Abstract:
L'invention concerne un composé de formule générale (I)représentée ci-après: ainsi qu'une composition comprenant au moins ledit composé de formule (I),et ses utilisations en parfumerie.
Abstract:
Substrates (such as cycloalkalnes, polycyclic hydrocarbons or aromatic compounds having methyl or methylene adjacent to their respective aromatic rings) are converted into oxides (such as ketones, alcohols or carboxylic acids) through oxygenation in the presence of an oxidation catalyst system comprising an imide compound of general formula (1) (such as N-hydroxyphthalimide) and a co-catalyst containing an element selected from the group consisting of group 2A elements of the periodic table, transition metals (group 3A to 7A, 8, 1B and 2B elements of the periodic table) and group 3B elements of the periodic table (except phosphovanadomolybdic acid) (wherein R and R are each hydrogen or a substituent such as halogen, or alternatively R and R may be united to form a double bond or an aromatic or non-aromatic 5- to 12-membered ring; X is O or OH; and n is 1 to 3).
Abstract:
The invention relates to a method of oxidizing an alcohol to form an aldehyde or ketone using a ruthenium ion and oxygen in the presence of a substantially stable N-O free radical compound, wherein two atoms bound to the nitrogen atom are not themselves hydrogen carriers. It has been found that with such a combination of a ruthenium ion and radical compound not only easily oxidizable alcohols can be oxidized without the formation of carboxylic acid, but also alcohols that are difficult to oxidize, such as aliphatic alcohols having diverse functional groups, e.g. steroid alcohols and saccharide derivatives.
Abstract:
Novel antibiotic compounds being tricyclic sesquiterpenes of formula (I) and derivatives thereof are described, wherein R , R , R , R and R independently are the same or different substituents chosen from the group comprising =O, -OH, -OR, where R is straight or branched C1-12 alkyl, and straight or branched C1-12 alkyl, and Z means a single or double bond.
Abstract:
Acid addition salts of imidazolidinones are provided as catalysts for transforming a functional group within a first reactant by reaction with a second reactant. Exemplary first reactants are alpha , beta -unsaturated carbonyl compounds such as alpha , beta -unsaturated ketones and alpha , beta -unsaturated aldehydes. Chiral imidazolidinone salts can be used to catalyze enantioselective reactions, such that a chiral product is obtained from a chiral or achiral starting material in enantiomerically pure form.
Abstract:
The present invention relates to novel oxidative processes for substrates such as olefins, alkanes, aromatics and alcohols using metallic porphyrin or salen catalytic complexes which have been specifically designed to maximize catalytic activity, thereby enhancing efficiency, selectivity and speed of oxidation of these substrates. The choice of the substituents in the metallic complexes may be varied, but must be chosen to prevent specific ligand set arrangements known to be stable and therefore less catalytically efficient. Coordination complexes, particularly porphyrins and salens having nitrosyl axial ligands and electron-withdrawing peripheral substituents are preferred. Ruthenium coordination metals are the preferred metal center, with the highly reactive catalytic species found to be Ru . The catalysts of the present invention can also be incorporated into heterogeneous forms such as on solid support structures, including molecular sieves.
Abstract:
15,16-Seco-19-nor progestins are provided which display elevated progestational activity with a minimum of ancillary hormonal activity. Processes for the preparation of the novel progestins are provided as are methods of use. A preferred method of use is in the suppression of ovulation in the human female.