反应详情

温度

55 °C

A solution of 2-{4-[2-(2-biphenyl-4-yl-5-methyloxazol-4-yl)-ethoxy]-2-cyclohexylmethyl-phenoxy}-2-methyl-propionic acid ethyl ester (0.54 mmol) in ethanol (10 mL) was treated with 2.5 N aqueous NaOH (0.4 mL), and heated at 55° C. for 2 h. The reaction was cooled to ambient temperature and concentrated down to near dryness. The residue was then diluted with ethyl acetate (40 mL) and water (20 mL) and acidified to pH 1 with 1N aqueous HCl. The organic layer was washed with brine (20 mL), dried (Na2SO4) and concentrated in vacuo to give 2-{4-[2-(2-biphenyl-4-yl-5-methyloxazol-4-yl)-ethoxy]-2-cyclohexylmethyl-phenoxy}-2-methyl-propionic acid. 1H NMR (400 MHz, CDCl3) δ 8.03-8.05 (m, 2H), 7.67 (d, 2H, J=8.8 Hz) 7.62 (d, 2H, 6.8 Hz), 7.47-7.43 (m, 2H), 7.35-7.39 (m, 1H, J=8.8 Hz), 6.67 (d, 1H, J=29 Hz), 6.62 (dd, 1H, J=8.8 Hz, J=2.9 Hz), 4.18 (t, 2H, J=6.4 Hz), 3.00 (t, 2H, J=6.4 Hz), 2.40 (s, 3H), 1.62-1.66 (m, 5H), 1.53 (s, 6H), 1.25 (s, 2H), 1.13-1.18 (m, 4H), 0.85-0.97 (m, 2H), MS (ES) m/e 554.2 (M+1).

1. temperatureThe reaction was cooled to ambient temperature
2. concentrationconcentrated down to near dryness
3. additionThe residue was then diluted with ethyl acetate (40 mL) and water (20 mL)
4. washThe organic layer was washed with brine (20 mL)
5. dry with materialdried (Na2SO4)
6. concentrationconcentrated in vacuo