N-bromobutanimide → N-[2-(3-Bromo-6-chloro-2H-pyrazolo[4,3-b]pyridin-2-yl)-1-cyano-1-methylethyl]-4-trifluoromethoxybenzamide

Participants

Reaction Conditions

Reaction Steps

A mixture of N-[2-(6-Chloro-2H-pyrazolo[4,3-b]pyridin-2-yl)-1-cyano-1-methylethyl]-4-trifluoromethoxybenzamide (134 mg described in Example 155) and N-bromosuccinimide (68 mg) in acetonitrile (3.5 mL) was heated to 60° C. overnight. The mixture was concentrated under reduced pressure to yield a residue that was purified by chromatography (SiO2, heptane/EA) to afford the title compound as a white solid (125 mg, 80%). MS (ES): M/Z [M+H]=502. 1H NMR: (400 MHz, DMSO-d6): 1.78 (s, 3H), 5.10-5.22 (m, 2H), 7.52 (d, J=8.2 Hz, 2H), 7.98 (d, J=8.7 Hz, 2H), 8.43 (d, J=2.0 Hz, 1H), 8.58 (d, J=1.9 Hz, 1H) and 9.00 (s, 1H). 19F NMR (376 MHz, DMSO-d6): −57.1 (s, 3F).

Provenance & Evidence