反应详情

温度

70 °C

1-(1-Cyclopropylethyl)-3-methyl-1H-pyrazol-5-amine (500 mg, 3.03 mmol) and ethyl 4-cyclopropyl-2,4-dioxobutanoate (557 mg, 3.03 mmol) were suspended in Toluene (10 mL) and heated at 70° C. for 16 h. The solvent was removed in vacuo and the crude residue was purified via silica gel chromatography (eluent: gradient of 0 to 10% EtOAc:Hex). The final product was collected as a solid, 0.722 g (76%). LCMS E-S (M+H)=314.3 1H NMR (400 MHz, DMSO-d6) ppm 0.17-0.32 (m, 2H), 0.39 (m, J=9.69, 4.82, 4.82, 4.67 Hz, 1H), 0.51-0.62 (m, 1H), 0.94-1.11 (m, 4H), 1.28-1.41 (m, 4H), 1.58 (d, J=6.82 Hz, 3H), 2.30-2.38 (m, 1H), 2.56 (s, 3H), 4.19 (dq, J=9.44, 6.87 Hz, 1H), 4.43 (q, J=7.07 Hz, 2H), 7.48 (s, 1H)

1. customThe solvent was removed in vacuo
2. customthe crude residue was purified via silica gel chromatography (eluent: gradient of 0 to 10% EtOAc:Hex)
3. customThe final product was collected as a solid, 0.722 g (76%)