text: Organocatalysts for asymmetric synthesis can be grouped in several classes:
  * Biomolecules: proline, phenylalanine. Secondary amines in general. The cinchona alkaloids, certain oligopeptides.
  * Synthetic catalysts derived from biomolecules.
  * Hydrogen bonding catalysts, including TADDOLS, derivatives of BINOL such as NOBIN, and organocatalysts based on thioureas
  * Triazolium salts as next-generation Stetter reaction catalysts
  Examples of asymmetric reactions involving organocatalysts are:
  * Asymmetric Diels-Alder reactions
  * Asymmetric Michael reactions
  * Asymmetric Mannich reactions
  * Shi epoxidation
  * Organocatalytic transfer hydrogenation