反应详情

8.15 g (0.12 mol) of sodium ethylate in 30 ml of ethanol were added dropwise to a solution of 24.8 g (0.1 mol) of 3-bromo-3-cyano-2,2-dimethyl-propane-1-carboxylic acid ethyl ester in 50 ml of ethanol. The mixture was subsequently stirred at 50°-60° C. for 3 hours. 200 ml of water were then added and the reaction mixture was neutralized with HCl and extracted twice with 50 ml of methylene chloride each time. The combined methylene chloride extracts were washed twice with 50 ml of H2O each time, dried over Na2SO4 and then concentrated. The residue was fractionated. 11.5 (69% theory) of 2-cyano-3,3-dimethyl-cyclopropane-1-carboxylic acid ethyl ester were obtained in the form of a colorless oil of boiling point 68°-72° C./2 mm Hg.

1. extractionextracted twice with 50 ml of methylene chloride each time
2. washThe combined methylene chloride extracts were washed twice with 50 ml of H2O each time
3. dry with materialdried over Na2SO4
4. concentrationconcentrated