反应详情

To a stirred solution of Example 42 (0.025 g, 0.08 mmol) in DCM (1 mL) were added 1-methylimidazol-5-ylcarboxylic acid (0.013 g, 0.10 mmol), DIPEA (0.02 mL, 0.10 mmol), EDC (0.030 g, 0.16 mmol) and HOBT (0.05 g, 0.04 mmol). The reaction mixture was stirred at r.t. for 18 h, then concentrated in vacuo. Purification by preparative HPLC (Method 6) gave the title compound (0.01 g, 29%) as a yellow oil. δH (CDCl3) 9.25 (1H, s), 8.46-8.43 (1H, m), 7.33 (1H, dd, J 8.9 and 2.4 Hz), 7.07 (1H, d, J 0.9 Hz), 7.02 (1H, d, J 0.8 Hz), 6.94 (1H, d, J 8.9 Hz), 5.56 (1H, br. s), 4.36-4.29 (2H, m), 4.16-4.09 (2H, m), 4.11 (3H, s), 2.90 (2H, s), 1.40 (6H, s). LCMS (ES+) 439.4 (M+H)+, RT 2.69 minutes (Method 1).

1. concentrationconcentrated in vacuo
2. customPurification by preparative HPLC (Method 6)