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:
Feb. 20, 2007
Filed:
Feb. 17, 2004
Hans Henniges, Frankfurt, DE;
Hans-juergen Pitz, Roesrath, DE;
Christoph Theis, Niederkassel, DE;
Manfred Neumann, Marl, DE;
Hans Henniges, Frankfurt, DE;
Hans-Juergen Pitz, Roesrath, DE;
Christoph Theis, Niederkassel, DE;
Manfred Neumann, Marl, DE;
Degussa AG, Duesseldorf, DE;
Abstract
4-alkylpyrimidine is produced by reacting formamide with a formyl methyl alkyl ketone diacetal without the addition of water at a temperature that allows removal of the 4-alkylpyrimidine from the reaction mixture by distillation. The process is readily applicable on an industrial scale and succeeds without the addition of water or ammonium chloride as a catalyst and permits the production of 4-alkylpyrimidine in good yields and excellent purities without time-consuming extraction steps.