反应详情

温度

2.5 °C

Add dropwise over 5 minutes isobutylmagnesium bromide (4.4 mL, 8.8 mmol, 2 M in diethyl ether) to a solution of lithium tetrachlorocuprate (4.4 mL, 0.44 mmol, 0.1 M in tetrahydrofuran) cooled to −35-40° C. Dissolve (2S)-(+)-glycidyl tosylate (1.674 g, 7.73 mmol) in tetrahydrofuran (8 mL), cool to −40° C. and cannulate into the stirring Grignard reaction flask. Quench with saturated aqueous ammonium chloride (25 mL), pour supernate into saturated aqueous ammonium chloride (25 mL) and water and shake well. Wash with saturated aqueous sodium chloride, dry (magnesium sulfate), filter, concentrate and purify (silica gel chromatography, eluting with 10:90 to 25:75 ethyl acetate:hexanes) to give the desired compound (1.6711 g, 75%).

1. customcannulate into the stirring Grignard reaction flask
2. customQuench with saturated aqueous ammonium chloride (25 mL)
3. additionpour supernate into saturated aqueous ammonium chloride (25 mL) and water
4. washWash with saturated aqueous sodium chloride
5. dry with materialdry (magnesium sulfate)
6. filtrationfilter
7. concentrationconcentrate
8. custompurify
9. wash(silica gel chromatography, eluting with 10:90 to 25:75 ethyl acetate:hexanes)