Iodoethane → 2-(1-(2-hydroxyethyl)-2,6-dioxopiperidin-3-yl)isoindolin-1,3-dione (S)-2-(diethylamino)-3-methylbutanoate

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Reaction Conditions

Reaction Steps

2-(1-(2-hydroxyethyl)-2,6-dioxopiperidin-3-yl)isoindolin-1,3-dione (S)-2-amino-3-methylbutanoate (92 mg) was dissolved in acetonitrile (18 mL). Ethyl iodide (74 mg) was added. The mixture was stirred at 80° C. and allowed to react overnight. The solvent was removed by rotary evaporation in vacuo. White solid (30 mg) was obtained after the crude product was purified by silica gel column (eluted with acetic ether:petroleum ether=1:1). 1H NMR (CDCl3, ppm) δ 7.86-7.90 (m, 2H), 7.76-7.79 (m, 2H), 4.97-5.08 (m, 1H), 4.38-4.43 (m, 1H), 4.05-4.30 (m, 3H), 3.15-3.25 (m, 1H), 2.95-3.05 (m, 1H), 2.80-2.95 (m, 2H), 2.45-2.58 (m, 4H), 2.10-2.20 (m, 1H), 1.90-2.10 (m, 2H), 1.00-1.20 (m, 7H), 0.95-0.98 (m, 3H), 0.87-0.91 (m, 3H).

Provenance & Evidence