申请人:Japan Science and Technology Agency
公开号:EP1738824A1
公开(公告)日:2007-01-03
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.
目的是将路易斯酸金属囚禁在聚合物中,并使这种催化剂可回收,同时保持其作为路易斯酸金属催化剂的功能。
本发明是一种聚合物螯合路易斯酸金属催化剂,其中路易斯酸金属被螯合在交联聚合物中,交联聚合物利用可交联聚合物中所含的交联基团进行交联。囚禁路易斯酸金属催化剂的聚合物的特点是可交联聚合物含有至少一种单体单元,单体单元含有疏水取代基和含有交联基团的亲水取代基,疏水取代基含有芳香取代基。这种可交联聚合物最好包含至少一种含有疏水取代基和含有交联基团的亲水取代基的单体单元,以及一种含有疏水取代基的单体单元。将含有可交联聚合物和路易斯酸金属的有机溶液与劣质溶剂混合,使聚合物胶束与路易斯酸金属发生交联反应,即可获得这种催化剂。这种催化剂可用作醛醇反应、氰化反应、烯丙基化反应、迈克尔反应、曼尼希反应、Diels Alder 反应和 Friedel Crafts 反应的催化剂。