Asymmetric benzoylation and Henry reaction using reusable polytopic bis(oxazoline) ligands and copper(ii)†
Abstract
Multitopic bis(oxazoline)-based chiral ligands are associated with copper to generate catalysts for the asymmetric benzoylation of meso-hydrobenzoin, the kinetic resolution of rac-hydrobenzoin and the asymmetric Henry reaction. The recycling of the catalytic systems has been studied. The recycling efficiency of the system was found to be dependent on the copper source used.