Methyl iodide → 4-Chloro-2-methyl-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridine

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Reaction Steps

To a solution of 4-chloro-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrrolo[2,3-b]pyridine (150 mg, 0.53 mmol) in THF (1 mL) at −78° C. under argon was added butyllithium (0.4 mL, 1.6 M in hexanes, 6.4 mmol) dropwise. The mixture was stirred at the same temperature for 5 min, and treated with iodomethane (0.1 mL). The mixture was warmed up to room temperature, quenched by the addition of saturated ammonium chloride solution, and extracted with ethyl acetate (3×10 mL). The combined extracts were washed with brine, dried (MgSO4) and concentrated in vacuo to give the crude product (150 mg, 95%), which was used for the next reaction. 1H NMR (CDCl3) δ 8.19 (d, 1H, J=5.5 Hz), 7.14 (d, 1H, J=5.5 Hz), 6.42 (s, 1H), 5.74 (s, 2H), 3.60 (t, 2H, J=6.8 Hz), 2.61 (s, 3H), 0.96 (t, 2H, J=6.8 Hz), 0.07 (s, 9H); MS(ESI+) m/z 297 and 299 (M+H, 1 Cl)+.

Provenance & Evidence