Abstract:
The present invention relates to processes for the reduction by hydrogenation, using molecular H2, of a C5-C20 substrate containing one or two aldehydes functional groups into the corresponding alcohol or diol, characterized in that said process is carried out in the presence of —at least one catalyst or pre-catalyst in the form of a ruthenium complex having a coordination sphere of the N2P2O2, wherein the coordinating atoms N2 are provided by a first bidentate ligand, the coordinating atoms P2 are provided by a second bidentate ligand and the coordinating atoms O2 are provided by two non-linear carboxylate ligands; and—optionally of an acidic additive.
Abstract:
Providing a catalytic process for preparing 1,4-diketone compounds from furanic compounds and their precursors in a liquid medium, using an acid catalytic system and optionally in the presence of hydrogen and a hydrogenation catalyst, wherein the acidic catalytic system comprises a solid acid catalyst or a mixture of water and CO2.
Abstract:
A composition for use as an antifreeze, deicing agent, or anti-icing agent produced from the crude glycerol byproduct of the C 1 to C 4 alkyl alcohol alcoholysis of a glyceride comprised of: on a water-free basis, from about 0.5% to about 60% glycerol, and from about 20% to about 85% propylene glycol.
Abstract:
Use of ionic liquids as solvents in base-catalysed chemical reactions wherein the ionic liquid is composed of at least one species of cation and at least one species of anion, characterised in that a cation of the ionic liquid comprises a positively charge moiety and a basic moiety, and further wherein such ionic liquids may be used as promoters or catalysts for the chemical reactions.
Abstract:
The invention relates to a novel processes for cross aldol reactions using strongly basic, anionic, macroreticular polymeric resin with quaternary ammonium groups of the type -CH2N+(CH3)3 as heterogeneous catalysts. This catalyst is recyclable and the process can be repeated several times.
Abstract:
A reactive-separation process converts glycerin into lower alcohols, having boiling points less than 2000C, at high yields. Conversion of natural glycerin to propylene glycol through an acetol intermediate is achieved at temperatures from 150° to 2500C at pressures from 1 and 25 bar. The preferred applications of the propylene glycol are as an antifreeze, deicing compound, or anti-icing compound. The preferred catalyst for this process in a copper-chromium.
Abstract:
The present invention relates to a process for the preparation of compounds of a 1,4-dialkyl-2,3-diol-1,4-butanedione by a catalytic aldol condensation between an alkyl glyoxal and an a-hydroxy ketone.
Abstract:
Use of ionic liquids as solvents in base-catalysed chemical reactions wherein the ionic liquid is composed of at least one species of cation and at least one species of anion, characterised in that a cation of the ionic liquid comprises a positively charge moiety and a basic moiety, and further wherein such ionic liquids may be used as promoters or catalysts for the chemical reactions.
Abstract:
The invention relates to racemic and especially non-racemic acyloins, the derivatives thereof, a method for the production thereof and the use of the same for producing epothilones and their derivatives. The invention especially relates to the production of acyloins in a non-racemic form by means of diastereomer separation or synthesis using auxiliary agents and by means of enzymatic resolution of racemates. The invention also relates to epothilone synthesis components, a method for the production thereof and the use of synthesis components for producing epothilones and their derivatives. An especially preferred compound comprises the following general formula.
Abstract:
The present invention relates to novel ketone compounds, compositions comprising ketone compounds, and methods useful for treating and preventing cardiovascular diseases, dyslipidemias, dysproteinemias, and glucose metabolism disorders comprising administering a composition comprising a ketone compound. The compounds, compositions, and methods of the invention are also useful for treating and preventing Alzheimer's Disease, Syndrome X, peroxisome proliferator activated receptor-related disorders, septicemia, thrombotic disorders, obesity, pancreatitis, hypertension, renal disease, cancer, inflammation, and impotence. In certain embodiments, the compounds, compositions, and methods of the invention are useful in combination therapy with other therapeutics, such as hypocholesterolemic and hypoglycemic agents.