反应详情

温度

50 °C

To a solution of 4-(6-iodo-3-methyl-1H-indazol-1-yl)pyrimidin-2-amine (170 mg, 0.38 mmol) in dry THF (3 mL) was introduced bis(triphenylphosphine)palladium(II) chloride (27 mg, 0.04 mmol), ethyl 2-hydroxy-2-methyl-4-(trimethylsilyl)but-3-ynoate (164 mg, 0.76 mmol) and TBAF (0.46 mL of a 1M solution in THF, 0.46 mmol). The solution was warmed to 50° C. for 1.5 hr. After cooling, sodium bicarbonate (4 mL of saturated aqueous NaHCO3) was introduced and the solution extracted with EtOAc (3×10 mL extractions). The combined organic extracts were washed with brine (10 mL), dried (Na2SO4), filtered and concentrated in vacuo. Purification by silica gel flash column chromatography (DCM containing a 1-10% gradient of methanol) furnished the title compound as an orange oil: 1H NMR (250 MHz, Chloroform-d) delta 1.39 (3H, t, J=7.1 Hz), 1.83 (3 H, s), 2.60 (3H, s), 4.38 (2H, q, J=7.1 Hz), 5.20 (2H, s), 7.29 (1H, s), 7.34 (1H, dd, J=8.2, 1.3 Hz), 7.60 (1H, dd, J=8.2, 0.7 Hz), 8.29 (1H, d, J=5.7 Hz), 8.83 (1H, s); LC-MS: m/z=+366.05 (M+H)+.

1. temperatureAfter cooling
2. extractionthe solution extracted with EtOAc (3×10 mL extractions)
3. washThe combined organic extracts were washed with brine (10 mL)
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customPurification by silica gel flash column chromatography (DCM containing a 1-10% gradient of methanol)