Synlett 2013; 24(8): 951-954
DOI: 10.1055/s-0032-1318481
letter
© Georg Thieme Verlag Stuttgart · New York

Rediscovering the Double Friedel–Crafts Acylation: An Expedient Entry to Phenanthrene-9,10-diones

Nicoletta Crosta
a   Institute of Organic Chemistry (IOC), Karlsruher Institute of Technology (KIT), Fritz-Haber-Weg 6, Campus Süd, Geb. 30.42, 76131 Karlsruhe, Germany   Fax: +49(721)60848581   eMail: kye.masters@kit.edu   eMail: stefan.braese@kit.edu
,
Sebastian Müller
a   Institute of Organic Chemistry (IOC), Karlsruher Institute of Technology (KIT), Fritz-Haber-Weg 6, Campus Süd, Geb. 30.42, 76131 Karlsruhe, Germany   Fax: +49(721)60848581   eMail: kye.masters@kit.edu   eMail: stefan.braese@kit.edu
,
Dietmar Gradl
b   Zoological Institute, Cell and Developmental Biology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
,
Kye-Simeon Masters*
a   Institute of Organic Chemistry (IOC), Karlsruher Institute of Technology (KIT), Fritz-Haber-Weg 6, Campus Süd, Geb. 30.42, 76131 Karlsruhe, Germany   Fax: +49(721)60848581   eMail: kye.masters@kit.edu   eMail: stefan.braese@kit.edu
c   School of Chemistry, Physics and Mechanical Engineering, Faculty of Science and Engineering, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia
,
Stefan Bräse*
a   Institute of Organic Chemistry (IOC), Karlsruher Institute of Technology (KIT), Fritz-Haber-Weg 6, Campus Süd, Geb. 30.42, 76131 Karlsruhe, Germany   Fax: +49(721)60848581   eMail: kye.masters@kit.edu   eMail: stefan.braese@kit.edu
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Publikationsverlauf

Received: 19. Januar 2013

Accepted after revision: 26. Februar 2013

Publikationsdatum:
05. April 2013 (online)


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Abstract

The double Friedel–Crafts acylation of readily accessible biaryls with oxalyl chloride delivers the respective phenanthrene-9,10-diones, providing an alternative to the traditional methods, which require harsh oxidizing conditions and multistep sequences. This simple method allows the synthesis of various symmetrical and non-symmetrical targets, and is even effective for the synthesis of the parent ring system from (unactivated) biphenyl.