A 50 mL round-bottom flask was charged with a stir bar, alkenyl silanol substrate, and CH3CN (5 mL/ mmol of substrate, 0.2 M final concentration). Chloramine-T•3H2O (1.1 equivalents) was added in one portion followed by trimethylphenylammonium tribromide (0.2 equiv.). The heterogenous mixture was allowed to stir for 24 hours. Following this time, the mixture was diluted with 50 mL of 50% EtOAc in hexanes and filtered through a pad of silica gel. The filtrate was concentrated under reduced pressure, and the resulting residue was purified by chromatography on silica gel (see individual substrates for specific conditions).