, Issue 5 2002
Thotapally Rajesh
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: Novel Synthesis of Cyclobutanone Derivatives via Dimetalation of Iminium Ions with the TiCl4,Trialkylamine Reagent System.

CHEMINFORM, Issue 2 2002
Mariappan Periasamy
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: New Halogenation Reagent System for One-Pot Conversion of Alcohols into Iodides and Azides.

CHEMINFORM, Issue 35 2001
Ahmed Kamal
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

ChemInform Abstract: A New Reagent System for Modified Ullmann-Type Coupling Reactions: NiCl2 (PPh3)2/PPh3/Zn/NaH/Toluene.

CHEMINFORM, Issue 34 2001
Guo-Qiang Lin
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

Competition between Non-Classical Single and Double Epimerizations in Cyclitol Chemistry

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 9 2004
Ralf Miethchen
Abstract Two competitive regio- and stereoselective epimerization reactions were investigated in four cyclitols characterized by four contiguous OH groups with a cis - trans - trans sequence and by varied substituents (OMe, OBz, F, H) adjacent to this tetrol unit. The starting materials were synthesized from L -quebrachitol (compounds 5,7) and myo -inositol (compound 8). Their acetalization with the chloral/DCC reagent system gave cyclic acetals with one epimerized chiral ring atom and also with two epimerized chiral centres. The single epimerization takes place exclusively at the middle C-atom of the cis - trans triol unit in the tetrol sequence (products 15, 17, 19/20 and 24,27), whereas the double epimerization occurs at both of the "centrally located" C-atoms in the cis - trans - trans tetrol unit (products 16, 18, 21 and 28). The product ratios of singly to doubly inverted compounds change as follows: the lower the electron-withdrawing effect of the substituents adjacent to the tetrol unit, the higher the percentage of the corresponding doubly inverted product. However, the singly inverted products remain the major products in all cases. X-ray analyses are given for the starting material 1-fluoro-2- O -(methyl)cyclohexane-2,3,4,5,6-pentol (5) and for the products 1- O -cyclohexylcarbamoyl-2,3- O -(2,2,2-trichloroethylidene)5- O -(methyl)cyclohexane-1,2,3,4,5-pentol (17), 3- O -acetyl-1- O -benzoyl-6- O -cyclohexylcarbamoyl-2- O -methyl-4,5- O -(2,2,2-trichloroethylidene)- muco -inositol (22) and 2,3-di- O -ethylidene)-(+/-)- chiro -inositol (24). (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004) [source]

Accelerated stability model for predicting shelf-life

JOURNAL OF CLINICAL LABORATORY ANALYSIS, Issue 5 2002
Robert T. Magari
Abstract Second- and higher-order degradation reactions sometimes cannot be approximated with linear or exponential relationships and need to be appropriately modeled. Events above the COULTER® HmX Analyzer white blood cell (WBC) counting threshold were recorded for the HmX PAK reagent system stored at five elevated temperatures. An accelerated stability model for a second-degree polynomial degradation pattern was used. The shelf-life of the reagent, along with 95% lower bound confidence intervals, is predicted using the same pattern of degradation as well as the Arrhenius approximation. Experiments indicated that the degradation of the HmX PAK reagent occurred in two phases, the lag phase and the degradation phase, in all tested temperatures. The phase durations are temperature-dependent, and the Arrhenius approximation is appropriate (P=0.639). The degradation of the reagent during the lag phase was experimentally undetectable. Changes of the reagent were nonsignificant for a predicted period of 164 days at 25°C. The rate of degradation increased significantly later on during the degradation phase. The lower bound of the 95% confidence interval of this prediction indicated that it would take at least 326 days before the HmX PAK reagent would have any performance issue related to aging at storage temperature. J. Clin. Lab. Anal. 16:221,226, 2002. © 2002 Wiley-Liss, Inc. [source]

Regioselective Synthesis of Phenols and Halophenols from Arylboronic Acids Using Solid Poly(N -vinylpyrrolidone)/ Hydrogen Peroxide and Poly(4-vinylpyridine)/Hydrogen Peroxide Complexes

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 10 2009
K. Surya Prakash
Abstract Solid hydrogen peroxide complexes based on poly(N -vinylpyrrolidone) and poly(4-vinylpyridine) were prepared and used as solid hydroxylating reagents. These solid hydrogen peroxide equivalents are found to be much safer, convenient and efficient reagent systems for the ipso -hydroxylation of arylboronic acids to the corresponding phenols in high yields at a faster rate. The versatility of the reagents has been further expanded for the one-pot synthesis of halophenols. Density functional theory calculations were carried out on hydrogen peroxide complexes of N -ethylpyrrolidone and 4-ethylpyridine as models to get a better understanding of structure and behavior of hydrogen peroxide complexes of the polymers poly(N -vinylpyrrolidone) and poly(4-vinylpyridine) compared to aqueous hydrogen peroxide. [source]