METHOD FOR PRODUCING THIFENSULFURON-METHYL Russian patent published in 2023 - IPC A01N47/36 C07D409/12 C07D251/02 C07D333/02 

FIELD: pesticides.

SUBSTANCE: method for producing thifensulfuron-methyl (3-[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)carbamoylsulfamoyl]thiophen-2-carboxylate), which is a selective systemic post-emergence herbicide. The method for obtaining the target herbicide consists in the interaction of 3-(aminosulfonyl)thiophene-2-carboxylic acid methyl ester with 2-(phenoxycarbonyl)amino-4-methoxy-6-methyltriazine-1,3,5 in an anhydrous polar organic solvent in the presence of an organic base at a temperature of 20-25°C for 1-2 hours in an inert gas atmosphere or in air without moisture access, followed by treatment of the obtained reaction mass with a mineral or organic acid to obtain the target product, its isolation and purification.

EFFECT: simplifying the hardware design, reducing the duration of the synthesis, increasing the safety of the process and obtaining the target product of high quality with a yield of 80 -85%.

6 cl, 4 ex