Diisopropylethylamine → 1-(4-methoxy-7-(3-methyl-1H-1,2,4-triazol-1-yl)-1H-pyrrolo[2,3-c]pyridin-3-yl)-2-(5-(pyridin-2-yl)-3,4-dihydro-2,6-naphthyridin-2(1H)-yl)ethane-1,2-dione

Participants

Reaction Steps

To a suspension of 2-(4-methoxy-7-(3-methyl-1H-1,2,4-triazol-1-yl)-1H-pyrrolo[2,3-c]pyridin-3-yl)-2-oxoacetic acid (0.062 g, 0.205 mmol), 5-(pyridin-2-yl)-1,2,3,4-tetrahydro-2,6-naphthyridine (0.062 g, 0.205 mmol), and TBTU (0.086 g, 0.267 mmol) in DMF (3 mL) was added Hunig's Base (0.2 mL, 1.145 mmol). The mixture was stirred at rt for 15.75 h and quenched with 5 mL of water and concentrated under reduced pressure. The residue was dissolved in DMF, filtered through a plug of glass wool, and was purified by prep HPLC. The fractions containing the expected product were combined and concentrated. The residue was dissolved in dichloromethane and washed with sat. aq. NaHCO3. The organic layer was dried with MgSO4, was filtered, and was concentrated under reduced pressure to give the expected product as a light pink solid. The compound was further purified using BIOTAGE® flash chromatography with a 0-6% MeOH in dichloromethane gradient. The expected product, 1-(4-methoxy-7-(3-methyl-1H-1,2,4-triazol-1-yl)-1H-pyrrolo[2,3-c]pyridin-3-yl)-2-(5-(pyridin-2-yl)-3,4-dihydro-2,6-naphthyridin-2(1H)-yl)ethane-1,2-dione, 1.4 H2O (0.041 g, 0.077 mmol, 37.7% yield), was isolated as an off-white solid. LC/MS: m/z 495.19 (M+H)+, 0.922 min (method 4). 1H NMR (500 MHz, DMSO-d6) δ ppm 11.04 (br. s., 1H) 9.07-9.12 (m, 1H) 8.48-8.71 (m, 2H) 8.20-8.26 (m, 1H) 7.79-7.90 (m, 2H) 7.71-7.74 (m, 1H) 7.27-7.37 (m, 1H) 7.00-7.23 (m, 1H) 4.80-5.00 (m, 2H) 3.75-3.96 (m, 5H) 3.22-3.36 (m, 2H) 2.50-2.61 (m, 3H) 1.57 (s, 3H).

Provenance & Evidence