反应详情

温度

60 °C

The solution of 10.0 g of 2-(2-methoxyphenyl)ethanol in 130 ml of dimethyl sulphoxide is admixed with stirring with sodium hydride dispersion (60%) and stirred at 60° C. over 10 min. The suspension is admixed slowly with 6.20 g of chloroacetic acid and subsequently stirred at 80° C. over 2 hours. The reaction mixture is cooled, poured onto ice-water (0.5 l) and washed with ethyl acetate (1×250 ml). The aqueous phase is acidified with 2M HCl and extracted with ethyl acetate (2×250 ml). The organic phases are washed successively with water (250 ml) and brine (1×250 ml), dried over sodium sulphate, filtered and concentrated. The title compound is obtained as a slightly yellowish oil from the residue by means of flash chromatography (SiO2 60F). Rf=0.04 (200:20:1 dichloromethane-methanol-conc. ammonia); Rt=3.44.

1. stirringsubsequently stirred at 80° C. over 2 hours
2. temperatureThe reaction mixture is cooled
3. additionpoured onto ice-water (0.5 l)
4. washwashed with ethyl acetate (1×250 ml)
5. extractionextracted with ethyl acetate (2×250 ml)
6. washThe organic phases are washed successively with water (250 ml) and brine (1×250 ml)
7. dry with materialdried over sodium sulphate
8. filtrationfiltered
9. concentrationconcentrated