Diisopropylamine → HCID 86706964, compound

Participants

Reaction Conditions

Reaction Steps

A solution of diisopropylamine (2.9 g, 29 mmol) in tetrahydrofuran (30 mL) was cooled to −78° C. and treated drop-wise with n-butyllithium (2.5 M, 11.6 mL, 29 mmol). The reaction mixture was stirred at 0° C. for 1 hour, and then cooled to −78° C. A solution of 4-chloro-5-iodo-7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidine (C1) (8.0 g, 20 mmol) in tetrahydrofuran (10 mL) was added drop-wise, and stirred was continued at −78° C. for 1 hour. After drop-wise addition of a solution of ethyl formate (2.6 g, 35 mmol) in tetrahydrofuran (10 mL) to the −78° C. reaction mixture, it was allowed to warm to room temperature and stir for 18 hours. It was then cooled to 0° C., and the reaction was quenched by addition of saturated aqueous ammonium chloride solution (20 mL), then extracted with ethyl acetate (3×50 mL). The combined organic layers were washed with saturated aqueous sodium chloride solution (50 mL), dried over sodium sulfate, filtered, and concentrated. Purification via silica gel chromatography (Gradient: 0% to 25% ethyl acetate in petroleum ether) afforded the product as a yellow oil. Yield: 5.0 g, 11 mmol, 55%. 1H NMR (400 MHz, CDCl3) δ 10.11 (s, 1H), 8.80 (s, 1H), 6.05 (s, 2H), 3.55-3.62 (m, 2H), 0.89-0.96 (m, 2H), −0.05 (s, 9H).

Provenance & Evidence