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Showing 1 to 12 of 50 entries
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New strategies for natural products containing chroman spiroketals.

Pure and applied chemistry. Chimie pure et appliquee

Green JC, Burnett GL, Pettus TR.
PMID: 25554712
Pure Appl Chem. 2012;84(7):1621-1631. doi: 10.1351/PAC-CON-11-10-34.

Two cycloaddition strategies are described that lead to various chroman spiroketals from assorted exocyclic enol ethers. Unlike conventional thermodynamic ketalization strategies, the stereochemical outcome for this approach is determined by a kinetic cycloaddition reaction. Thus, the stereochemical outcome reflects...

Conformationally Constrained and Nanoparticle Targeted Paclitaxels.

Pure and applied chemistry. Chimie pure et appliquee

Kingston DG, Tamarkin L, Paciotti GF.
PMID: 25598555
Pure Appl Chem. 2012 Feb;84(6):1455-1467. doi: 10.1351/PAC-CON-11-09-02.

Paclitaxel (Taxol

Wetting in mixtures of colloids and excluded-volume polymers from density-functional theory.

The Journal of chemical physics

Bryk P.
PMID: 16392949
J Chem Phys. 2005 Dec 15;123(23):234907. doi: 10.1063/1.2129261.

We use a microscopic density-functional theory based on Wertheim's [J. Chem. Phys. 87, 7323 (1987)] first-order thermodynamic perturbation theory to study the wetting behavior of athermal mixtures of colloids and excluded-volume polymers. In opposition to the wetting behavior of...

Recent Applications of Imines as Key Intermediates in the Synthesis of Alkaloids and Novel Nitrogen Heterocycles.

Pure and applied chemistry. Chimie pure et appliquee

Martin SF.
PMID: 20046937
Pure Appl Chem. 2009;81(2):195-204. doi: 10.1351/PAC-CON-08-07-03.

One of the major challenges in contemporary synthetic organic chemistry is the design and development of new tactics and strategies and their application to concise and efficient syntheses of biologically active natural products. Strategies that utilize reactions that enable...

Application of Rhodium-Catalyzed Cyclohydrocarbonylation to the Syntheses of Enantiopure Homokainoids.

Pure and applied chemistry. Chimie pure et appliquee

Chiou WH, Schoenfelder A, Mann A, Ojima I.
PMID: 19693284
Pure Appl Chem. 2008;80(5):1019-1024. doi: 10.1351/pac200880051019.

Kainic acid, rigidified (S)-glutamic acid, is a well-known kainite receptor agonist for the excitatory transmission in the central nerve system. Our interest in highly selective kainite ligands, prompted us to design a series of new kainic homologues, "homokainoids", i.e.,...

Genetics of sweet taste preferences.

Pure and applied chemistry. Chimie pure et appliquee

Bachmanov AA, Reed DR, Li X, Beauchamp GK.
PMID: 18270552
Pure Appl Chem. 2002 Jul 01;74(7):1135-1140. doi: 10.1351/pac200274071135.

Inbred mouse strains display marked differences in avidity for sweet solutions due in part to genetic differences among strains. Using several techniques, we have located a number of regions throughout the genome that influence sweetener acceptance. One prominent locus...

An ignored risk factor in toxicology: The total imprecision of exposure assessment.

Pure and applied chemistry. Chimie pure et appliquee

Grandjean P, Budtz-Jørgensen E.
PMID: 20419070
Pure Appl Chem. 2010 Jan 25;82(2):383-391. doi: 10.1351/PAC-CON-09-05-04.

Quality assurance of exposure biomarkers usually focuses on laboratory performance only. Using data from a prospective birth cohort study in the Faroe Islands, we have assessed the total imprecision of exposure biomarkers. As biomarkers of prenatal methylmercury exposure, mercury...

Progress toward red and near-infrared (NIR) emitting saccharide sensors.

Pure and applied chemistry. Chimie pure et appliquee

Sibrian-Vazquez M, Escobedo JO, Lowry M, Strongin RM.
PMID: 23504507
Pure Appl Chem. 2012 Nov 01;84(11):2443-2456. doi: 10.1351/PAC-CON-11-11-06. Epub 2012 Apr 29.

Red-shifted and near-infrared (NIR)-active rhodamine analogs and their boronic acid derivatives were synthesized and studied. These latter compounds function as fluorogenic NIR active substrates for sugar sensing. The effects of benzannulation and boronic acid functionalization on fluorophore optical and...

Enzymatic Catalysis of Proton Transfer and Decarboxylation Reactions.

Pure and applied chemistry. Chimie pure et appliquee

Richard JP.
PMID: 23505326
Pure Appl Chem. 2011 Jul 08;83(8):1555-1565. doi: 10.1351/PAC-CON-11-02-05.

Deprotonation of carbon and decarboxylation at enzyme active sites proceed through the same carbanion intermediates as for the uncatalyzed reactions in water. The mechanism for the enzymatic reactions can be studied at the same level of detail as for...

Studies for the synthesis of marine natural products.

Pure and applied chemistry. Chimie pure et appliquee

Williams DR, Walsh MJ, Claeboe CD, Zorn N.
PMID: 20126417
Pure Appl Chem. 2009;81(2):181. doi: 10.1351/PAC-CON-08-07-23.

The process of allylic transposition in S(E)' reactions is a significant construct for synthesis. The flexibility of a variety of allylation strategies provides for the rational design of pathways to a diverse array of complex targets. Our recent studies...

Anti-proliferative withanolides from the Solanaceae: a structure-activity study.

Pure and applied chemistry. Chimie pure et appliquee

Zhang H, Samadi AK, Cohen MS, Timmermann BN.
PMID: 24098060
Pure Appl Chem. 2012;84(6):1353-1367. doi: 10.1351/PAC-CON-11-10-08.

As part of our search for bioactive compounds from plant biodiversity, 29 withanolides (

Davydov-type excitonic effects on the absorption spectra of parallel-stacked and herringbone aggregates of pentacene: Time-dependent density-functional theory and time-dependent density-functional tight binding.

The Journal of chemical physics

Darghouth AAMHM, Correa GC, Juillard S, Casida ME, Humeniuk A, Mitrić R.
PMID: 30292200
J Chem Phys. 2018 Oct 07;149(13):134111. doi: 10.1063/1.5025624.

Exciton formation leads to J-bands in solid pentacene. Describing these exciton bands represents a challenge for both time-dependent (TD) density-functional theory (DFT) and for its semi-empirical analog, namely, for TD density-functional tight binding (DFTB) for three reasons: (i) solid...

Showing 1 to 12 of 50 entries