New ruthenium- and osmium-carbene-complex catalysts, which are bonded with chiral carbon atoms or over double bonds at a catalyst base skeleton, useful e.g. in metathesis-reactions, preferably in ring closing metathesis reactions

Ruthenium- and osmium-carbene-complex catalysts (I), which are bonded with chiral carbon atoms or over one or more double bonds at a catalyst base skeleton, are new. Ruthenium- and osmium-carbene-complex catalysts of formula (I), which are bonded with chiral carbon atoms or over one or more double bonds at a catalyst base skeleton, is new. Either R 1>-R 8> : alkyl, cycloalkyl, alkenyl, alkynyl, aryl, carboxylate, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkoxycarbonyl, alkyl amino, alkylthio, arylthio, alkylsulfonyl, alkylsulfinyl, dialkylamino, alkylsilyl or alkoxysilyl (all optionally substituted by one or more alkyl, halo, alkoxy or (hetero)aryl), H, halo, OH, aldehyde, keto, thiol, CF 3, NO 2, nitroso, CN, thiocyano, isocyanato, carbodiimide, carbamate, thiocarbamate, dithiocarbamate, amino, amido, imino, silyl, SO 3 ->, OSO 3 ->, PO 3 ->or OPO 3 ->; or CR 1>R 8> : cyclic group, preferably aromatic system, where R 8>is bridged with other ligand of (I); m : 0-1; A : O, S, C(R 9>R 10> ...

USE OF CATALYSTS FOR THE METATHESEABBAU OF NITRILE RUBBER

Catalysts for metathesis reactions

Catalysts for metathesis reactions, in particular for the metathesis of nitrile rubber, are provided.

USE OF CATALYST FOR DEGRADATION OF NITRILE RUBBER BY METATHESIS

PROBLEM TO BE SOLVED: To provide use of a catalyst for degradation of a nitrile rubber by metathesis. SOLUTION: The new method for the degradation of the nitrile rubber by the metathesis uses a ruthenium- or osmium-based catalyst having both of a substituted or nonsubstituted imidazolidine ligand and a carbene ligand having a phosphonium group. COPYRIGHT: (C)2007,JPO&INPIT ...

Use of catalysts for the degradation of nitrile rubber by metathesis

A novel process for the degradation of nitrile rubber by metathesis using ruthenium- or osmium-based catalysts which have both a substituted or unsubstituted imidazolidine ligand and a carbene ligand bearing a phosphonium radical is provided.

New ruthenium- and osmium-carbene-complex catalysts, which are bonded with chiral carbon atoms or over double bonds at a catalyst base skeleton, useful e.g. in metathesis-reactions, preferably in ring closing metathesis reactions

Ruthenium- and osmium-carbene-complex catalysts (I), which are bonded with chiral carbon atoms or over one or more double bonds at a catalyst base skeleton, are new. Ruthenium- and osmium-carbene-complex catalysts of formula (I), which are bonded with chiral carbon atoms or over one or more double bonds at a catalyst base skeleton, is new. Either R 1>-R 8> : alkyl, cycloalkyl, alkenyl, alkynyl, aryl, carboxylate, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkoxycarbonyl, alkyl amino, alkylthio, arylthio, alkylsulfonyl, alkylsulfinyl, dialkylamino, alkylsilyl or alkoxysilyl (all optionally substituted by one or more alkyl, halo, alkoxy or (hetero)aryl), H, halo, OH, aldehyde, keto, thiol, CF 3, NO 2, nitroso, CN, thiocyano, isocyanato, carbodiimide, carbamate, thiocarbamate, dithiocarbamate, amino, amido, imino, silyl, SO 3 ->, OSO 3 ->, PO 3 ->or OPO 3 ->; or CR 1>R 8> : cyclic group, preferably aromatic system, where R 8>is bridged with other ligand of (I); m : 0-1; A : O, S, C(R 9>R 10> ...

