Metal organic frameworks as solid promoters for aerobic autoxidations

This manuscript illustrates the activity of MIL-101(M) (M = Cr, Fe) (MIL: Materiaux Institute Lavoisier) as solid promoter of aerobic oxygenations of organic compounds, including benzylic hydrocarbons and alcohols, sulfur-containing condensed heterocycles and thiols. MIL-101(M) (M = Cr, Fe) has been selected due to its high structural stability, open porosity and adequate composition that make the solid recoverable and reusable without observing any decrease in its ability to promote the reactions. Available kinetic data indicates that these oxygenation reactions occur through a radical-chain mechanism with a long-propagation chain. Comparison with homogeneous radical initiators shows that MIL-101 can be more selective towards the wanted products, a fact that has been interpreted assuming that the reaction takes place inside the pores of this metal organic framework. (C) 2017 Elsevier B.V. All rights reserved.