Abstract: The present invention relates to chiral compounds with two optically active phosphorus atoms, chiral transition metal catalysts which comprise these compounds as ligands, a process for preparing the P-chiral compounds and processes for asymmetric synthesis using the chiral transition metal catalysts. The present invention specifically relates to a process for preparing an optically active carbonyl compound by asymmetric hydrogenation of a prochiral ?,?-unsaturated carbonyl compound with hydrogen in the presence of an optically active transition metal catalyst according to the invention. Yet more specifically, the present invention relates to a process for the asymmetric hydrogenation of citral, and also a process for preparing optically active menthol.

Abstract: The present invention relates to chiral compounds with two optically active phosphorus atoms, chiral transition metal catalysts which comprise these compounds as ligands, a process for preparing the P-chiral compounds and processes for asymmetric synthesis using the chiral transition metal catalysts. The present invention specifically relates to a process for preparing an optically active carbonyl compound by asymmetric hydrogenation of a prochiral ?,?-unsaturated carbonyl compound with hydrogen in the presence of an optically active transition metal catalyst according to the invention. Yet more specifically, the present invention relates to a process for the asymmetric hydrogenation of citral, and also a process for preparing optically active menthol.

Abstract: Disclosed herein are compounds of formula (I): wherein: the groups R1, R2, R3, R4, R5, R6, R7, R8, R1?, R2?, R3?, R4?, R5?, R6?, R7?, R8?, R1?, R2?, R3?, R4?, R5?, R6?, R7?, R8? are defined herein; and at least one of the following conditions is satisfied: two radicals from at least one of the four following pairs of radicals are not the same radical: R1? and R8?, R2? and R7?, R3? and R6?, R4? and R5?, and two radicals from at least one of the four following pairs of radicals are not the same radical: R1? and R8?, R2? and R7?, R3? and R6?, R4? and R5?.

Abstract: Bisphosphites having at least one unsymmetric outer biphenol unit are useful for the hydroformylation of an olefin.

Abstract: Bisphosphites having at least one unsymmetric outer biphenol unit are useful for the hydroformylation of an olefin.

Abstract: Bisphosphites having an outer naphthyl-phenyl unit and a central 2,3?-biphenol unit and their preparation are described.

Abstract: Bisphosphites having a central 2,3?-biphenol unit are useful for catalyzing hydroformylation.

Abstract: Bisphosphites having an outer naphthyl-phenyl unit.

Abstract: Bisphosphites having a central 2,3?-biphenol unit are useful for catalyzing hydroformylation.

Abstract: Monophosphites comprising an anthrol are useful for catalyzing hydroformylation of an olefin to an aldehyde.

Abstract: Bisphosphites having an outer naphthyl-phenyl unit and a central 2,3?-biphenol unit and their preparation are described.

Abstract: Bisphosphites having at least one unsymmetric outer biphenol unit are useful for the hydroformylation of an olefin.

Abstract: Bisphosphites having an outer naphthyl-phenyl unit.

Abstract: The subject matter of the present invention is a plurality of products and the use thereof as a catalytically active composition in a method for producing aldehydes.

Abstract: The subject matter of the present invention is a plurality of products and the use thereof as a catalytically active composition in a method for producing aldehydes.

Abstract: A method for producing optically pure propane-1,2-diol, including the method steps: a. hydrogenation of lactides, metal-catalysed heterogenous catalysis being carried out in the presence of hydrogen, a crude product containing propane-1,2-diol being produced, and b. dynamic, kinetic racemate resolution, propane-1,2-diol of an optical purity in the range of ?99% e.e. being produced.

Abstract: The invention relates to a method for separating 1-butene from C4-containing hydrocarbon mixtures, comprising isobutene and 1-butene, by hydroformylation, wherein the catalytic system used is made of one of the transition metals of the group 8 to 10, preferably rhodium, and a bisphosphite ligand of the formula (I), where X is a divalent substituted or unsubstituted bisalkylene or bisarylene group having one or more heteroatom(s), Y is a divalent substituted or unsubstituted bisarylene or bisalkylene group having one or more heteroatom(s), Z is oxygen or NR9, and R1, R2, R3, R4 are identical or different, substituted or unsubstituted, linked, unlinked or condensed aryl or heteroaryl groups, and R9 is hydrogen or a substituted or unsubstituted alkyl or aryl group having one or more heteroatom(s), wherein the bisphosphite ligand of the formula (I) is used in an excess of a molar ratio of 100:1 to 1:1 to the transition metal, and that with a 1-butene conversion of more than 95% less than 5% of the present isobute

Abstract: The invention relates to a device and a method for the continuous reaction of a liquid and a second fluid, wherein the device comprises at least two jet loop reactors interconnected in parallel and common outer liquid recirculation.

Abstract: The present invention relates to a process for the production of statins, which are known as HMG-CoA reductase inhibitors. A few of the intermediate compounds for use in the process in accordance with the invention are novel compounds and the invention also relates to these novel intermediate compounds.

Abstract: The present invention relates to a process for preparing pyrimidine derivatives of the formula V, in particular as intermediates useful for preparing pyrimidine derivatives of a class that is effective at inhibiting the biosynthesis of cholesterol in humans, such as HMG-CoA reductase inhibitors, e.g. rosuvastatin.