Patent · US Expired

Method for producing 2-anilino-4,6-dimethylpyrimidine

US7279577B2 · kind B2 · utility

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13Claims

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Assignee

Degussa AG · DE

Inventors

Thomas Gastner · Trostberg, DE
Anita Hölzl · Taufkirchen, DE
Claudia Huber · Cham, DE
Alfred Mascha · Garching bei München, DE

Key dates

Filing date	Feb 21, 2003
Grant date	Oct 9, 2007
Priority date	—
Expiry date	Aug 16, 2024

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D239/42
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

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