1,3-Dimethylimidazolium Iodide → 1-(3-Hydroxyethoxy-benzoyl)-6,7-dimethoxy-isoquinoline-4-carbonitrile

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Reaction Steps

Sodium hydride (11 mg, 0.26 mmol) was added to a stirred mixture of 1-Bromo-6,7-dimethoxy-isoquinoline-4-carbonitrile (see example 82) (50 mg, 0.17 mmol), 3-(2-hydroxyethoxy)-benzaldehyde (43 mg, 0.26 mmol), 1,3-dimethylimidazolium iodide (16 mg, 0.26 mmol) in DMF (2 mL). The reaction mixture became dark color. After 1 h, water (4 mL) was added to the above mixture, and extracted with chloroform (6 mL). The extract was washed with water (4 mL), dried over sodium sulfate, filtered and concentrated in vacuo to afford a solid. Flash chromatography (Merck Silica gel 60, 70–230 mesh, 0–40% EtOAc in methylenechloride in 30 min) afforded 1-(3-hydroxyethoxy-benzoyl)-6,7-dimethoxy-isoquinoline-4-carbonitrile (31 mg, 41%) as a white solid. LC-MS m/e calcd for C21H18N2O5 (MH+) 379, found 379.

Provenance & Evidence