Process for the preparation of 1-amino-1,3,5-triazine-2,4(1H, 3H)-dione compounds

US4356024A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karlfried Dickore' · Leverkusen, DE
• Engelbert Kuhle · Wittlich, DE

Key dates

• Filing date: Feb 10, 1981
• Grant date: Oct 26, 1982
• Expiry date: Feb 10, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D251/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of a 1-amino-1,3,5-triazine-2,4(1H, 3H)-dione compounds comprising the steps of reacting an N-substituted imido-dicarboxylic acid diaryl ester with an isothiosemicarbazone at a temperature of between 50.degree. and 150.degree. C. to form a 1-alkylidene-amino-1,3,5-triazine-2,4(1H, 3H)-dione reaction product; and thereafter, hydrolyzing the reaction product in an acid medium. The reaction product need not be separated from the reaction mixture before the hydrolysis step. Certain novel 1-amino-1,3,5-triazine-2,4(1H, 3H)-dione compounds are provided. The compounds are useful as herbicides.