反应详情

温度

25 °C

To a solution of 0.88 g (3.17 mmol) of the methyl 3-hydroxy-3-isopropyl-7-phenylheptanoate in 30 mL of 1:1:1-THF:MeOH:H2O is added 1.08 g (25.36 mmol, 8 eq) of LiOH monohydrate and this is stirred at 25° C. for 1 month. This mixture is then acidified to pH=6 with 1 N HCl and then partitioned between ethyl acetate and water. The organics are dried (Na2SO4) and concentrated in vacuo to afford methyl 3-hydroxy-3-isopropyl-7-phenylheptanoic acid in the form of a pale yellow crystalline solid. (0.59 g, 70%): 1H-NMR (300 MHz, CDCl3) δ (TMS) 0.98(d, 6H), 1.35(m, 1H), 1.55(m, 5H), 2.1(m, 1H), 2.35(t, 1H), 2.6(t, 2H), 3.88(m, 1H), 6.08(bs, 2H), 7.15(m, 3H), 7.25(m, 2H).

1. custompartitioned between ethyl acetate and water
2. dry with materialThe organics are dried (Na2SO4)
3. concentrationconcentrated in vacuo