Oxidation of benzylic alcohols over Cr (MCM-41/ZSM-5) assisted by microwaves

The oxidation of benzylic alcohols in the machine of microwave (Discover, CEM-SP1245 model, USA) by the composite material type Cr-(MCM41/ZSM5) with high crystallinity, exchanged at low content of chromium has dramatically reduced the reaction times and have high conversion rates and high yields compared to conventional heating. Ketones were obtained for only 10 min of reaction. The composite materials used containing both micropore and mesopore structures are stable for this type of reaction. The method uses composite materials Cr (50-MCM41/ZSM5) as the catalyst system and t-BuOOH as the stoichiometric terminal oxidant. The reactions carried out by the microwave and made without the use of an organic solvent, because, the substrates are mixed directly or, in our case, the subtract is mixed with silica which is inactive in the reaction.