Abstract: Process for the hydroformylation of olefins using a cobalt precatalyst and a diphosphine ligand.

Abstract: The present invention relates to the field of perfumery. More particularly, it concerns valuable new chemical intermediates for producing perfuming ingredients. Moreover, the present invention comprises also a process for producing compound of formula (I).

Abstract: Process for the hydroformylation of olefins using a cobalt precatalyst and a diphosphine ligand.

Abstract: Bisphosphite ligands based on benzopinacol with an open outer unit, and the use thereof in hydroformylation.

Abstract: New diphosphites based on cis-butene-1,4-diol.

Abstract: Process for the hydroformylation of olefins using a cobalt pre-catalyst.

Abstract: Process for the hydroformylation of olefins using a cobalt pre-catalyst.

Abstract: Bisphosphite ligands based on benzopinacol and 1,3-propanediol, and the use thereof in hydroformylation.

Abstract: New diphosphites based on cis-butene-1,4-diol.

Abstract: 6,6?-([1,1?-Biphenyl]-2,3?,-diylbis)oxy))didibenzo[d,f][1,3,2]dioxaphosphepines and the use thereof in hydroformylation.

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: A catalytic method for hydroformylating cyclooctadiene substrate involving forming a reaction mixture that includes the cyclooctadiene and a precursor of or a transitional metal ligand complex where the ligand has structure (1): (1) H2 and CO are fed into the reaction mixture and the mixture is heated to convert the cyclooctadiene into an aldehyde. A preferred ligand is 4-([1,1?:3?,1?-terphenyl]-2?-yloxy)-S-dinaphtho[2,1-d:1?,2?-f][1,3,2]dioxaphosphepine.

Abstract: A catalytic method for hydroformylating a cyclooctadiene substrate involving forming a reaction mixture that includes the cyclooctadiene and a precursor of or a transitional metal ligand complex where the ligand has structure (1): H2 and CO are fed into the reaction mixture and the mixture is heated to convert the cyclooctadiene into an aldehyde. A preferred ligand is 2-(anthracen-9-yloxy)-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane.

Abstract: Novel heterocyclic selenamonophosphites protected on the hydroxyl group, processes for preparation thereof and the use thereof as ligand.

Abstract: Process comprising the process steps of: a) initially charging a pentenoic ester, b) adding a ligand of structure 1 or 2: and a compound comprising a metal atom selected from: Rh, Ru, Co, Ir, c) supplying H2 and CO, d) heating the reaction mixture to convert the pentenoic ester to 5-formylpentanoic esters.

Abstract: Method for hydroformylating cyclooctadiene using 4-([1,1?:3?,1?-terphenyl]-2?-yloxy)-S-dinaphtho[2,1-d:1?,2?-f][1,3,2]dioxaphosphepine.

Abstract: Method for hydroformylating cyclooctadiene using 2-(anthracen-9-yloxy)-4,4,5,5-tetramethyl-1,3,2-dioxaphospholane.

Abstract: Novel heterocyclic selenabisphosphites, process for preparation thereof and use thereof as ligand unit for preparing ligands for use in complexes.