Sodium hydride → HCID 59699736, compound

Participants

Reaction Steps

Under nitrogen 755 mg (2.49 mmol) of 5-bromo-3-(2-methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridine was dissolved in 30 ml of anhydrous THF. 200 mg of sodium hydride were added and the resulting mixture was stirred at ambient temperature for 4 h. 0.5 ml of (2-methoxy-ethoxy)methyl chloride was added and the resulting mixture stirred at room temperature for 72 h. 0.75 ml of (2-methoxy-ethoxy)methyl chloride and an excess of sodium hydride were added and the reaction mixture allowed to stir at ambient temperature for am additional 4 h. 250 mg of tetra-n-butylammonium iodide were added and the reaction mixture stirred for 2 h at room temperature. The reaction was then quenched by addition of methanol and distributed between a saturated aqueous solution of ammonium chloride and dichloromethane. The aqueous phase was extracted with pyridinepethane and the combined organic phases dried over sodium sulfate and evaporated. The crude was then purified by chromatorgraphy on silica gel using a gradient of ethyl acetate in hexanes to afford 922 mg (2.36 mmol, 95% yield) of 5-bromo-1-(2-methoxy-ethoxymethyl)-3-(2-methoxy-phenyl)-1H-pyrrolo[2,3-b]pyridine as a yellow oil. 1H-NMR (d6-DMSO): δ 8.40 (d, J=1.9 Hz, 1H), 8.17 (d, J=1.9 Hz, 1H), 7.97 (s, 1H), 7.52 (dd, J=1.3 Hz, 7.3 Hz, 1H), 7.34 (dd, J=1.4 Hz, 8.7 Hz, 1H), 7.15 (d, J=8.2 Hz 1H), 7.06 (t, J=7.3 Hz, 1H), 5.71 (s, 2H), 3.83 (s, 3H), 3.57 (m, 2H), 3.41 (m, 2H), 3.20 (s, 3H); MS: m/z 315, 317 [MH+-MeOC2H4O].

Provenance & Evidence