Staudinger synthesis

The Staudinger synthesis, also called the Staudinger ketene-imine cycloaddition, is a chemical synthesis in which an imine 1 reacts with a ketene 2 through a non-photochemical 2+2 cycloaddition to produce a β-lactam 3. The reaction carries particular importance in the synthesis of β-lactam antibiotics. The Staudinger synthesis should not be confused with the Staudinger reaction, a phosphine or phosphite reaction used to reduce azides to amines.

For the reaction that reduces azides to amines using phosphorus compounds, see Staudinger reaction.

Reviews on the mechanism, stereochemistry, and applications of the reaction have been published.

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