Pyridine → 2-(5-methoxy-2-methyl-1H-indol-3-yl)-N-[6-(1H-pyrazol-4-yl)isoquinolin-3-yl]acetamide

Participants

Reaction Steps

To a solution of 2-(5-methoxy-2-methyl-1H-indol-3-yl)acetic acid (219.2 mg, 0.5 mmol) in 5 mL of anhydrous THF was added oxalyl chloride (119.6 mg, 0.95 mmol), and 100 μL of DMF also was added. A effervescence occurred. Within 1-4 minutes the effervescence stopped. The mixture was stirred for 30 minute at room temperature, followed by addition of 6-(1H-Pyrazol-4-yl)-isoquinolin-3-ylamine in 5 mL of pyridine (100.0 mg, 0.5 mmol). The reaction was stirred at the ambient temperature over 16 hours as it was monitored by LC/MS. To the reaction mixture was added K2CO3 (196.7 mg, 1.4 mmol) and water (2 mL). The solution was heated to 70° C. for 5 hours. Removal of the solvents provided a crude mixture that was purified by HPLC using H2O/CH3CN/0.1% acetic acid as a mobile phase to give the title compound as a crystalline solid product (9.9 mg, 5.1%). 1H NMR (DMSO-d6, 400 MHz): δ 3.68 (2H, s), 3.73 (3H, s), 6.90 (2H, d, J=8.8 Hz), 7.31 (2H, d, J=8.6 Hz), 7.31 (1H, d, J=8.6 Hz), 7.81 (1H, dd, J=8.6, 1.5 Hz), 8.00 (1H, d, J=8.8 Hz), 8.08 (1H s), 8.10-8.22 (1H, m), 8.40 (2H, s), 9.03 (1H, s), 10.69 (1H, s), 13.09 (1H, s). 13CNMR (DMSO-d6, 100 MHz): δ 40.13, 55.00, 106.29, 113.75, 120.55, 124.10, 124.38, 127.87, 128.04, 130.12, 135.25, 137.87, 147.50, 150.75, 158.04, 170.13. HRMS: m/z 359.14959, calc 359.15025. MS m/z, (APCI); 359.1 [(M+1)+100].

Provenance & Evidence