反应详情

To a solution of ethyl 2-methyl-1H-indole-3-carboxylate (2 g, 6.15 mmol), Pd(PPh3)-4(0.36 g, 0.31 mmol) in dioxane (20 mL) was added Me3Al (2 M in THF, 7.69 ml, 15.37 mmol) under N2. The mixture was stirred at reflux overnight. After the complete of the reaction, the reaction was quenched by addition of 5 mL of water and extracted with EtOAc. The extractions were combined, washed with H2O, dried over Na2SO4, and concentrated under vacuum. The residue was purified by flash column (Eluent: PE/EtOAc=15:1) to give ethyl 3,5-dimethylisonicotinate as a yellow solid. (0.9 g, yield 78%). LRMS (M+H+) m/z: calcd 180.2. found 179.01.

1. temperatureat reflux overnight
2. customAfter the complete of the reaction
3. customthe reaction was quenched by addition of 5 mL of water
4. extractionextracted with EtOAc
5. extractionThe extractions
6. washwashed with H2O
7. dry with materialdried over Na2SO4
8. concentrationconcentrated under vacuum
9. customThe residue was purified by flash column (Eluent: PE/EtOAc=15:1)