Methyl iodide → HCID 86706945, compound

Participants

Reaction Conditions

Reaction Steps

To a −78° C. solution of 4-chloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (C1) (15.0 g, 36.6 mmol) in tetrahydrofuran (500 mL) was added lithium diisopropylamide (2 M solution in heptane/tetrahydrofuran/ethylbenzene, 183 mL, 366 mmol), and the reaction mixture was stirred at −20° C. for 2 hours, then re-cooled to −78° C. Iodomethane (52.1 g, 367 mmol) was added at −78° C., and the reaction mixture was allowed to stir at −20° C. for 2 hours. Saturated aqueous ammonium chloride solution was added, and the mixture was extracted with ethyl acetate (3×500 mL). The combined organic layers were washed with water (100 mL) and with saturated aqueous sodium chloride solution (100 mL), dried over sodium sulfate, filtered, and concentrated in vacuo. Purification via chromatography on silica gel (Eluent: 10:1 petroleum ether/ethyl acetate) afforded the product as a yellow oil. Yield: 10 g, 24 mmol, 66%. LCMS m/z 424.1 [M+H+]. 1H NMR (400 MHz, CDCl3) δ 8.58 (s, 1H), 5.69 (s, 2H), 3.48-3.54 (m, 2H), 2.60 (s, 3H), 0.88-0.95 (m, 2H), −0.05 (s, 9H).

Provenance & Evidence