反应详情

温度

25 °C

To a 250-mL, round-bottomed flask was added 6-chloroimidazo[1,2-b]pyridazine-2-carboxylic acid (2.0 g, 10 mmol, Maybridge, Cornwall, UK) and CH2Cl2 (40 mL). To the mixture was added oxalyl chloride (20 mL, 40 mmol, 2 M in CH2Cl2) and DMF (8.0 μL, 0.10 mmol). The mixture was stirred for 1.5 h at 25° C. Toluene (10 mL) was added and the mixture was concentrated to afford the title compound which was taken on to the next step without further purification.

1. concentrationthe mixture was concentrated