General Method B for Thiol Starting Material Synthesis (compounds 9, 10) The aryl halide substrate (8.9 mmol, 1.0 equiv.) and sodium hydrosulfide hydrate (10.7 mmol. 1.2 equiv.) were added to a 2-neck 50 mL round bottom flask equipped with a stir bar, followed by 13 mL of DMF. This mixture was then stirred for 18 h at 70 o C. Upon completion, the reaction was diluted with water (10 mL) and extracted into EtOAc (5 × 10 mL). The combined organic layers were dried over MgSO4, filtered through Celite, and concentrated in vacuo. The resulting material was carried forward without any further purification. (compounds 9, 10, 12, 14, 16, 17) To a round bottom equipped with a stir bar was added the thiol starting material (6.8 mmol, 1.0 equiv.) suspended in 30 mL H2O. NaOH (0.27g, 6.8 mmol, 1.0 equiv.) was then added and the reaction was stirred for 30 min at room temperature (ca. 23 o C). K3[Fe(CN)6] (2.7g, 8.2 mmol, 1.2 equiv.) was added and the reaction was allowed to stir at room temperature for 22 h, at which point a precipitate had formed. The crude reaction mixture was filtered. The resulting off-white solid was then dissolved in CH2Cl2, dried over MgSO4, and concentrated in vacuo. The resulting material was carried forward without any further purification.