Sodium hydride → 3-(4-methoxybenzyl)-1H-pyrrolo[3,2-f]quinoline-1,2(3H)-dione

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Reaction Steps

To a stirred solution of 1H-pyrrolo[3,2-f]quinoline-1,2(3H)-dione (Bramson, H. N. et al. J. Med. Chem. 2001, 44 (25):4339-4358) (0.15 g, 0.76 mmol) in dry N,N-dimethylformamide (10 mL) was added sodium hydride (60% in mineral oil, 0.04 g, 0.98 mmol) at ambient temperature. The mixture was stirred at ambient temperature for 1 h and 4-methoxybenzyl bromide (0.16 mL, 1.1 mmol) was added. The mixture was stirred at ambient temperature for 16 h and was diluted with water (100 mL) and ethyl acetate (100 mL). The layers were separated and the aqueous layer was extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with brine (50 mL), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with a 50% to 65% gradient of ethyl acetate in hexanes to afford 3-(4-methoxybenzyl)-1H-pyrrolo[3,2-f]quinoline-1,2(3H)-dione (0.20 g, 82%) as a red solid: MS (ES+) m/z 319.0 (M+1).

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