Patent · US Expired

Process for the production of 4-alkylpyrimidine

US7179914B2 · kind B2 · utility

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0References

16Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Hans Henniges · Bonn, DE
Hans-Juergen Pitz · Langenfeld, DE
Christoph Theis · Niederkassel, DE
Manfred Neumann · Marl, DE

Key dates

Filing date	Feb 17, 2004
Grant date	Feb 20, 2007
Priority date	—
Expiry date	Mar 11, 2025

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D239/26
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.