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:
Jul. 23, 2015
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;
Mathias Enders, Hackenheim, 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;
Mathias Enders, Hackenheim, DE;
EVONIK DEGUSSA GMBH, Essen, DE;
Abstract
An electrochemical treatment of differently protected aniline or napthylamine results in the preparation of unsymmetrical 2, 2'-diaminebiaryls provided with different protecting groups. The treatment involves the protecting groups prior to the C, C coupling step. The co-reactants generally have different oxidation potentials which results from the selection of the protecting groups. The treatment also enables controlled access to the individual amino functions of the 2, 2′-diaminobiaryls by subsequent selective deprotection.