Water soluble homogeneous catalysts that are recoverable by phase selectivity and host-guest interactions
AssigneeThe Florida State University Research Foundation, Inc.
InventorHoyong Chung
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Abstract
A chemical reaction is catalyzed in an organic solvent using a water soluble N-heterocyclic carbene homogeneous catalyst to form a reaction mixture. An aqueous phase in the reaction mixture. A solvent in which the catalyst is insoluble is added to the reaction mixture, causing the catalyst to migrate to the aqueous phase to form a catalyst-laden aqueous phase. The catalyst is extracted from the catalyst-laden aqueous phase.
Claims16
A method comprising:
- catalyzing a chemical reaction in an organic solvent using a water soluble N-heterocyclic carbene homogeneous catalyst to form a reaction mixture;
- forming an aqueous phase in the reaction mixture;
- adding a solvent in which the catalyst is insoluble to the reaction mixture causing the catalyst to migrate to the aqueous phase to form a catalyst-laden aqueous phase;
- and
- extracting the catalyst-laden aqueous phase from the reaction mixture;
- wherein the catalyst includes a transition metal bonded to an N-heterocyclic carbene moiety bonded to a polyethylene glycol functional group bonded to a terminal adamantyl group.
A composition comprising a water soluble homogeneous catalyst including a transition metal complex having an N-heterocyclic carbene ligand with a polyethylene glycol group thereon, further comprising a terminal adamantyl group bonded to the polyethylene glycol group.
A composition comprising a water soluble homogeneous catalyst including a transition metal complex having an N-heterocyclic carbene ligand with a polyethylene glycol group thereon, further comprising a cyclodextrin bound to the catalyst, the catalyst and cyclodextrin forming a host-guest compound.
A method comprising:
- catalyzing a chemical reaction in an organic solvent using a water soluble N-heterocyclic carbene homogeneous catalyst to form a reaction mixture;
- forming an aqueous phase in the reaction mixture;
- adding a solvent in which the catalyst is insoluble to the reaction mixture causing the catalyst to migrate to the aqueous phase to form a catalyst-laden aqueous phase;
- and
- extracting the catalyst-laden aqueous phase from the reaction mixture using a cyclodextrin bound to the catalyst, the catalyst and cyclodextrin forming a host-guest compound.
Dependencies are inferred from the claim text.