Synthesis of chiral ionic liquids by ion cross-metathesis: en route to enantioselective water-ionic liquid extraction (EWILE), an eco-friendly variant of the ELLE process

From two initial ILs two other ILs are obtained by simultaneous ion exchange. The hydrophobic ions unite in the hydrophobic layer, whereas the hydrophilic ions gather in water. This protocol is explored as a variant of the ELLE process, in which an enantiomer of a racemic mixture is preferentially extracted with water.