反应详情

A stirred solution of (RS)-4-(4-iodo-phenyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (200 mg, example 1(e)), zinc cyanide (66 mg) and tetrakis(triphenyl-phosphine)palladium (57 mg) in DMF (4 ml) under an argon atmosphere in a sealed tube was heated at 160° C. for 15 minutes under microwave irradiation. The mixture was then poured onto ice-water and the mixture extracted twice with ethyl acetate. The combined organic extracts were washed with water, dried over sodium sulphate and concentrated in vacuo. The residue was purified by column chromatography (SiO2; gradient: heptane/EtOAc) to give (RS)-4-(4-cyano-phenyl)-2,2-dimethyl-oxazolidine-3-carboxylic acid tert-butyl ester (82 mg, 55%) as a colourless viscous oil. MS (ISP): 325.4 ([M+Na]+), 303.4 ([M+H]+), 247.3 ([M+H—C4H8]+).

1. additionThe mixture was then poured onto ice-water
2. extractionthe mixture extracted twice with ethyl acetate
3. washThe combined organic extracts were washed with water
4. dry with materialdried over sodium sulphate
5. concentrationconcentrated in vacuo
6. customThe residue was purified by column chromatography (SiO2; gradient: heptane/EtOAc)