Metal oxide-supported earth-abundant metal catalysts for highly efficient organic transformations
AssigneeThe University of Chicago
InventorsWenbin Lin, Kuntal Manna, Pengfei Ji, Takahiro Sawano, Zekai Lin
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Abstract
Surface hydroxyl groups on porous and nonporous metal oxides, such as silica gel and alumina, were metalated with catalyst precursors, such as complexes of earth abundant metals (e.g., Fe, Co, Cr, Ni, Cu, Mn and Mg). The metalated metal oxide catalysts provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of organic transformations. The catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.
Claims20
A method for preparing a catalyst, comprising:
- (a) providing a metal oxide comprising surface OH groups;
- and
- (b) reacting the metal oxide with a catalyst precursor, wherein the catalyst precursor is a compound of the formula MLnX, wherein n is an integer from 0 to 5;
- X is H, alkyl, aralkyl, aryl, or halo;
- M is a catalytically active metal, and each L is independently selected from the group consisting of H, halo, alkyl, aralkyl, aryl, heteroaryl, alkoxyl, and amine, thereby forming a catalyst comprising a —O-M-Lx group, wherein x is an integer from 0 to 5.
A composition comprising a metal oxide, wherein one or more metal or metalloid atom M′ of the metal oxide is bonded to a group of the formula —O-M-Lx, wherein x is an integer from 0 to 5, M is a catalytically active metal, and each L is independently selected from the group consisting of H, halo, alkyl, aralkyl, aryl, heteroaryl, alkoxy, and amine.
A method for preparing a compound comprising contacting a substrate capable of forming a product by catalytic transformation with a catalyst comprising a metal functionalized metal oxide, optionally wherein the metal functionalized metal oxide comprises a composition comprising a metal oxide wherein one or more metal or metalloid atom M′ of the metal oxide is bonded to a group of the formula —O-M-Lx, wherein x is an integer from 0 to 5, M is a catalytically active metal, and each L is independently selected from the group consisting of H, halo, alkyl, aralkyl, aryl, heteroaryl, alkoxy, and amine, or wherein the metal functionalized metal oxide comprises a catalyst prepared by a method comprising:
- (a) providing a metal oxide comprising surface OH groups;
- and (b) reacting the metal oxide with a catalyst precursor, wherein the catalyst precursor is a compound of the formula MLnX, wherein n is an integer from 0 to 5;
- X is H, alkyl, aralkyl, aryl, or halo;
- M is a catalytically active metal, and each L is independently selected from the group consisting of H, halo, alkyl, aralkyl, aryl, heteroaryl, alkoxyl, and amine, thereby forming a catalyst comprising a —O-M-Lx group, wherein x is an integer from 0 to 5.
Dependencies are inferred from the claim text.