摘要:
1. A PROCESS FOR THE ASYMMETRIC HYDROGENATION OF AN OLEFIN WHICH COMPRISES THE HYDROGENATION OF AN OLEFIN OF THE FORMULA
R1-C(-R2)=C(-R3)-R4
WHEREIN R1, R2, R3 AND R4 ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF HYDROGEN; ALKYL HAVING AT LEAST ONE AND A MACIMUM OF 12 CARBON ATOMS; SUBSTITUTED ALKYL SAID SUBSTITUTION BEING SELECTED FROM THE GROUP CONSISTING OF AMINO, HYDROXY, NITRO, THIO, CARBONYL, CARBOXYL, CARBOXYLIC ESTER, SAID ESTER GROUP HAVING A MAXIMUM OF 6 CARBON ATOMS; PHENYL; SUBSTITUTED PHENYL, SAID SUBSTITUTION BEING SELECTED FROM THE GROUP CONSISTING OF ALKYL HAVING A MAXIMUM OF 4 CARBON ATOMS, AMINO, CARBOXYL, NITRO AND CARBOXYLIC ESTER, SAID ESTER HAVING A MAXIMUM OF 4 CARBON ATOMS, AND SAID SUBSTITUTION BEING LESS THAN 3 SUBSTITUTENTS; AMINO; DIBENZYLAMINO; BENZYLAMINO; NITRO; CARBOXYL AND CARBOXYLIC ESTER, SAID ESTER HAVING A MAXIMUM OF 4 CARBON ATOMS, PROVIDED THAT, UPON HYDROGENATION, (A) THE OLEFIN IS CAPABLE OF FORMING A RACEMIC MIXTURE, AND (B) AT LEAST ONE OF THE CARBON ATOMS UNITED BY THE OLEFINIC BOND IS CAPABLE OF FORMING AN ASYMMETRIC CARBON, IN THE PRESENCE OF A CATALYST REPRESENTED BY THE FORMULA
M1XNL3
WHEREIN M1 IS A METAL SELECTED FROM THE GROUP CONSISTING OF RHODIUM, RUTHENIUM AND IRIDIUM; X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, CHLORINE, FLUORINE, BROMINE AND IODINE; EACH L IS INDEPENDENTLY SELECTED FROM THE GROUP AR5R6R7, WHEREIN A IS SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS AND ARSENIC AND R5, R6 AND R7 ARE EACH INDEPENDENTLY SELECTED FROM THE GROUP CONSISTING OF HYDROGEN; ALKYL HAVING AT LEAST ONE CARBON ATOM AND A MAXIMUM OF 12 CARBON ATOMS; SUBSTITUTED ALLKYL, SAID SUBSTITUTION SELECTED FROM THE GROUP CONSISTING OF AMINO, CARBONYL, PHENYL, NITRO AND ALKOXY, SAID ALKOXY HAVING A MAXIMUM OF 4 CARBON ATOMS; PHENYL; SUBSTITUTED PHENYL, SAID SUBSTITUTION SELECTED FROM THE GROUP CONSISTING OF ALKYL HAVING A MAXIMUM OF 4 CARBON ATOMS, AMINO AND NITRO, SAID SUBSTITUTION BEING LESS THAN 3 SUBSTITUENTS; CYCLOALKYL HAVING AT LEAST 3 CARBON ATOMS AND A MAXIMUM OF 6 CARBON ATOMS; PYRRYL; THIENYL; FURYL; PYRIDYL AND PIPERIDYL, PROVIDED THAT AT LEAST ONE L GROUP IS OPTICALLY ACTIVE AND N IS ONE OF THE INTEGERS ONE OR THREE.
摘要:
ALKYLPHOSPHONOTHIOIC DICHLORIDE-ALUMINUM TRIHALIDE COMPLEXES, WHICH CAN BE PRODUCED BY REACTING THIOPHOSPHORYL HALIDE WITH AN ALKYL ALUMINUM SESQUIHALIDE OR TRIALKYL ALUMINUM, CATALYZE THE FORMATION OF THIOPHOSPHORYL HALIDE FROM SULFUR AND PHOSPHORUS TRIHALIDE.
摘要:
Disclosed are nickel-containing complexation precursors having high complexation activity for bidentate processed under various conditions phosphite ligands. Also disclosed are methods of making the complexation precursors. The disclosed method of generating the nickel-containing complexation precursor includes including contacting a nickel starting material with a reductant under conditions sufficient to generate a nickel-containing complexation precursor having at least about 1,500 ppmw sulfur in the form of sulfide.
摘要:
A process for the synthesis of a cationic rhodium complex comprises the steps of: (a) forming a mixture of a rhodium-diolefin-1,3-diketonate compound and a phosphorus ligand in a ketone solvent, (b) mixing an acid with the mixture to form a solution of the cationic rhodium complex, (c) evaporating at least a portion of the solvent from the solution, (d) optionally, treating the resulting complex with an ether, and (e) treating the resulting complex with an alcohol. The complex may be recovered and used as a catalyst, for example in hydrogenation reactions.
摘要:
A novel nickel particulate form is provided that efficiently forms a zero-valent nickel complex with a phosphorus-containing ligands in an organic liquid to form a hydrocyanation catalyst. Particles in the nickel particulate form comprise nickel crystallites. For example, the nickel particulate form can have a BET Specific Surface Area of at least about 1 m2/gm; an average crystallite size less than about 20-25 nm, the nickel particulate form can have at least 10% of the crystallites in the nickel form can have can have a diameter (C10) of less than about 10 nm, and/or there are on average at least about 1015 surface crystallites per gram nickel. A ratio of BET SSA to C50 for the nickel particulate form can be at least about 0.1×109 m/gm and preferably at least about 0.4×109 m/gm. Methods of preparation and use are also provided.
摘要:
The present invention relates to a process for producing compounds comprising at least one nitrile function by hydrocyanation of a compound comprising at least one non-conjugated unsaturation.The invention proposes a process for producing compounds comprising at least one nitrile function by hydrocyanation of an organic compound comprising at least one non-conjugated unsaturation, comprising from 2 to 20 carbon atoms, by reaction with hydrogen cyanide in the presence of a catalytic system comprising a complex of nickel having the oxidation state of zero with at least one organophosphorus ligand chosen from the group comprising organophosphites, organophosphonites, organophosphinites and organosphosphines and a cocatalyst of the Lewis acid type.
摘要:
The invention describes a nickel-based composition. The invention also concerns the use of said composition as a catalytic composition in an olefin oligomerization process.
摘要:
A composition comprising a supported hydrogenation catalyst comprising palladium and an organophosphorous compound, the supported hydrogenation catalyst being capable of selectively hydrogenating highly unsaturated hydrocarbons to unsaturated hydrocarbons. A method of making a selective hydrogenation catalyst comprising contacting a support with a palladium-containing compound to form a palladium supported composition, contacting the palladium supported composition with an organophosphorus compound to form a catalyst precursor, and reducing the catalyst precursor to form the catalyst. A method of selectively hydrogenating highly unsaturated hydrocarbons to an unsaturated hydrocarbon enriched composition comprising contacting a supported catalyst comprising palladium and an organophosphorous compound with a feed comprising highly unsaturated hydrocarbon under conditions suitable for hydrogenating at least a portion of the highly unsaturated hydrocarbon feed to form the unsaturated hydrocarbon enriched composition.