Evonik Degussa Gmbh

Michael Mirion

Robert Franke

Katrin Marie Dyballa

Siegfried R Waldvogel

Thomas Quell

Dirk Fridag

The present invention relates to a method for coupling two arenes with selenium dioxide to give a selenobiaryl ether. The method of the present invention includes: adding a first arene to the reaction mixture, adding a second arene to the reaction mixture, adding selenium dioxide to the reaction mixture, adding an acid having a pKa in the range from 0 to 5 to the reaction mixture, and adjusting the reaction temperature of the reaction mixture such that the first arene and the second arene are converted to a selenobiaryl ether. The present invention also relates to novel selenobiaryl ethers.

Coupling of two arenes with selenium dioxide to give a selenobiaryl ether

A process for preparing unsymmetric biphenols, comprising: a) adding a first substituted phenol to the reaction mixture; b) adding a second substituted phenol having different substitution than the first phenol to the reaction mixture; c) adding selenium dioxide to the reaction mixture; d) adding a solvent; and e) heating the reaction mixture such that the first substituted phenol and the second phenol having different substitution are converted to an unsymmetric biphenol.

Method for producing asymmetrical biphenols using selenium dioxide

Method for coupling a phenol and an arene using selenium dioxide, and also novel phenol-arene derivatives.

Coupling a phenol and an arene using selenium dioxide

A process for preparing a 2,2'-biphenol, proceeds by a) adding a first phenol to a reaction mixture, b) adding a second phenol to the reaction mixture, c) adding selenium dioxide to the reaction mixture, d) adding an acid having a pKa in the range from 0.0 to 5.0 to the reaction mixture, and e) heating the reaction mixture such that the first phenol and the second phenol are converted to said 2,2&#x2032;-biphenol.

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Mainz, Germany

Michael Mirion