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Rainer Ludwig Claisen Created 2026-10-24 Updated 2026-11-05
Rainer Ludwig Claisen investigated rearrangements that make new carbon–carbon chemical bonds. His 1912 paper describes conversion of phenol allyl ethers into carbon-allylated phenols, a transformation now associated with the Claisen rearrangement. The product moves the allyl attachment from oxygen to the aromatic carbon skeleton.[ref]
Über Umlagerung von Phenol-allyläthern in C-Allyl-phenole by Rainer Ludwig Claisen. Über Umlagerung von Phenol-allyläthern in C-Allyl-phenole, 1912, pp.3157–3166
Portrait of Rainer Ludwig Claisen
. Unknown author; University of Kiel. Public domain. Source usage terms, via Wikimedia Commons. Source.