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. 29, 2011
Filed:
Oct. 05, 2007
Matthias Krull, Harxheim, DE;
Alexander Lerch, Gelnhausen, DE;
Roman Morschhaeuser, Mainz, DE;
Norbert Beye, Kelkheim, DE;
Hanspeter Gethoeffer, Budenheim, DE;
Helmut Ritter, Wuppertal, DE;
Sarah Schmitz, Duesseldorf, DE;
Matthias Krull, Harxheim, DE;
Alexander Lerch, Gelnhausen, DE;
Roman Morschhaeuser, Mainz, DE;
Norbert Beye, Kelkheim, DE;
Hanspeter Gethoeffer, Budenheim, DE;
Helmut Ritter, Wuppertal, DE;
Sarah Schmitz, Duesseldorf, DE;
Clariant Finance (BVI) Limited, Tortola, VG;
Abstract
The invention relates to a method for producing bisbenzoxazoles that are interconnected by means of a system of conjugated double bonds, according to which o-aminophenols are reacted with dicarboxylic acids, the carboxyl groups of which are interconnected via a double bond or a system of conjugated double bonds, to form an ammonium salt, said ammonium salt being converted in the presence of dehydrogenating catalysts and solvents with a low dielectric loss into benzoxazol by means of microwave radiation.