Used as a coupling reagent in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds in pharmaceutical and agrochemical synthesis. Its stability and reactivity make it suitable for constructing biaryl compounds, which are common structural motifs in drug development. The ethylthio group acts as a directing and functional handle, allowing further modification in multistep syntheses. Commonly employed in late-stage functionalization to introduce aryl groups under mild palladium-catalyzed conditions.