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Polyfunctional Compounds (polyfunctional + compound)

Distribution by Scientific Domains
Chemistry100%

Selected Abstracts

ChemInform Abstract: Ozonolysis of Alkenes and Study of Reactions of Polyfunctional Compounds.

CHEMINFORM, Issue 38 2001
Part 63.
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]

New Functionalised Hydroxymethyl Ketones from the Mild and Chemoselective KMnO4 Oxidation of Chiral Terminal Olefins

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 1 2006
Carlo Bonini
Abstract Various terminal olefinic compounds are directly converted into the corresponding ,-hydroxy ketones in good yields by potassium permanganate oxidation. The reaction is also highly chemoselective in the presence of differently protected hydroxy groups and can be utilised for the preparation of polyfunctional compounds such as polyols. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006) [source]

Enantioselective Organocatalytic Michael Addition of ,-Substituted Cyanoacetates to ,,,-Unsaturated Selenones

ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1-2 2009
Francesca Marini
Abstract A novel enantioselective (up to 90% ee) Michael addition of ,-substituted cyanoacetates to ,,,-unsaturated selenones in the presence of bifunctional urea and thiourea organocatalysts is described. The Michael adducts, containing an all-carbon quaternary stereocenter, are smoothly converted into synthetically useful polyfunctional compounds by taking advantage of the excellent leaving group ability of the selenone group. [source]

Enzyme-Triggered and Self-Cleaving Fragrant Alcohol Precursors

CHEMISTRY & BIODIVERSITY, Issue 6 2008
Felix Flachsmann
Abstract The high volatility and water solubility of many natural perfumery alcohols leads to their rapid loss in fabric-care and personal-care applications. A dramatically enhanced substantivity is achieved by the use of fragrance precursors as controlled-release systems. In the first part of this article, we present multi-odorant precursors, in which the enzymatic cleavage of esters or carbonates of fragrant alcohols triggers subsequent steps leading to the release of fragrant ketones, lactones, and additional fragrant alcohols. In the second part, a study on oligocarbonates of fragrant alcohols is presented. Therein, the outstanding enzyme-independent performance of gluconolactone oligocarbonate 27 for the long-lasting release of (Z)-hex-3-en-1-ol is highlighted. We show that these polyfunctional compounds undergo complex rearrangements and intramolecular substitution reactions which lead to the observed release kinetics. [source]