Pinacol rearrangement

The pinacol–pinacolone rearrangement is a method for converting a 1,2-diol to a carbonyl compound in organic chemistry. The 1,2-rearrangement takes place under acidic conditions. The name of the rearrangement reaction comes from the rearrangement of pinacol to pinacolone.

This reaction was first described by Wilhelm Rudolph Fittig (of Fittig reaction fame) in 1860.