反应详情

To an ice-bath cooled THF (100 mL) solution of the product from step 1 (2 g, 9.26 mmol) were added NaBH4 (0.81 g, 21.3 mmol), and I2 (2.3 g, 9.26 mmol), and the mixture stirred for 30 min. The reaction mixture was then heated at reflux for 3 h, and then allowed to cool to room temperature. After cooling to 0° C., the reaction mixture was acidified by slow addition of 3 N HCl (1 mL). The reaction mixture was concentrated in vacuo and the crude product purified by reverse phase HPLC to give the title compound as a solid (0.5 g, 25%). LCMS E-S (M+H)=221.1. 1H NMR (400 MHz, DMSO-d6) δ ppm 11.8-11.9 (br s, 1H), 7.80-7.93 (br s, 3H), 6.07 (s, 1H), 3.69 (s, 2H), 2.67-2.75 (m, 1H), 2.17 (s, 3H), 1.58-1.72 (m, 5H), 1.19-1.41 (m, 5H).

1. temperatureThe reaction mixture was then heated
2. temperatureat reflux for 3 h
3. temperatureAfter cooling to 0° C.
4. concentrationThe reaction mixture was concentrated in vacuo
5. customthe crude product purified by reverse phase HPLC