Dichloromethane → HCID 59481291, compound

Participants

Reaction Steps

To a stirred solution of ethyl 5-(3-(2-hydroxyethyl)-2-oxoimidazolidin-1-yl)-3-methylthiophene-2-carboxylate (0.61 g, 2.04 mmol) in dichloromethane (6 mL) and pyridine (0.25 mL) at 0° C. was added toluenesulfonyl chloride in dichloromethane (1 mL). The resulting mixture was allowed to warm to ambient temperature, stirred for 18 h and diluted with dichloromethane (100 mL). The organic layer was washed sequentially with 10% aqueous hydrochloric acid (2×50 mL) and saturated aqueous sodium bicarbonate solution (50 mL), dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with 0-10% ethyl acetate in dichloromethane to afford the title compound as a colorless solid in 56% yield (0.52 g): 1H NMR (300 MHz, CDCl3) δ 7.77 (d, J=8.1 Hz, 2H), 7.31 (d, J=8.1 Hz, 2H), 6.11 (s, 1H), 4.31-4.20 (m, 4H), 3.77-3.61 (m, 4H), 3.54 (t, J=4.8 Hz, 2H), 2.49 (s, 3H), 2.36 (s, 3H), 1.33 (t, J=7.1 Hz, 3H); MS (ES+) m/z 453.3 (M+1).

Provenance & Evidence