Degradation of nitrile rubbers by metathesis involves subjecting the rubber to a metathesis reaction in presence of a ruthenium- or osmium-based catalyst containing imidazolidine ligand and carbene ligand containing phosphonium radical

Degradation of nitrile rubbers by metathesis involves: subjecting the nitrile rubber to a metathesis reaction in the presence of a ruthenium- or osmium-based catalyst containing an imidazolidine ligand and a carbene ligand containing a phosphonium radical. Degradation of nitrile rubbers by metathesis involves: subjecting the nitrile rubber to a metathesis reaction in the presence of a catalyst of formula (I). M : ruthenium or osmium; X 1 and X 2anionic ligands; R 1-R 3organic radicals; Im : optionally substituted imidazolidine radical; A : an anion. [Image].

METHOD FOR DEGRADING NITRILE RUBBER BY METATHESIS USING RUTHENIUM- OR OSMIUM-BASED CATALYST, AND USE OF CATALYST FOR DEGRADING NITRILE RUBBER

PURPOSE: Provided is a method for degrading nitrile rubbers by metathesis, which is carried out by using a proper catalyst, hardly causes gelation, and exhibits improved storage stability of the catalyst in a solution. CONSTITUTION: The method for degrading nitrile rubbers by metathesis consists of subjecting nitrile rubbers to metathesis in the presence of a catalyst represented by the following formula(I). In the formula, M is ruthenium or osmium, X^1 and X^2 are identical to or different from each other and each is an anionic ligand, R^1, R^2, and R^3 are identical to or different from another and each is an organic radical, Im is a substituted or unsubstituted imidazolidine radical, and A is an anion. © KIPO 2007 ...

Use of catalysts for the degradation of nitrile rubber by metathesis

Catalysts for metathesis reactions

The invention relates to a transition metal carbene complex catalyst, preparation thereof and application in catalysis double decomposition reaction, particularly in double decomposition of nitrile rubber.

Method for the degradation of nitrile rubber by metathesis in the presence of ruthenium- or osmium-based catalysts

A novel process for the degradation of nitrile rubber by metathesis using ruthenium- or osmium-based catalysts which have both a substituted or unsubstituted imidazolidine ligand and a carbene ligand bearing a phosphonium radical is provided.

Method for the degradation of nitrile rubber by metathesis in the presence of ruthenium- or osmium-based catalysts

A novel process for the degradation of nitrile rubber by metathesis using ruthenium- or osmium-based catalysts which have both a substituted or unsubstituted imidazolidine ligand and a carbene ligand bearing a phosphonium radical is provided.

CATALYST FOR METATHESIS REACTION

PROBLEM TO BE SOLVED: To provide transition metal-carbene complex catalysts, their preparing methods and catalysts for a metathesis reaction. SOLUTION: The new transition metal-carbene complex catalyst for the metathesis reaction, particularly, for metathesis of nitrile rubber can be synthesized by applying specific reaction parameters. COPYRIGHT: (C)2009,JPO&INPIT ...

Catalysts for metathesis reactions.

Se preparan nuevos catalizadores para reacciones de metátesis, de forma particular para la metátesis de caucho nitrilo.

ruthenium carbene and osmium carbene complex catalysts, catalysts, process for producing ruthenium carbene or osmium carbene catalysts, process for producing catalysts and their use

CATALISADORES COMPLEXOS RUTêNIO-CARBENO E óSMIO-CARBENO, CATALISADORES, PROCESSO PARA PRODUçãO DE CATALISADORES DE RUTêNIO-CARBENO OU óSMIO-CARBENO, PROCESSO PARA PRODUçãO DE CATALISADORES E USO DOS MESMOS. São fornecidos novos catalisadores para reações de metátese, em especial para a metátese da borracha nitrílica. Ruthenium-carbene and osmium-carbene catalysts, catalysts, process for the production of ruthenium-carbene or osmium-carbine catalysts, process for the production of catalysts and the same. New catalysts for metathesis reactions are provided, in particular for nitrile rubber metathesis.

Catalysts for metathesis reactions

Verwendung von katalysatoren für den metatheseabbau von nitrilkautschuk