Simple and scalable preparation of highly active lewis acidic Sn-β

Tin goes in: The solid Lewis acid Sn-zeoliteβ is obtained in a simple and scalable procedure (see scheme). A high metal content can be obtained, without undesirable side-effects. The space-time-yields of the resulting catalysis are over one order-of-magnitude larger than those of the state-of-the-art materials for the Baeyer-Villiger oxidation of cyclohexanone and the synthesis of ethyl lactate from the triose dihydroxyacetone.