Method for producing a supported catalyst

Abstract of WO9903581 The invention relates to a method for producing supported catalysts by impregnating or imbibing SiO2-based crystalline or amorphous support material with a pore diameter of 20 to 250 ANGSTROM with silasesquioxane metal complexes. Said supported catalysts are suitable for oxidising or epoxidising unsaturated hydrocarbons or alcohols

Catalyst system based on polymer compounds comprising silasesquioxane-metal complexes

Catalyst systems based on a polymer compound having a molecular weight Mn of greater than 1000 g/mol, and comprising at least one silasesquioxane-metal complex, especially useful for the oxidation and oximation of organic compounds using peroxides; processes for preparation of such catalytic systems; and processes for use of such catalytic systems

Oligomeric silasesquioxanes and a process for preparing oligomeric silasesquioxanes

Oligomeric silasesquioxanes having the formula R6Si6O9 wherein R is alkyl, cycloalkyl other than cyclohexyl, alkenyl, cycloalkenyl, alkynyl, cycloalkynyl, aryl, and/or heteroaryl, and the structure I; processes for preparing oligomeric silasesquioxanes of formula R6Si6O9 wherein R is alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkynyl, aryl, and/or heteroaryl; processes of using such oligomeric silasesquioxanes; and products obtained thereby

Advances in homogeneous and heterogeneous catalysis with metal-containing silsesquioxanes

Metal-containing silsesquioxane derivatives provide new catalysts with both homogeneous and heterogeneous applicability. The steric and electronic properties of silsesquioxane silanolate ligands render metal centers more Lewis acidic than conventional alkoxide or siloxide ligands do. This concept has been exploited in newly developed catalysts for alkene metathesis, polymerization, epoxidation, and Diels-Alder reactions of enones. Other applications are envisioned in the near future

Advances in homogeneous and heterogeneous catalysis with metal-containing silsesquioxanes

Metal-containing silsesquioxane derivatives provide new catalysts with both homogeneous and heterogeneous applicability. The steric and electronic properties of silsesquioxane silanolate ligands render metal centers more Lewis acidic than conventional alkoxide or siloxide ligands do. This concept has been exploited in newly developed catalysts for alkene metathesis, polymerization, epoxidation, and Diels-Alder reactions of enones. Other applications are envisioned in the near future

Epoxidation catalysis with designed MCM-41 materials

No abstract availabl

From 'Nature' to an adventure in single-site epoxidation catalysis

No abstract

Procedures for preparation and use of oligomeric silsesquioxanes

The invention concerns a procedure for prodn. of completely condensed oligomeric silasesquioxanes, I (R = (un)substituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkynyl, aryl, heteroaryl; etc.), and their use as catalysts as well as for the synthesis and modification of polymers. [on SciFinder (R)

Method for producing functionalized oligomeric silsesquioxanes and the use of the same

The invention relates to a method for producing functionalized oligomeric silsesquioxanes by reacting partially condensed oligomeric silsesquioxanes with alkoxysilanes. Thus, reaction of (isobutyl)7Si7O9(OH)3 with 3-chloropropyltrimethoxysilane, vinyltrimethoxysilane, 3-aminopropyltriethoxysilane, N-[3-(trimethoxysilyl)propyl]ethylenediamine, etc. in the presence of Et4NOH in THF/H2O gave title compds. I (R = iso-Bu, R1 = CH2CH2CH2Cl, CH2:CH, CH2CH2CH2NH2, CH2CH2CH2NHCH2CH2NH2, etc.). The invention also relates to the use of the same for further derivatizations, for the synthesis of catalysts and the starting compds. thereof, and for the synthesis and modification of polymers. [on SciFinder (R)