potassium hydroxide; sodium hypochlorite; potassium permanganate in 1,4-dioxane; water; acetic acid sulfane synthesized in presence of CH3S2CH3 from iodide; sulfane converted with KMnO4 to sulfone in acetic acid; chlorination with aq. NaOCl; trichloride react with KOH in aq. dioxane;
Beckwith, Athelstan L. J.; Brumby, Steven
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1987 , p. 1801 - 1808