Dimethylformamide → 2-(5,6-Dichloro-2-(triethylsilyl)-1H-indol-3-yl)ethanol

Beteiligte Stoffe

Reaktionsschritte

2-(5-chloro-2-(triethylsilyl)-1H-pyrrolo[2,3-b]pyridin-3-yl)ethanol was prepared according to method D Step II with 5-chloro-3-iodopyridin-2-amine (2 g; 7.86 mmol), 4-(triethylsilyl)but-3-yn-1-ol (4.35 g; 23.58 mmol); (1,1′-bis(diphenylphosphino)ferrocene)-dichloromethane (0.321 g; 0.393 mmol), lithium chloride (0.333 g; 7.86 mmol) and sodium carbonate (1.67 g; 15.72 mmol) in DMF (15 mL) for approximately 20 hours. The crude material was purified by flash chromatography on silica gel (eluent 2 to 20% ethyl acetate in heptane) to afford 1.44 g (79%) of 2-(5,6-dichloro-2-(triethylsilyl)-1H-indol-3-yl)ethanol as a brown oil. The crude material was purified by flash chromatography on silica gel (eluent 7 to 80% of ethyl acetate in heptane) to give 2.15 g (88%) of 2-(5-chloro-2-(triethylsilyl)-1H-pyrrolo[2,3-b]pyridin-3-yl)ethanol as a white solid.

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