反应详情

To a solution of 7-[(1-{4-[(4-butylphenyl)ethynyl]phenyl}pentyl)oxy]-2,2-dimethyl-4H-1,3-benzodioxin-4-one (370 mg, 0.74 mmol) in EtOH (10 mL) was added an aqueous solution of NaOH (0.75 mL, 3.75 mmol, 5N) and the resulting mixture was stirred overnight at rt. An aqueous solution of HCl (10 mL, 1N) was added and the resulting reaction mixture was extracted with Et2O (3×). The combined organic layers were washed with water and brine, dried over MgSO4 and the solvents were removed under reduced pressure to give 320 mg (94%) of the title compound as a colorless oil. HPLC, Rt: 6.8 min (purity: 99.8%). LC/MS, M−(ESI): 455.3. 1H NMR (CDCl3) δ:10.5 (s, 1H); 9.66 (brs, 1H), 7.72 (d, J=9.0 Hz, 1H), 7.48 (d, J=8.3 Hz, 2H), 7.41 (d, J=8.3 Hz, 2H), 7.28 (d, J=8.3 Hz, 2H), 7.15 (d, J=8.3 Hz, 2H), 6.45 (dd, J=2.3 Hz, J=9.0 Hz, 1H), 6.35 (d, J=2.3 Hz, 1H), 5.14 (t, J=7.8 Hz, 1H), 2.61 (t, J=7.9 Hz, 2H), 2.09-1.93 (m, 1H), 1.90-1.75 (m, 1H), 1.66-1.75 (m, 1H), 1.66-1.19 (m, 8H), 0.96-0.84 (m, 6H).

1. customthe resulting reaction mixture
2. extractionwas extracted with Et2O (3×)
3. washThe combined organic layers were washed with water and brine
4. dry with materialdried over MgSO4
5. customthe solvents were removed under reduced pressure