Thalidomide → 2-(1-(2-Hydroxyethyl)-2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione

Participants

Reaction Steps

2-(2,6-Dioxopiperidin-3-yl)isoindoline-1,3-dione (2.5 g) was dissolved in DMF (dry, 60 mL). 95% NaH (0.24 g) was added. The mixture was stirred for 30 minutes at room temperature. Then, chloroethanol (0.68 mL) was added, and the mixture was stirred over night at room temperature. The reaction mixture was diluted with 300 mL of water and extracted with ethyl acetate (3×60 mL). Organic phases were combined and washed twice with water, and once with brine, then dried over anhydrous magnesium sulfate. Rotary evaporation of solvent yielded crude product, which was purified by silica gel column chromatography (acetic ether:petroleum ether=1:1) to yield 1.1 g of pure title product. 1H NMR (CDCl3, ppm) δ 7.88-7.90 (m, 2H), 7.77-7.79 (m, 2H), 5.06 (dd, 1H, J=5.6, 12.4 Hz), 4.02-4.12 (m, 2H), 3.76-3.80 (m, 2H), 2.94-3.02 (m, 1H), 2.72-2.90 (m, 2H), 2.29-2.31 (m, 1H), 2.14-2.23 (m, 1H).

Provenance & Evidence