Balz–Schiemann reaction

The Schiemann reaction (also called the Balz–Schiemann reaction) is a chemical reaction in which anilines (1) are transformed to aryl fluorides (3) via diazonium fluoroborates (2). Named after the German chemists Günther Schiemann and Günther Balz, this reaction is the preferred route to fluorobenzene and some related derivatives, including 4-fluorobenzoic acid.

The reaction is similar to the Sandmeyer reaction, which converts diazonium salts to other aryl halides.