Patent ID: 8846944

Claim:
A process for regeneration of chiral 2,2′-cyclopropylidene-bis(oxazoline) from a reaction mixture of a catalytic organic reaction, in which said 2,2′-cyclopropylidene-bis(oxazoline) is used as ligand part of a complex catalyst, comprising the following steps of: separation of 2,2′-cyclopropylidene-bis(oxazoline) from the reaction mixture by sorption of 2,2′-cyclopropylidene-bis(oxazoline) on a sorbent; isolation of the sorbent with sorbed 2,2′-cyclopropylidene-bis(oxazoline) from reaction mixture; desorption of 2,2′-cyclopropylidene-bis(oxazoline) from the sorbent; recovery of 2,2′-cyclopropylidene-bis(oxazoline) from organic solvent used for desorption procedure, and the 2,2′-cyclopropylidene-bis(oxazoline) is (3aR,3′aR,8aS,8′aS)-2,2′-cyclopropylidenebis-[3a,8a]-dihydro-8H-indeno-[1,2-d]-oxazole.