反应详情

1.43 g (3.42 mmole) of simvastatin lactone was dissolved in 10 mL acetonitrile and treated with water (5 mL) and sodium hydroxide (151 mg, 3.78 mmole). The reaction was stirred at room temperature for 3 days, at which time analytical thin-layer chromatography using 4:1 methylene chloride:acetone eluent indicated essentially complete conversion of the starting lactone to a more polar product. The reaction mixture was then diluted to 50 mL with 1:1 acetonitrile:water, frozen and lyophilized to afford 1.22 g (2.66 mmole, 77.8%) of simvastatin sodium as a fluffy white solid. The 400 MHz 1H nuclear magnetic resonance (NMR) spectrum was consistent with the sodium carboxylate product. 1H NMR (Me2SO-d6) δ 7.6 (br s, 1H), 5.95 (d, 1H), 5.8 (in, 1H), 5.5 (s, 1H), 5.1 (s, 1H), 4.6 (s, 1H), 3.7 (br s, 1H), 3.5 (br s, 1H), 2.3 (m, 2H), 2.2 (d, 1H), 2.0 (m, 2H), 1.8 (m, 2H), 1.6–1.3 (5H), 1.2 (br s, 3H), 1.0 (9H), 0.80 (m, 3H), 0.75 (m, 3H).