反应详情

Sodium hydride (60% dispersion in mineral oil, 1750 mg, 43.80 mmol, 1.0 equiv) was added slowly to a stirred solution of Bisphenol A (10000 mg, 43.80 mmol, 1 equiv) in anhydrous dimethyl formamide (30 mL), at room temperature, and the contents were stirred under an atmosphere of argon for 20 min. (R)-(+)-4-chloromethyl-2,2-dimethyl-1,3-dioxolane 98% (7.10 mL, 52.56 mmol, 1.2 equiv) was added via syringe and the mixture was allowed to react at 70-80° C. for 40 h. Then, the reaction was quenched by the addition of a saturated solution of ammonium chloride (10 mL), and the mixture was extracted with ethyl acetate (3×20 mL). The organic layer was washed with deionized water (25 mL), dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The resulting residue was purified by flash column chromatography on silica gel (eluent: 10% ethyl acetate in hexane) to provide the title compound (3560 mg, 24%, 25-30% conversion) as a foam.

1. additionwas added via syringe
2. customto react at 70-80° C. for 40 h
3. customThen, the reaction was quenched by the addition of a saturated solution of ammonium chloride (10 mL)
4. extractionthe mixture was extracted with ethyl acetate (3×20 mL)
5. washThe organic layer was washed with deionized water (25 mL)
6. dry with materialdried over anhydrous magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customThe resulting residue was purified by flash column chromatography on silica gel (eluent: 10% ethyl acetate in hexane)