反应详情

温度

65 °C

A mixture of 4-chloropicolinic acid isopropyl ester (1.5 g, 7.5 mmol), 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrrolo[3,2-b]pyridine (1.83 g, 7.5 mmol), dppf(Pd)Cl2 (270 mg, 5 mol %), and potassium carbonate (2.0 g, 15 mmol) in degassed toluene (8 mL), degassed water (4 mL) and degassed isopropanol (4 mL) was heated at 65° C. for 2 hours. The aqueous phase was discarded and the solvent removed under reduced pressure. The residue was purified by flash chromatography (rf: 0.41 in 20:1 ethyl acetate:methanol) to provide isopropyl 4-(1H-pyrrolo[3,2-b]pyridin-6-yl)picolinate (1.20 g, 57%) as a yellow powder. 282.1 (M+1).

1. customdegassed water (4 mL)
2. customdegassed isopropanol (4 mL)
3. customthe solvent removed under reduced pressure
4. customThe residue was purified by flash chromatography (rf: 0.41 in 20:1 ethyl acetate:methanol)