摘要:
A method of manufacturing ruthenium carbene complexes and novel aryl alkylidene ruthenium complexes based on the method, the complexes able to used as catalysts in metathesis reactions.
摘要:
Non-C2-symmetric bisphospholane ligands and methods for their preparation are described. Use of metal/non-C2-symmetric bisphospholane complexes to catalyze asymmetric transformation reactions to provide high enantiomeric excesses of formed compounds is also described.
摘要:
Process for the carbonylation of a conjugated diene by reacting the conjugated diene with carbon monoxide and an hydroxyl group containing compound in the presence of a catalyst system based on: (a) a source of palladium cations, (b) a diphosphine ligand, and (c) a source of anions, wherein the diphosphine ligand is a ligand having the general formula I wherein x1 and x2 represent a cyclic group with at least 5 ring atoms, of which one is a phosphorus atom, and R represents a bivalent aliphatic bridging group, connecting both phosphorus atoms, containing from 2 to 4 atoms inthe bridge, which is substituted with at least one substituent orR represents a phenyl group with both phosphorus groups bound to the 1,2-position.
摘要:
Non-C2-symmetric bisphospholane ligands and methods for their preparation are described. Use of metal/non-C2-symmetric bisphospholane complexes to catalyze asymmetric transformation reactions to provide high enantiomeric excesses of formed compounds is also described.
摘要:
Process for the carbonylation of optionally substituted ethylenically unsaturated compounds by reaction with carbon monoxide and a coreactant in the presence of a catalyst system. The catalyst system includes (a) a source of Pt group metal cations, (b) a certain bidentate diphosphine composition.
摘要:
The invention provides a process for an improved oxirane hydroformylation catalyst, the improved oxirane hydroformylation catalyst, and a one step process for preparing a 1,3-diol in the presence of such a catalyst. One process for preparing the hydroformylation catalyst involves: a) forming a complex (A) by contacting a ruthenium(0) compound with a ditertiary phosphine ligand; and b) forming a complex (B) by subjecting complex (A) to a redox reaction with a cobalt(0) carbonyl compound. This catalyst is used in a one step hydroformylation process for preparing a 1,3-diol, comprising the reaction of an oxirane with syngas at hydroformylation conditions in an inert solvent in the presence of the above hydroformylation catalyst where recovery of product is preferably accomplished via phase separation of a diol rich phase from the bulk reaction liquor.
摘要:
The first embodiment of the present invention provides a process, which includes: in a continuous process in a membrane reactor, asymmetrically hydrogenating at least one CnullC, CnullN or CnullO double bond with a catalyst. Another embodiment of the present invention provides a ligand, which includes at least one di-1,3-aminophosphine homochiral active center; optionally, a linker; and a molecular weight-enlarging polymer; wherein the active center is bound to the molecular weight-enlarging polymer through the linker or is bound directly to the molecular weight-enlarging polymer; and wherein the linker is defined in the claims. Another embodiment of the present invention provides a process for preparing the above-noted ligand, and a catalyst that includes the above-noted ligand.
摘要:
Compounds of formula III, 1 wherein R6 und R7 signify identical or different secondary phosphino; R8 is nullCH2nullOH, nullCH2nullNH2, nullCH2nullOnullBnullFU, nullCH2nullNH2nullBnullFU, or nullOnullBnullFU; R9 has the same significance as R8 or is C1-C4-alkyl or C1-C4-alkoxy; or R8 and R9 together signify HOCH(CH2nullOnull)2, H2NCHnull(CH2nullOnull)2, FUnullBnullOCH(CH2nullOnull)2 or FU-B-HNCH(CH2nullOnull)2; B is a bridging group; and FU is a functional group. The compounds may be bonded to inorganic or organic carriers. Their d-8 metal complexes are valuable catalysts for the enantioselective hydrogenation of prochiral organic compounds with carbon multiple bonds or carbon/hetero atom multiple bonds.
摘要:
Compounds of formulae I: (DIP)IrX.sub.q Y.sub.r (Z), Ia: (DIP)IrX.sub.s Y.sub.t (Z).sub.2 and Ib: (DIP)Ir(Z).sub.3 or mixtures of at least two of those compounds, wherein DIP is a ditertiary diphosphine, the two phosphine groups of which are bonded to a C.sub.2 -, C.sub.3 - or C.sub.4 -carbon chain, with the result that the diphosphine forms a 5- to 7-membered ring together with the Ir atom, X is Cl, Br or I, Y is a hydrogen atom, q and r are 0, 1 or 2 and the sum of q+r is 2, s and t are 0 or 1 and the sum of s+t is 1, and Z is the anion of an organic oxy acid that contains a group C(.dbd.O), S(.dbd.O)O or P(.dbd.O)O in the anion. The compounds are excellent catalysts for the hydrogenation of imines, especially for the enantioselective hydrogenation of prochiral imines.
摘要:
NOVEL COMPOSITIONS OF MATTER AS COMPLEX COBALT CARBONYL COMPOUNDS ARE PREPARED BY CONTACTING TRIVALENT HALIDE SALTS OF GROUP V METALS WITH ALKALI OR ALKALINE EARTH METAL COBALT CARBONYL COMPOUNDS UNDER MODERATE TEMPERATURE AND PRESSURE CONDITIONS AND IN THE PRESENCE OF A SOLVENT AND THE SUBSTANTIAL ABSENCE OF OXYGEN. THE INVENTION ALSO INCLUDES THE REACTION OF THE COBALT CARBONYL COMPOUNDS WITH BIPHYLLIC LIGNAND MATERIALS TO FORM COMPLEX COBALT CARBONYL LIGAND COMPOSITIONS. THESE NOVEL COMPOSITIONS OF MATTER ARE USEFUL AS CATALYSTS FOR THE REACTION OF CARBON MONOXIDE TOGETHER WITH OTHER COREACTING SUBSTRATE CONTAINING A WIDE RANGE OF ORGANIC MOLECULES SUCH AS OLEFINS, DI- AND POLYOLEFINS, AROMATICS, ALCOHOLS, AMINES, ALKYL AND ARYL HALIDES, OLEFIN OXIDES, NITRILES, ETC.