A 10 mL round-bottom flask was charged with a stir bar, N-H aziridine silanol substrate (1 equiv.), and CH2Cl2 (final reaction concentration of 0.1 M). The reaction flask was cooled to 0 °C using an ice-water bath. 4-toluenesulfonyl chloride (TsCl) (1.2 equiv.) was added in one portion. Subsequently, Et3N (1.5 equiv.) was added dropwise. The ice-water bath was removed, and the reaction mixture was allowed to warm to room temperature over a period of 1 hour. Following this time, the reaction mixture was diluted with CH2Cl2, transferred to a separatory funnel, and washed with one portion of 0.2 M aqueous HCl solution. The organic layer was collected, dried over MgSO4, and concentrated under reduced pressure. The resulting residue was purified by chromatography on silica gel (specific conditions are associated with each compound).