Efficient resolution of 2,2′-dihydroxy-1,1′-binaphthyl by inclusion complexation with chiral N-(3-chloro-2-hydroxypropyl)-N,N,N-trimethylammonium chloride†
Abstract
The complete resolution of 2,2′-dihydroxy-1,1′-binaphthyl into its enantiomers by inclusion complexation with a commercially available derivative of choline, is reported. The two enantiomers are recovered in >99% ee from the inclusion complexes by simple dissolution in a diethyl ether–water medium and the resolving agent can be recycled.