反应详情

0.54 ml (3.84 mmol) of triethylamine and then 0.21 ml (2.95 mmol) of acetyl chloride are added, under a nitrogen atmosphere, to 0.8 g (2.56 mmol) of (1-aminoimidazo[1,5-a]pyridin-3-yl)(3-methoxy-4-nitrophenyl)methanone obtained in example 76 in 20 ml of 1,2-dichloroethane. The reaction medium is stirred at ambient temperature for 16 hours and then taken up in a mixture of dichloromethane and water. The organic phase is separated by settling, dried over sodium sulfate and concentrated under reduced pressure. The residue obtained is purified by column chromatography on silica gel, elution being carried out with a dichloromethane/acetone (94/6) mixture. 0.523 g of an orange solid is collected. Melting point: 256° C.; 1H NMR (d6-DMSO): 2.14 (3H, s), 4.02 (3H, s), 7.34-7.44 (2H, m), 7.94-8.08 (3H, m), 8.09 (1H, s), 9.75 (1H, d)

1. customThe organic phase is separated
2. dry with materialdried over sodium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe residue obtained
5. customis purified by column chromatography on silica gel, elution
6. custom0.523 g of an orange solid is collected