The pinacol rearrangement or pinacol-pinacolone rearrangement is a method for converting a 1,2-diol to a carbonyl compound in organic chemistry. This 1,2-rearrangement takes place under acidic conditions. The name of the reaction comes from the rearrangement of pinacol to pinacolone.
This reaction was first described by Wilhelm Rudolph Fittig in 1860.
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