Tribenuronmethyl was synthesized in a two-step process involving esterification and amination using 2-methoxycarbonyl-sulfamoylbenzoate and methyl chloroformate as starting material.

First,2-methoxycarbonyl-3-aminosulfonylthiophene reacts with methyl chloroformate to give 2-methoxycarbonyl-3-aminosulfonyl methyl formatethiophene,then thifensulfuron was obtained after the reaction of the above product with 2-amino-4-methoxy-6-methyl-1,3,5-triazine.

This paper is a detailed study of synthesisingtrichloromethyl chloroformate from the two differentmaterials of methyl formate or methyl chlorofor-mate.

Tissue distribution of Cholineserases and its sensitivity to carbamate insecticides in Carassius auratus;