反应详情

温度

20 °C

2.16 g of N-[1(S)-benzyl-3-hydroxy-2(R)-(methylsulphonyloxy)propyl]phthalimide were added to a stirred suspension of 200 mg of sodium hydride (80% dispersion in mineral oil) in 50 ml of dry tetrahydrofuran and the mixture was stirred at 20° C. for 2 hours. A further 100 mg of sodium hydride were added and the stirring was continued for 3.5 hours. The mixture was diluted with dichloromethane and water and the pH of the aqueous layer was adjusted to 7 by adding 2M hydrochloric acid. The organic layer was separated, washed with saturated sodium chloride solution and evaporated. The residue was chromatographed on silica gel using ethyl acetate/n-hexane (1:2) for the elution to give 0.67 g of 2(S)-[2-phenyl-1(S)-phthalimidoethyl]oxirane as a white solid, MS: m/e 294 [M+H]+.

1. waitthe stirring was continued for 3.5 hours
2. customThe organic layer was separated
3. washwashed with saturated sodium chloride solution
4. customevaporated
5. customThe residue was chromatographed on silica gel
6. washfor the elution