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Their Derivatives (their + derivative)

Distribution by Scientific Domains
Chemistry96%

Selected Abstracts

Strong Ultra-Broadband Near-Infrared Photoluminescence from Bismuth-Embedded Zeolites and Their Derivatives

ADVANCED MATERIALS, Issue 36 2009
Hong-Tao Sun
Zeolites with embedded bismuth compounds display strong, air-stable, long-lived, ultrabroadband, and tunable near-infrared photoluminescence (see picture). Bismuth ions not only act as luminescence-active centers, but also as blocks for selectively closing the "in,out windows" of water molecules. Bismuth active centers can be sealed in a low-vibrational environment by bismuth agglomerates even when the sample still contains a large amount of water. [source]

Development of New and Selective Trypanosoma cruzi trans-Sialidase Inhibitors from Sulfonamide Chalcones and Their Derivatives

CHEMBIOCHEM, Issue 15 2009
Jin Hyo Kim
Abstract A series of sulfonamide-containing hydroxylated chalcone (4,7) and quinolinone (8, 9) derivatives was synthesised and tested for inhibition of the trans-sialidase from Trypanosoma cruzi (TcTS). IC50 values for these inhibitors ranged from 0.6 to 7.3 ,M, with the dihydroxylated (catechol) derivatives being the tightest binders. Full kinetic analyses of inhibition were performed for these catechol derivatives, both for the transglycosylation reaction in the presence of lactose and for the hydrolysis reaction in its absence. Competitive inhibition was seen in each case with Ki values for 5, 7 and 9 of 2.0, 2.2 and 0.2 ,M, respectively, in the absence of lactose, and 4.6, 3.7 and 0.4 ,M in its presence. None of the compounds tested showed any significant inhibition of the human sialidase Neu2, at concentrations up to 200 ,M. [source]

ChemInform Abstract: FeCl3·6H2O Catalyzed Disproportionation of Allylic Alcohols and Selective Allylic Reduction of Allylic Alcohols and Their Derivatives with Benzylic Alcohol.

CHEMINFORM, Issue 37 2009
Jialiang Wang
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: Synthesis and Biological Activity of ,-Alkylacrolein Dimers and Their Derivatives.

CHEMINFORM, Issue 31 2009
N. M. Karpiak
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: Highly Efficient Selective Monohydrolysis of Dialkyl Malonates and Their Derivatives.

CHEMINFORM, Issue 40 2008
Satomi Niwayama
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: Denitrocyclization in Synthesis of Dibenzo[b,f][1,4]thiazepin-11(10H)-ones and Their Derivatives.

CHEMINFORM, Issue 12 2008
Alexey V. Smirnov
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 Practical and Efficient Procedure for Reduction of Carboxylic Acids and Their Derivatives: Use of KBH4,MgCl2.

CHEMINFORM, Issue 5 2008
You-Chun Qiu
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]

Synthesis and Structure of 7-Alkoxyalkyl-3-thia-7-azabicyclo[3.3.1]nonan-9-ones and Several of Their Derivatives.

CHEMINFORM, Issue 2 2007
V. K. Yu
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]

Nucleophilic Addition of Ethyl 3-Bromodifluoromethyl-3-benzyloxyacrylate to Imines: An Effective Entry to Novel gem-Difluorinated Amino Esters and Their Derivatives.

CHEMINFORM, Issue 24 2006
Weimin Peng
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]

2-(Adamantan-1-yl)imidazo[1,2-a]pyridines and Their Derivatives.

CHEMINFORM, Issue 11 2006
R. I. Yurchenko
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 Imidazole, Coumarin and Isoxazole Containing New Triheterocyclic Compounds and Their Derivatives.

CHEMINFORM, Issue 28 2005
E. Rajanarendar
No abstract is available for this article. [source]

Preparation and Properties of the Full Series of Cuboidal Clusters [MoxW4-xSe4(H2O)12] n+ (n = 4,6) and Their Derivatives.

CHEMINFORM, Issue 20 2005
M. Sokolov
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Palladium-Catalyzed Silastannation of Secondary Propargylic Alcohols and Their Derivatives.

CHEMINFORM, Issue 42 2004
Thomas E. Nielsen
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Microwave Irradiation for Accelerating Each Step for the Synthesis of 1,2,4-Triazino[5,6-b]indole-3-thiols and Their Derivatives from Isatin and 5-Chloroisatin.

CHEMINFORM, Issue 30 2004
El Sayed H. El Ashry
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Novel One-Pot Synthesis of 3-Acetyl-5-hydroxy-2-methylbenzofuran and 3-Acetyl-5-hydroxy-2-methylnaphthofuran and Synthesis of Their Derivatives.

CHEMINFORM, Issue 42 2003
Guru S. Gadaginamath
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Efficient Synthesis of N-Benzyloxycarbonyl- and N-tert-Butoxycarbonyl-(S)-isoserine and Their Derivatives.

