(5-Alkylureido-1,3,4-thiadiazol-2-yl-thio) acetic acid tert-butyl esters and herbicidal compositions and processes

摘要

[5-(1,3-dimethylureido)-1,3,4-thiadiazol-2-ylthio]-acetic acid methylester (b.p. 113 DEG C.), [5-(1,3,3-trimethylureido)-1,3,4-thiadiazol-2-ylthio]-acetic acid ethylester (b.p. 95 DEG C.) and [5-(3-methylureido)-1,3,4-thiadiazol-2-ylthio]-acetic acid isopropylester (b.p. 143 DEG C.) in which R is hydrogen or alkyl. The compounds are useful as the active agents or one of the active agents in herbicidal compositions.