Mcpa-thioethyl

MCPA-thioethyl may be used as an analytical reference standard for the quantification of the analyte in crops and evironmental matrices using different chromatography techniques.

ChEBI: MCPA-thioethyl is an aromatic ether. It has a role as a phenoxy herbicide.

The commercial production of MCPA-thioethyl follows a concise two-step. First, MCPA acid (4-chloro-2-methylphenoxyacetic acid, produced via Williamson etherification of 4-chloro-o-cresol with chloroacetic acid) is converted to its acid chloride using thionyl chloride in toluene to yield the intermediate. This acid chloride is then reacted with ethanethiol or its sodium salt in dichloromethane in the presence of triethylamine, forming the thioester via rapid nucleophilic substitution; the mixture is washed with dilute sodium bicarbonate and water, then vacuum-distilled to obtain technical-grade MCPA-thioethyl.

MCPA-thioethyl is a selective, systemic phenoxyacetic herbicide used for the postemergence control of annual and perennial broadleaved weeds in cereals. Its mode of action involves the inhibition of growth in meristematic region.

Selective, systemic with translocation. Synthetic auxin.

Herbicide; Plant Growth Regulator