反应详情

温度

100 °C

The product from Example 311f (0.083 g, 0.138 mmol), potassium hydroxide (0.194 g, 3.46 mmol) and N,N,N-trimethylhexadecan-1-aminium bromide (2.52 mg, 6.92 μmol) were combined in dioxane (1.8 mL)/water (0.9 mL) and heated at 100° C. for 4 hours, cooled, and partitioned into ethyl acetate adjusting the pH to 7 with 1 M HCl. The organic layer was washed with saturated aqueous sodium chloride, dried (Na2SO4), filtered, and concentrated. Purification by chromatography (silica gel, 0-4% methanol in dichloromethane) afforded the title compound (0.035 g, 57%). 1H NMR (400 MHz, DMSO-d6) δ ppm 12.14 (s, 1H) 8.03 (dd, J=22.74, 2.29 Hz, 2H) 7.30-7.51 (m, 4H) 7.03-7.17 (m, 1H) 6.39 (d, J=2.14 Hz, 1H) 4.57 (s, 2H) 3.60 (s, 3H) 3.00 (s, 3H). MS (ESI+) m/z 446 [M+H]+.

1. temperaturecooled
2. custompartitioned into ethyl acetate adjusting the pH to 7 with 1 M HCl
3. washThe organic layer was washed with saturated aqueous sodium chloride
4. dry with materialdried (Na2SO4)
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification by chromatography (silica gel, 0-4% methanol in dichloromethane)