= Rainer Ludwig Claisen
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= Ludwig Claisen
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<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.<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]{ref}
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{title=Portrait of <Rainer Ludwig Claisen>}
{description=Unknown author; University of Kiel. Public domain. https://commons.wikimedia.org/wiki/File:Ludwig_Claisen_1897_Kiel.jpg[Source usage terms], via Wikimedia Commons.}
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