反应详情

98 g [1.5 mols] of potassium cyanide were suspended in 600 ml of methanol, and 105 g [0.5 mol] of 2-(5-acetoxypentyl)- cyclopent-2-ene-1-one, dissolved in 45 ml of acetic acid, were added dropwise within 2.5 hours. After 20 hours, agitation at room temperature, the suspension was dropped into ice-water with agitation, extracted thrice with diethyl ether, the ether phases were united, washed with water, dried over sodium sulfate and concentrated. The oily residue was stirred for 5 hours at room temperature in 200 ml of pyridine and 30 ml of acetic anhydride, the solvent was then distilled off under reduced pressure and the residue was distilled in a bulb tube. 102 g having a boiling point of 180° C. at 0.4 mm Hg were obtained; IR spectrum: 2220 cm-1.

1. additionwere added dropwise within 2.5 hours
2. extractionextracted thrice with diethyl ether
3. washwashed with water
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated
6. distillation30 ml of acetic anhydride, the solvent was then distilled off under reduced pressure
7. distillationthe residue was distilled in a bulb tube
8. customwere obtained