反应详情

To a solution of 3-aminopyrazolo[1,5-a]pyridine (0.74 g, 5.55 mmol) and triethylamine (1.0 ml, 6.95 mmol) in EtOAc (15.0 mL) was added cyclopropanecarbonyl chloride (0.63 mL, 6.95 mmol). The resulting mixture was stirred at room temperature for 48 h and diluted with saturated NaHCO3 solution. More EtOAc and H2O were added and separated. The EtOAc solution was concentrated in vacuo to dryness. The residue was recrystalized from EtOAc to give 0.86 g (77%) of light brown solid as the title compound: mp 159–162° C.; IR (diffuse reflectance) 3207, 3085, 3073, 3044, 2998, 1645, 1596, 1477, 1401, 1356, 1330, 1218, 950, 738, 727 cm−1; MS (EI) m/z 201 (M+); Anal. Calcd for C11H11N3O: C, 65.66; H, 5.51; N, 20.88. Found: C, 65.52; H, 5.48; N, 20.82.

1. customseparated
2. concentrationThe EtOAc solution was concentrated in vacuo to dryness
3. customThe residue was recrystalized from EtOAc