The present invention relates to ligands based on calixarenes, metal complexes comprising such ligands and their use as homogeneous or heterogeneous catalysts.

The present invention provides a method of efficiently producing an optically active 6-(3-aminopiperidin-1-yl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidine derivative. The optically active piperidine-3-carboxamide or a derivative thereof, which is obtained by subjecting 1,4,5,6-tetrahydropyridine-3-carboxamide or a derivative thereof to an asymmetric reduction in the presence of a catalyst, is used as an intermediate.

The invention relates to Rh, Ru, Co and Ir complexes comprising bidentate diphosphoramidites as ligands and to the use thereof as catalysts for the hydroformylation of olefins. The invention also relates to a process for preparing an aldehyde from an olefin using the complexes or ligands mentioned.

The present invention relates to a process for the oligomerisation of ethylene which comprises contacting ethylene with a transition metal-permethylpentalene complex, and a transition metal compound utilized therein.

Novel compounds including trimeric copper catalysts and intermediates for making such compounds are presented along with methods for preparing and using those compounds.

A 4,4-divinylazoarylene-bridged diruthenium catalyst bearing two Ru(CO)(3-methoxypyridin-2-olate)(P.sup.iPr.sub.3).sub.2 moieties, its synthesis, and its use as a catalyst.

A 1,4-divinylphenylene-bridged diruthenium complex bearing two Ru(CO)(P.sup.iPr.sub.3).sub.2 moieties with 8-mercaptoquinolato co-ligand, its synthesis, and its use as a catalyst in organic processes.

A method synthesizes at least one 3-halopropyltrihalosilane compound. The method includes I) at least one unsaturated compound selected from the group consisting of allyl halide and methallyl halide; and II) at least one H-silane selected from the group consisting of trihalosilane, methyldihalosilane and dimethylhalosilane. The reaction of the at least one unsaturated compound and the at least one H-silane is carried out in the presence of: III) a Karstedt catalyst and IV) at least one cocatalyst according to formula (A). In formula (A), R.sup.1 is an aryl group; each R.sup.2 is independently an alkyl group; and n is 0 or 1. A catalyst composition suitable for mediating a hydrosilylation reaction. A reactive composition is produced from the reaction products.

The present invention provides a method of efficiently producing an optically active 6-(3-aminopiperidin-1-yl)-2,4-dioxo -1,2,3,4-tetrahydropyrimidine derivative. The optically active piperidine-3-carboxamide or a derivative thereof, which is obtained by subjecting 1,4,5,6-tetrahydropyridine -3-carboxamide or a derivative thereof to an asymmetric reduction in the presence of a catalyst, is used as an intermediate.

Metal-organic framework (MOFs) compositions based on chiral phosphine-, chiral oxazoline-, chiral pyridine-, and chiral diene-derived organic bridging ligands were synthesized and then post-synthetically metalated with metal precursors such as Ru and Rh complexes. The metal complexes could also be directly incorporated into the MOFs. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations, including the addition of arylboronic acids to ,-unsaturated ketones and alkimines, the hydrogenation of substituted alkene and carbonyl compounds, and cyclization reactions. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.