The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2018
Filed:
Aug. 18, 2016
Evonik Degussa Gmbh, Essen, DE;
Katrin Marie Dyballa, Recklinghausen, DE;
Robert Franke, Marl, DE;
Dirk Fridag, Haltern am See, DE;
Siegfried R. Waldvogel, Gau-Algesheim, DE;
Bernd Elsler, Bonn, DE;
Anton Wiebe, Neuwied, DE;
Sebastian Lips, HĂĽffelsheim, DE;
EVONIK DEGUSSA GMBH, Essen, DE;
Abstract
The present invention relates to a process for preparing unsymmetric compounds from the group of the m-terphenyls which can be used as unsymmetric OCO pincer ligands, comprising the process steps of a) reacting a first substituted or unsubstituted phenol with a 1,3-disubstituted arene which may likewise be substituted in the 2 and 5 positions to obtain a phenol-arene coupling product and b) optionally protecting the OH group of the phenol-arene coupling product with a protecting group to obtain a protected phenol-arene coupling product, and c) reacting the phenol-arene coupling product from a) or b) with a second substituted or unsubstituted phenol to obtain an unsymmetric m-terphenyl, with the proviso that the first phenol and the second phenol have different substitution, characterized in that at least one of process steps a) and c) is conducted as an electrochemical process step.