Abstract

AbstractA solution to the long‐standing challenge of developing a highly effective method for the enantioselective intermolecular benzoin condensation of aromatic aldehydes is described. The chiral bis‐bicyclic triazolium salt – 1,3‐bis{(S)‐5‐benzyl‐6,8‐dihydro‐5H‐[1,4]oxazino[2,1‐c][1,2,4]triazol‐2‐ium‐2‐yl}benzene dichloride [(S)‐5a‐1] is currently the most efficient precatalyst for the asymmetric variant of the benzoin condensation.

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