Schiemann reaction

What is Schiemann reaction?

The Schiemann reaction, commonly referred to as the Balz-Schiemann reaction or Balz-Schiemann decomposition, is a widely used method discovered by Balz and Schiemann in 1927 for introducing a fluorine atom into aromatic rings.

Schiemann reaction - Balz-Schiemann reaction - Schiemann decomposition
Schiemann reaction

Schiemann reaction involves the conversion of aromatic amines to diazonium fluoroborates, which are then thermally decomposed to produce aryl fluorides. The reaction is particularly significant for synthesizing specifically fluorinated aromatic compounds, with a relatively high yield of aromatic fluorides obtained from the decomposition in the absence of solvent.

Additionally, the general procedure can be directly applied to producing other aromatic halides.