Pyridine → HCID 67097612, compound

Participants

Reaction Steps

To a microwave vial equipped with a stir bar and charged with 5-bromo-N-methylpyridin-3-amine (0.250 g, 1.3 mmol) in isopropanol (3 ml), was added 4-(trifluoromethyl)benzene-1-sulfonyl chloride (0.820 g, 3.3 mmol) and pyridine (0.32 ml, 4.0 mmol) into the mixture. The vial was capped and placed into a CEM Microwave for 20 minutes at 80° C., while 50 watts of energy was supplied via Powermax® (Simultaneous heating while cooling technology). The progress of the reaction was monitored by LC/MS, which showed mostly desired product. The mixture was diluted with DCM and saturated sodium bicarbonate solution, then extracted the organic layer with DCM (3×25 ml). The organics were combined, dried over sodium sulfate, filtered and concentrated in vacuo. The crude was purified by ISCO silica-gel chromatography in a gradient of 0-5% isopropanol/DCM. The fractions with desired product were combined and concentrated in vacuo. This gave N-(5-bromopyridin-3-yl)-N-methyl-4-(trifluoromethyl)benzenesulfonamide (0.300 g, 57% yield) as an off-white crystalline solid. MS (ESI pos. ion) m/z: 396 (MH+). Calc'd exact mass for C13H10BrF3N2O2S: 395. 1H NMR (400 MHz, DMSO-d6): 3.24 (s, 3H), 7.79 (s, 2H), 8.01 (s, 3H), 8.46 (s, 1H), 8.66 (s, 1H).

Provenance & Evidence