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AssigneeJapan Science and Technology Agency
InventorsShu Kobayashi, Ryo Akiyama, Nobuyuki Kawai, Masahiro Takeuchi
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The objective is to incarcerate a Lewis acid metal in a polymer and to make this catalyst recoverable while maintaining its function as a Lewis acid metal catalyst. The present invention is a polymer-incarcerated Lewis acid metal catalyst in which a Lewis acid metal is incarcerated in a crosslinked polymer and the crosslinked polymer is crosslinked using the crosslinking groups contained in a crosslinkable polymer. The polymer incarcerated Lewis acid metal catalyst is characterized by the crosslinkable polymer containing at least one type of monomer unit containing hydrophobic substituents and hydrophilic substituents containing crosslinking groups, and the hydrophobic substituents contain aromatic substituents. This crosslinkable polymer preferably comprises at least one type of monomer unit containing hydrophobic substituents and hydrophilic substituents containing crosslinking groups and a monomer unit containing hydrophobic substituents. This catalyst can be obtained by subjecting a polymer micelle incarcerated Lewis acid metal obtained by mixing an organic solution containing a crosslinkable polymer and a Lewis acid metal with a bad solvent to a crosslinking reaction. This catalyst is useful as a catalyst in aldol reactions, cyanolation reactions, allylation reactions, Michael reactions, Mannich reactions, Diels Alder reactions and Friedel Crafts reactions.
A polymer incarcerated Lewis acid metal catalyst comprising a Lewis acid metal and a crosslinked polymer, wherein the Lewis acid metal is incarcerated in the crosslinked polymer, the crosslinked polymer is obtained by crosslinking crosslinking groups contained in a crosslinkable polymer, the crosslinkable polymer contains at least one type of monomer unit having a hydrophobic substituent and a hydrophilic substituent having the crosslinking group, and the hydrophobic substituent contains an aromatic substituent.
Dependencies are inferred from the claim text.