反应详情

To a solution of 1 g of ethyl 3-bromo-1H-pyrrolo[2,3-c]pyridine-2-carboxylate in 100 mL of dioxane are added 773 mg of 4-aminophenylboronic acid hydrochloride and 1.1 g of potassium fluoride in 9 mL of water. The reaction mixture is stirred under an argon atmosphere for 15 minutes. 425 mg of tetrakis(triphenylphosphine)palladium(0) and 630 μL of triethylamine are added. The reaction mixture is stirred for 17 hours at reflux. After treating with carbon black and then filtering through Celite®, the filtrate is concentrated under reduced pressure. The residue is purified by flash chromatography on a column of silica (60; 35-70 μM), eluting with a mixture of dichloromethane, methanol and acetonitrile (90/5/5 by volume). 600 mg of ethyl 3-(4-aminophenyl)-1H-pyrrolo[2,3-c]pyridine-2-carboxylate are obtained, the characteristics of which are as follows:

1. stirringThe reaction mixture is stirred for 17 hours
2. temperatureat reflux
3. filtrationfiltering through Celite®
4. concentrationthe filtrate is concentrated under reduced pressure
5. customThe residue is purified by flash chromatography on a column of silica (60; 35-70 μM)
6. washeluting with a mixture of dichloromethane, methanol and acetonitrile (90/5/5 by volume)