反应详情

温度

75 °C

To a solution of 3-(3-benzyloxy-2-oxo-propyl)-5-methyl-1,3,4-oxadiazol-2-one (36.4 g, 139 mmol) in isopropanol (140 mL) was added hydrazine hydrate (62 wt % in water, 11.8 mL, 152 mmol) in at room temperature in one portion. The mixture was heated to 75° C. for 24 h. The volatiles were removed under reduced pressure, and the remaining brown oil was purified by flash chromatography (7% MeOH/dichloromethane) to furnish the desired product as a yellowish solid. 1H NMR (400 MHz, CDCl3) 2.04 (s, 3H), 4.12 (s, 2H), 4.23 (s, 2H), 4.54 (s, 2H), 7.24-7.44 (m, 5H), 8.25 (s, 1H), 8.69 (s, 1H).

1. customThe volatiles were removed under reduced pressure
2. customthe remaining brown oil was purified by flash chromatography (7% MeOH/dichloromethane)