Methyl iodide → HCID 53363962, compound

Participants

Reaction Steps

At 0° C., to a solution of compound 68a (100 mg, 0.2 mmol) in 5 mL DMF was added sodium hydride (10 mg, 0.2 mmol), then iodomethane (77 mg, 0.4 mmol) was added to the reaction mixture and stirred at RT overnight. The mixture was quenched with a sat. NaHCO3 solution, extracted with ethyl acetate and dried with MgSO4. The solvent was removed under reduced pressure to yield a crude product, which was purified by column chromatography to obtain pure compound 71a. Yield: 61.3%. 1H NMR (500 MHz, DMSO-d6) δ 8.30 (s, 1H), 8.02 (d, 2H, J=8.0 Hz), 7.82 (s, 2H), 7.36 (br, 2H), 4.50 (s, 2H), 4.00 (s, 3H), 3.98 (s, 6H), 2.90 (d, br, 3H), 1.50 (s, 9H). MS (ESI) m/z 521.2 (M+Na)+, 496.9 (M−H)−.

Provenance & Evidence