Diisopropylethylamine → (1R,2R)-2-((6-((3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]oxazol-2-yl)amino)cyclohexanol

Participants

Reaction Conditions

Reaction Steps

A stirred mixture of 6-((3H-imidazo[4,5-b]pyridin-3-yl)methyl)-2-(methylthio)benzo[d]oxazole (165 mg, 0.53 mmol) from Step 5 of this Example, (1R,2R)-(−)-2-aminocyclohexanol (122 mg, 1.06 mmol), and DIEA (137 mg, 1.06 mmol) in anhydrous DMA (3 mL) was sealed and heated at 100° C. for 15 h. The reaction mixture was cooled to rt and purified directly by reverse-phase HPLC using a mixture of water (5% CH3CN, 0.05% HOAc), CH3CN (0.05% HOAc) as the mobile phase and Varian Pursuit XRs diphenyl column as the stationary phase to afford (1R,2R)-2-((6-((3H-imidazo[4,5-b]pyridin-3-yl)methyl)benzo[d]oxazol-2-yl)amino)cyclohexanol (44 mg, 23%) as a white solid. 1H NMR (300 MHz, DMSO-d6) δ 8.60 (s, 1H), 8.39 (dd, J=1.1, 4.7 Hz, 1H), 8.08 (dd, J=1.2, 8.0 Hz, 1H), 7.81 (d, J=7.5 Hz, 1H), 7.40 (s, 1H), 7.29 (dd, J=4.7, 8.1 Hz, 1H), 7.10-7.19 (m, 2H), 5.50 (s, 2H), 4.70 (br s, 1H), 3.25-3.45 (m, 2H), 1.83-1.97 (m, 2H), 1.57-1.67 (m, 2H), 1.14-1.32 (m, 4H). LCMS (ESI) m/z 364 (M+H)+.

Provenance & Evidence