Claisen may refer to: *

Rainer Ludwig Claisen Rainer Ludwig Claisen (; 14 January 1851 – 5 January 1930) was a German chemist best known for his work with condensations of carbonyls and sigmatropic rearrangements. He was born in Cologne as the son of a jurist and studied chemistry at the u ...

, a German chemist **

Claisen rearrangement The Claisen rearrangement is a powerful carbon–carbon chemical bond, bond-forming chemical reaction discovered by Rainer Ludwig Claisen. The heating of an allyl Vinyl group, vinyl ether will initiate a Sigmatropic reaction, ,3sigmatropic r ...

, a reaction of a allyl vinyl ether to a γ,δ-unsaturated carbonyl **

Claisen condensation The Claisen condensation is a carbon–carbon bond forming reaction that occurs between two esters or one ester and another carbonyl compound in the presence of a strong base. The reaction produces a β-keto ester or a β- diketone. It is named ...

, a reaction between esters and carbonyl compounds in the presence of a strong base ** Ireland–Claisen rearrangement, a chemical reaction of an allylic ester with strong base ** Claisen isatin synthesis

See also