Methanesulfonyl chloride → HCID 131731197, compound

Participants

Reaction Steps

A solution of tert-butyl 3-amino-5-bromopyridin-2-ylcarbamate (96.3 mg, 0.33 mmol) and diisopropylethylamine (128 uL, 074 mmol) in dichloromethane (2 mL) was cooled to 0° C., and to it was added methanesulfonyl chloride (52 uL, 0.67 mmol). The mixture was allowed to warm to rt over 2 h. The mixture was then diluted with dichloromethane and was then washed with aqueous citric acid (10%) followed by water. The organic phase was then dried over magnesium sulfate, filtered, and concentrated in vacuo. The residue was purified by flash chromatography (gradient, 100% hexanes to 70% hexanes:30% ethyl acetate) to provide tert-butyl 5-bromo-3-(N-(methylsulfonyl)methylsulfonamido)pyridin-2-ylcarbamate (77 mg, 0.17 mmol, 52% yield) as a colorless film. 1H NMR (400 MHz, CDCl3) δ 8.64 (d, 1H), 7.79 (d, 1H), 7.10 (s, 1H), 3.44 (s, 6H), 1.52 (s, 9H); MS (EI) for C12H18BrN3O6S2: 388, 390 (Br isotopes, MH+-t-butyl).

Provenance & Evidence