CHEMINFORM, Issue 11 2003
Ryszard Andruszkiewicz
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Desymmetrization of meso Difuryl Alcohols, Diols and Their Derivatives: Complementary Directed and Undirected Asymmetric Dihydroxylation Reactions.

CHEMINFORM, Issue 47 2002
Robert Hodgson
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

Modification of A and B Rings in 20-Dihydroisoxazolyl Steroids and Their Derivatives with a Functionalized Side Chain.

CHEMINFORM, Issue 47 2002
R. P. Litvinovskaya
Abstract For Abstract see ChemInform Abstract in Full Text. [source]

ChemInform Abstract: Stereoselective Synthesis of (Z)-Enethiols and Their Derivatives: Vinylic SN2 Reaction of (E)-Alkenyl(phenyl)-,3 -iodanes with Thioamides.

CHEMINFORM, Issue 51 2001
Masahito Ochiai'
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: Synthesis and Antimicrobial Activity of [3,5-Dibromo(dichloro)-1-hydroxy-4-oxocyclohexa-2,5-dien-1-yl]acetic Acids and Their Derivatives.

CHEMINFORM, Issue 47 2001
O. P. Shestak
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: Synthesis and Biological Evaluation of 3-Substituted-4- [2,-(4,,-isobutylphenyl)propionamido]-5-mercapto-1,2,4-triazoles and Their Derivatives.

CHEMINFORM, Issue 28 2001
R. H. Udupi
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: Synthesis and Properties of Azoles and Their Derivatives.

CHEMINFORM, Issue 19 2001
Part 45.
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]

Double Ring-Closing Metathesis Reaction of Nitrogen-Containing Tetraenes: Efficient Construction of Bicyclic Alkaloid Skeletons and Synthetic Application to Four Stereoisomers of Lupinine and Their Derivatives

CHEMISTRY - A EUROPEAN JOURNAL, Issue 13 2004
Shengming Ma Prof.
Abstract The double ring-closing metathesis reaction of nitrogen-containing tetraenes was studied. The selectivity of the fused/dumbbell-type products can be controlled by the electronic/steric effects of the substituents attached to the CC bonds and the s - cis/s - trans conformational ratios of the substrates. This methodology has also been successfully applied to the enantioselective synthesis of four stereoisomers of lupinine and their derivatives. [source]

1-Alkynylphosphines and Their Derivatives as Key Starting Materials in Creating New Phosphines

CHEMISTRY - AN ASIAN JOURNAL, Issue 3 2010
Azusa Kondoh
Abstract This Focus Review summarizes transformations of 1-alkynylphosphines and their derivatives directed toward the synthesis of new phosphines. Owing to the importance of organophosphines as ligands for transition metal catalysts, development of efficient methods for the synthesis of new phosphines is quite important. 1-Alkynylphosphines and their derivatives have been emerging as useful precursors for the creation of new phosphines. Chemical modifications of the carbon,carbon triple bonds, including nucleophilic addition and cycloaddition, lead to a wide range of new useful phosphines that are otherwise difficult to synthesize. [source]

Antitumor-Promoting Effects and Cytotoxic Activities of Dammar Resin Triterpenoids and Their Derivatives

CHEMISTRY & BIODIVERSITY, Issue 8 2010
Motohiko Ukiya
Abstract Nineteen known triterpenoids, 1,19, and one known sesquiterpenoid, 20, were isolated from dammar resin obtained from Shorea javanica K. & V. (Dipterocarpaceae). One of the acidic triterpenoids, dammarenolic acid (1), was converted to fourteen derivatives, namely, an alcohol, 21, an aldehyde, 22, and twelve L -amino acid conjugates, 23,34. Compounds 1,34 were examined for their inhibitory effects on the induction of Epstein,Barr virus early antigen (EBV-EA) by 12- O -tetradecanoylphorbol 13-acetate (TPA) in Raji cells, a known primary screening test for antitumor promoters. All of the compounds tested, except for compounds 4, 5, 12,14, 16, and 17, showed inhibitory effects against EBV-EA activation with potencies either comparable with or stronger than that of , -carotene, a known natural antitumor promoter. In addition, (20S)-20-hydroxy-3,4-secodammara-4(28),24-dien-3-al (22) exhibited inhibitory effects on skin tumor promotion in an in vivo two-stage mouse skin carcinogenesis test based on 7,12-dimethylbenz[a]anthracene (DMBA) as initiator, and with TPA as promoter. Furthermore, evaluation of the cytotoxic activities of compounds 1,34 against human cancer cell lines showed that reduction (i.e., 21 and 22) or conjugation with L -amino acids (i.e., 23,34) of compound 1 enhanced the cytotoxicity against human melanoma cell line CRL1579. [source]