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:
Oct. 09, 2007
Filed:
Feb. 21, 2003
Thomas Gastner, Trostberg, DE;
Anita Hölzl, Taufkirchen, DE;
Claudia Huber, Altenmarkt, DE;
Alfred Mascha, Garching, DE;
Thomas Gastner, Trostberg, DE;
Anita Hölzl, Taufkirchen, DE;
Claudia Huber, Altenmarkt, DE;
Alfred Mascha, Garching, DE;
Degussa AG, Trostberg, DE;
Abstract
In this method for producing 2-anilino-4,6-dimethylpyrimidine by reacting phenylguanidine and/or one of its salts with acetylacetone the reaction takes place in the presence of water and/or without separating the amounts of water that are formed during the reaction. Phenylguanidine carbonate and phenylguanidine hydrogen carbonate preferably in a water-moist form are used for this reaction which is preferably carried out at pressures between 0.1 and 10 bar and at temperatures between 40 and 180° C. In this manner a finely crystalline product of high purity is obtained in very good yields by a technically simple method.