反应详情

温度

0 °C

A 5 L 3-neck round bottom flask was charged with trityl chloride (133.8 g, 0.48 mol) and methylene chloride (400 ml). It was cooled to 0° C. under N2 and treated with triethylamine (70.7 g, 0.70 mol). After an hour of stirring at 0° C., a solution of (R)-glycidol (88% ee, 37.03 g, 0.5 mol) in methylene chloride (100 ml) was added over 0.75 hour. The resulting solution was allowed to warm to ambient temperature and was stirred for 3 hours. It was then filtered, and the filtrate was washed with water (2×500 ml) and brine (2×500 ml). The organic phase was dried over MgSO4 and concentrated to a foam, which on crystallization from isopropyl alcohol gave the title compound (116.2 g, 76.5%) as an off-white powder.

1. temperatureto warm to ambient temperature
2. stirringwas stirred for 3 hours
3. filtrationIt was then filtered
4. washthe filtrate was washed with water (2×500 ml) and brine (2×500 ml)
5. dry with materialThe organic phase was dried over MgSO4
6. concentrationconcentrated to a foam, which on crystallization from isopropyl alcohol