反应详情

温度

55 °C

Under nitrogen, 2-{3-[2-(2-biphenyl-3-yl-5-methyloxazol-4-yl)ethoxy]phenoxy}-2-methylpropionic acid ethyl ester (0.53 mmol) in ethanol (2.5 mL) and THF (2.5 mL) was treated with 2.0 N NaOH (2.0 mL). The reaction mixture was stirred at 55° C. for 1 h and concentrated in vacuo. The resulting slurry was suspended in ethyl acetate, acidified to pH 1 with 1N HCl, and partitioned. The organic layer was washed with brine, dried (Na2SO4), and concentrated in vacuo to provide the desired product. mp 67-71° C.; Rf=0.09 in 60% ethyl acetate/hexanes; 1H NMR (400 MHz, CDCl3) δ8.22 (s, 1H), 7.91 (d,J=7.2 Hz, 1H), 7.65-7.63 (m, 3H), 7.51-7.41 (m, 3H), 7.35 (t, J=7.2 Hz, 1H), 7.13 (t, J=8.0 Hz, 1H), 6.72 (s, 1H), 6.38 (d, J=8.0 Hz, 1H), 6.53 (d, J=8.0 Hz), 4.19 (t, J=7.4 Hz, 2H), 2.92 (t, J=7.4 Hz, 2H), 2.36 (s, 3H), 1.58 (s, 6H); MS (EI) 479.9 (M+Na)+, 457.9 (M+H)+.

1. concentrationconcentrated in vacuo
2. custompartitioned
3. washThe organic layer was washed with brine
4. dry with materialdried (Na2SO4)
5. concentrationconcentrated in vacuo