1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-{2-[2-(2-Methoxy-ethoxy)-ethoxy]-ethoxy}-butyric acid 2,5-dioxo-pyrrolidin-1-yl ester

関与物質

反応手順

N-hydroxysuccinimide (0.55 g, 4.8 mmol) and EDCI (1.15 g, 6.0 mmol) were dissolved in CH2Cl2 (7 mL). Then 4-{2-[2-(2-Methoxy-ethoxy)-ethoxy]-ethoxy}-butyric acid (0.940 g, 3.8 mmol), dissolved in CH2Cl2 (2 mL), was added. Reaction stirred overnight at room temperature. Crude reaction was diluted with CH2Cl2 (21 mL), washed 1M HCl (30 mL), H2O (30 mL), dried MgSO4, and evaporated to dryness. Column chromatography (Silica, ethyl acetate) afforded 4, a clear oil (0.556 g, 43% yield).

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