Zeolite-palladium complex, method for producing the same, catalyst containing the complex, and method for producing a coupling compound by using the catalyst
AssigneeNational University Corporation Tottori University
InventorsKazu Okumura, Miki Niwa, Hirosuke Matsui, Yoshinori Enmi, Takuya Tomiyama, Shizuyo Okuda
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Abstract
There is provided a substance having much higher catalytic activity for a Suzuki-Miyaura coupling reaction than conventional heterogenous catalysts. The present invention provides a zeolite-palladium complex including USY-zeolite and Pd supported on the USY-zeolite, the Pd having a Pd—Pd coordination number of 4 or less and an oxidation number of 0.5 or less.
Claims15
A zeolite-palladium complex, comprising USY-zeolite and Pd supported on the USY-zeolite, the Pd having a Pd—Pd coordination number of 4 or less and an oxidation number of 0.5 or less.
H—USY-zeolite, comprising strong acid sites, wherein an amount of the strong acid sites having ΔH of 130 to 145 kJ/mol is 0.12 mol/kg or more.
NH4+-containing USY-zeolite, wherein an amount of the NH4+ is between 0.15 and 1.3 mol/kg.
A method for producing a zeolite-palladium complex, comprising the step of carrying out H2 bubbling over a zeolite-palladium complex precursor, as obtained by mixing NH4+-containing USY-zeolite with a palladium ammonium salt, in a solvent containing at least one of xylene and toluene at a temperature between 20° C. and 170° C. under an H2 partial pressure of 1 to 30%.
A method for producing a Suzuki-Miyaura coupling compound, comprising the steps of:
- producing a zeolite-palladium complex by carrying out H2 bubbling over a zeolite-palladium complex precursor, as obtained by mixing NH4+-containing USY-zeolite with a palladium ammonium salt, in a solvent containing at least one of xylene and toluene at a temperature between 20° C. and 170° C. under an H2 partial pressure of 1 to 30% in the presence of reactants of a Suzuki-Miyaura coupling reaction;
- and
- simultaneously subjecting the reactants to the coupling reaction.
Dependencies are inferred from the claim text.