Polymer-supported Lewis acid catalyst
AssigneeJapan Science and Technology Corporation
InventorShu Kobayashi
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Abstract
In order to provide a novel Lewis acid catalyst, which shows high reaction activity in aqueous medium, is easily recovered, and is excellent in reusability, a Lewis acid group expressed by the general formula (I): MXn (I) (wherein M represents a polyvalent element, X represents an anionic group, and n is an integer representing the valence of M) is linked and supported on a polymer membrane via an SO3 or SO4 group.
Claims7
The polymer-supported Lewis acid catalyst comprising a Lewis acid group expressed by the following general formula (II):
- —R0-MXn-1 (II)
- wherein M represents a lanthanoid element, X represents an anionic group, n is an integer representing the valence of M, and R0 represents a SO3 or SO4 group, said Lewis acid group being bonded to a polymeric chain via a spacer chain, wherein the spacer chain is a hydrocarbon group.
A polymer-supported Lewis acid catalyst comprising a Lewis acid group expressed by the following general formula (II):
- —R0-MXn-1 (II)
- wherein M represents a lanthanoid element, X represents an anionic group, n is an integer representing the valence of M, and R0 represents a SO3 or SO4 group, said Lewis acid group being bonded to a polymeric chain via a spacer chain,
- wherein the spacer chain is expressed by the following general formula (III):
- [(CH2)mPh]l (III)
- wherein Ph represents a phenyl group, and m and l each represent an integer greater than or equal to 1.
Dependencies are inferred from the claim text.