Immobilized lewis acid catalysts coated with ionic liquids and use thereof

摘要

The invention provides a novel immobilized Lewis acid catalyst which exhibits high catalytic activity in an aqueous solution and which permits recovery and reuse or long-term continuous use. The invention relates to an immobilized Lewis acid catalyst comprising a solid substance and a Lewis acid supported on the surface of the solid substance by chemical bonding, wherein the surface of the solid substance and the peripheries of the Lewis acid are coated with an ionic liquid, more specifically, an immobilized Lewis acid catalyst comprising a solid substance such as silica gel or an organic polymer and a Lewis acid stable even in water which is supported on the surface of the solid substance by chemical bonding, wherein the surface of the solid substance and the peripheries of the Lewis acid are completely or partially coated with a hydrophobic ionic liquid; a process for the production of the catalyst; use thereof; and a process for the preparation of compounds with the catalyst.

主权项

1. An immobilized Lewis acid catalyst, comprising:
a Lewis acid supported on the surface of a solid substance by chemical bonding, and an ionic liquid comprising a cation and an anion, the ionic liquid coating the surface of the solid substance and the peripheries of the Lewis acid without being covalently-immobilized on the surface of the solid substance and the peripheries of the Lewis acid, wherein the Lewin acid is a rare earth metal of bismuth salt, and wherein the Lewin acid is chemically bound to a sulfonic acid group or sulfonamide group that is directly bound to the surface of the solid substance or is bound to the surface of the solid substance through a low molecular weight organic compound.