Triethylamine → (S)-2-((5-cyano-3-fluoro-6-(5-fluoro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)pyridin-2-yl)amino)-3,3-dimethylbutyl methanesulfonate

Participants

Reaction Steps

To a cold (0° C.) solution of (S)-5-fluoro-2-(5-fluoro-1-tosyl-1H-pyrrolo[2,3-b]pyridin-3-yl)-6-((1-hydroxy-3,3-dimethylbutan-2-yl)amino)nicotinonitrile, 98a, (3.77 g, 7.17 mmol) and triethylamine (1.25 mL, 8.96 mmol) in dichloromethane (75 mL) was added methanesulfonyl chloride (0.69 mL, 8.96 mmol). The solution was stirred at room temperature for 1 hour. The solvent was removed under reduced pressure and water (100 mL) and EtOAc (200 mL) were added. The organic phase was separated, dried (MgSO4), filtered and concentrated under reduced pressure to afford 4.22 g of the desired product as a yellow foamy solid that was used without further purification: LC/MS (60-90% ACN/water 5 min with 0.9% FA, C4) m/z 604.45 (M+H) retention time=2.03 minutes.

Provenance & Evidence