p-Chlorothiophenol → (4-Chlorophenyl)(2,5-difluorobenzyl)sulfane

Participants

Reaction Steps

4-Chlorothiophenol (253 g, 1.75 mol) was dissolved in industrial methylated spirits (1265 mL) and 2M sodium hydroxide solution (901 mL) was added, maintaining the temperature below 20° C. A solution of 2,5-difluorobenzyl bromide (355 g, 1.72 mol) in industrial methylated spirits (250 mL) was added dropwise to the thiolate solution, maintaining the temperature below 15° C. Upon completion of the reaction, water (1000 mL) was added. The resulting slurry was aged at 5° C. and then filtered. The cake was washed sequentially with cold industrial methylated spirits:water (40:60) and then water (500 mL). Drying in vacuo at ambient temperature furnished 2-[[(4-chlorophenyl)thio]methyl]-1,4-difluorobenzene (462.3 g, 99.6%). 1H NMR (CDCl3)—as obtained for the corresponding intermediate of Method (a).

Provenance & Evidence