Patent · US Active

Method for producing asymmetrical biphenols using selenium dioxide

US9950979B2 · kind B2 · utility

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0References

12Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Katrin Marie Dyballa · Recklinghausen, DE
Robert Franke · Marl, DE
Dirk Fridag · Haltern am See, DE
Michael Mirion · Mainz, DE
Thomas Quell · Recklinghausen, DE
Siegfried R. Waldvogel · Gau-Algesheim, DE

Key dates

Filing date	May 20, 2015
Grant date	Apr 24, 2018
Priority date	—
Expiry date	May 20, 2035

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C41/30
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.