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 3N 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 (TFA salt), 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