Abstract:
This invention concerns a process for the production of vinyl esters of carboxylic acids with 3 to 20 carbon atoms, via vinylation in the presence of palladium (Pd) catalyst in combination with copper (Cu) as co-catalyst stabilized by organic salts in the presence of ethylene and air or oxygen.
Abstract:
The patent application relates to a method of producing a monomer component from a genetically modified polyhydroxyalkanoate (PHA) biomass, wherein the biomass is heated in the presence of a catalyst to release a monomer component from the PHA.
Abstract:
The application is directed to a process for the production of a biobased gamma -butyrolactone product, comprising combining a genetically engineered biomass comprising poly- 4 -hydroxy-butyrate and a catalyst, and heating the biomass with the catalyst to convert the poly- 4 -hydroxybutyrate to a gamma -butyrolactone product.
Abstract:
The invention pertains to the use of Group 8 transition metal carbene complexes as catalysts for olefin cross-metathesis reactions. In particular, ruthenium and osmium alkylidene complexes substituted with an N-heterocyclic carbene ligand are used to catalyze cross-metathesis reactions to provide a variety of substituted and functionalized olefins, including phosphonate-substituted olefins, directly halogenated olefins, 1,1,2-trisubstituted olefins, and quaternary allylic olefins. The invention further provides a method for creating functional diversity using the aforementioned complexes to catalyze cross-metathesis reactions of a first olefinic reactant, which mayor may not be substituted with a functional group, with each of a plurality of different olefinic reactants, which may or may not be substituted with functional groups, to give a plurality of structurally distinct olefinic products. The methodology of the invention is also useful in facilitating the stereoselective synthesis of 1,2-disubstituted olefins in the cis configuration.
Abstract:
A process for the preparation of an alkenyl derivative of a Bronsted acid by the transvinylation reaction of an alkenyl derivative of a first Bronsted acid with a second Bronsted acid includes azeotropic distillation of the transvinylation reaction mixture for the separation and recovery as a product the alkenyl derivative of the second Bronsted acid.
Abstract:
The present invention relates to a novel simple, efficient and single-step process for esterification of aldehydes using a heterogeneous catalyst with high yields. More particularly, the present invention relates to a novel simple, efficient and single-step process for esterification of aldehydes using Titanium superoxide with greater than 80% yields.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von Carbonsäurevinylestern, wobei man eine Carbonsäure mit einer Alkinverbindung in Anwesenheit eines Katalysators, der ausgewählt ist unter Carbonylkomplexen, HaIogeniden und Oxiden des Rheniums, Mangans, Wolframs, Molybdäns, Chroms und Eisens und Rheniummetall, bei einer Temperatur von
Abstract:
The invention is directed to a process for the preparation of αβ,-unsaturated acids, esters and amides from α or β-hydroxycarboxylic acids or esters or precursors in high yields and high selectivity. The α,β-unsaturated acids or esters are optionally prepared in the presence of specific dehydration and/or esterification catalysts. The α,β-unsaturated amides or substituted amides are prepared optionally in the presence of a dehydration and/or amidation catalyst. The source of α or β-hydroxycarboxylic acids or precusor is preferably from a renewable resource. The precursor is defined herein.
Abstract:
This invention relates to aliphatic carbonyl compounds of formula I wherein, their manufacture and their use in fragrance compositions.[insert formula I here]R1 to R4, X and Y have the meaning as described in the specification