1,1'-Carbonyldiimidazole → HCID 71281084, compound

Participants

Reaction Conditions

Reaction Steps

A stirring suspension of 3-(imidazo[1,2-a]pyridine-3-carboxamido)-4-methylbenzoic acid (4) (41 mg, 0.138 mmol) in anhydrous NMP (1 mL) was heated in the microwave at 105° C. for 2 minutes to dissolve all solid. Then, 1,1′-carbonyldiimidazole (22 mg, 0.138 mmol) was added and the reaction was stirred at room temperature for 15 minutes. N′-hydroxymorpholine-4-carboximidamide (20 mg, 0.138 mmol) was added and the reaction was stirred for 30 minutes. The reaction was heated in the microwave at 130° C. for 15 minutes. The crude product was purified by reverse phase preparative HPLC to give N-(2-methyl-5-(3-morpholino-1,2,4-oxadiazol-5-yl)phenyl)imidazo[1,2-a]pyridine-3-carboxamide (F75). 1H NMR (400 MHz, d6-DMSO) δ 10.18 (s, 1H), 9.52-9.48 (m, 1H), 8.68 (s, 1H), 8.11 (d, J=2.0 Hz, 1H), 7.88-7.83 (m, 2H), 7.68-7.63 (m, 1H), 7.54 (d, J=8.0 Hz, 1H), 7.31-7.27 (m, 1H), 3.72-3.69 (m, 4H), 3.41-3.38 (m, 4H), 2.39 (s, 3H). MS m/z 405.16 (M+1)+.

Provenance & Evidence