Pyridine → (R)-2-((6-((3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanone oxime

Participants

Reaction Conditions

Reaction Steps

(R)-2-((6-((3H-Imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanone from Example 54 (70 mg, 0.19 mmol) was stirred in EtOH. Pyridine (100 μL, excess) and NH2OH.HCl (100 mg, excess) were added and the resulting mixture was heated at 88° C. for 1 h. LCMS showed that the reaction was complete. The mixture was then cooled to rt and purified by HPLC using a mixture of water (5% CH3CN, 0.05% HCOOH) and CH3CN (0.05% HCOOH) as the mobile phase and Varian Pursuit XRs C-18 column as the stationary phase to afford (R)-2-((6-((3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]thiazol-2-yl)amino)cyclohexanone oxime (53 mg, 73%) as a white powder. 1H NMR (300 MHz, DMSO-d6) δ 10.57 (s, 1H), 8.60 (s, 1H), 8.38 (d, J=4.0 Hz, 1H), 8.13-8.27 (m, 1H), 8.09 (dd, J=0.8, 7.9 Hz, 1H), 7.58-7.76 (m, 1H), 7.10-7.39 (m, 3H), 5.49 (s, 2H), 4.33-4.77 (m, 1H), 2.69-2.95 (m, 1H), 1.92-2.38 (m, 2H), 1.26-1.86 (m, 5H). LCMS (ESI) m/z 393 (M+H)+.

Provenance & Evidence