General Method B for Disulfide Starting Material Synthesis (compound 7) The thiophenol starting material (1 mmol, 1.0 equiv.) was added to a round bottom flask equipped with a stir bar; a mixture of 5:1 MeCN:H2O (3 mL) was added. Iodine (0.5 mmol, 1.0 equiv.) was added, and the reaction was stirred for 2 h at room temperature (ca. 23 o C). The reaction was quenched with 3 mL 1 % aqueous sodium thiosulfate and extracted into CH2Cl2. The organic layers were combined, dried with MgSO4, and concentrated in vacuo. The desired disulfide products were obtained as off-white solids and were used without further purification.