HCID 58027707、化合物 → HCID 20977333、化合物

To a stirred solution of the nitrile 21.16 (25.0 g, 153 mmol) in THF, cooled to 0° C., was added BH3-DMS (49.5 mL, 460 mmol), following which the cooling bath was removed. The resulting mixture was boiled under reflux overnight, cooled in an ice-bath and quenched by the slow addition of large excess of MeOH. After stirring at room temperature for 2 h, the excess solvent was removed under reduced pressure. The residue was again treated with MeOH and evaporated. The process was repeated three times. The brown oil was then applied onto a flash silica gel column and eluted (0 to 15% (9:1 MeOH—NH3)-DCM gradient) to give 3-(3-amino-1-hydroxypropyl)phenol (21.17) as a brown solid. Yield (25.0 g, 97%); 1H NMR (400 MHz, DMSO-d6) δ 7.04-7.09 (m, 1H), 6.74 (s, 1H), 6.70 (d, J=7.6 Hz, 1H), 6.58 (dd, J=8.0, 2.0 Hz, 1H), 4.55 (dd, J=7.2, 5.6 Hz, 1H), 2.57-2.66 (m, 2H), 1.56-1.62 (m, 2H).