Abstract
Selective oxidation is quite important in synthesis. Here we report a Pd-catalyzed method to selectively oxidize allylic alcohols to enones and enals at room temperature. 27 compounds, including enones, and enals, have been obtained with moderate to excellent yields. Meanwhile, this approach proceeds well on a preparative scale giving a good yield. This work allows the efficient and selective oxidization of various allylic alcohols to access various enones and enals, even in the presence of benzylic alcohols. This procedure avoids the use of stoichiometric or superstoichiometric quantities of oxidant reagents such as MnO2 and uses free oxygen in the air as our green oxidant in the whole process.
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