Sodium hydride → HCID 58031619, compound

Participants

Reaction Steps

To a stirred suspension of ethyl 3-methyl-5-(2-oxoimidazolidin-1-yl)thiophene-2-carboxylate (0.85 g, 3.33 mmol) in anhydrous N,N-dimethylformamide (8 mL) under nitrogen atmosphere was added in one portion sodium hydride (60% in mineral oil, 0.16 g, 4.00 mmol). The resulting reaction mixture was stirred at ambient temperature for 1 h, and then (2-bromoethoxy)(tert-butyl)dimethylsilane (0.86 mL, 4.01 mmol) was added. The resulting reaction mixture was stirred at ambient temperature for 16 h, and then partitioned between ethyl acetate (100 mL), water (35 mL) and brine (35 mL). The aqueous layer was extracted with ethyl acetate (100 mL), and the combined organic layer was dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with 0-30% ethyl acetate in hexanes to afford the title compound as a colorless solid in 79% yield (1.09 g): 1H NMR (300 MHz, CDCl3) δ 6.13 (s, 1H), 4.26 (q, J=7.1 Hz, 2H), 3.85-3.69 (m, 6H), 3.41 (t, J=5.2 Hz, 2H), 2.49 (s, 3H), 1.33 (t, J=7.1 Hz, 3H), 0.89 (s, 9H), 0.06 (s, 6H): MS (ES+) m/z 413.4 (M+1).

Provenance & Evidence