Succinic anhydride → Succinic acid Fluorenylmethyl Ester

関与物質

反応手順

Fluorenylmethanol (0.90 g, 4.5 mmol) and dimethylaminopyridine (50 mg) were dissolved in 10 ml dry pyridine. Succinic anhydride (0.50 g, 5.0 mmol) was added and the solution stirred overnight. The solvent was removed under reduced pressure, sodium bicarbonate added (50 ml), the solution extracted with ethyl acetate (50 ml), and the organic layer discarded. The aqueous layer was acidified to pH 2, extracted with ethyl acetate (2×100 ml), washed with brine, and the solvent removed under reduced pressure. The residue was purified by flash chromatography (ethyl acetate/hexane 2:1 as eluant) to give 0.86 g product (2.9 mmol, 64%). 1H NMR: (CDCl3, 200 MHz) δ7.8-7.26 (8H, m, ArH), 4.43 (2H, d, J=6.5 Hz, CHCH2OCO), 4.23 (1H, t, J=6.5 Hz, CHCH2OCO), 2.70 (4H, s, OCOCH2CH2COO).

情報源と証拠