反应详情

温度

-60 °C

A solution of 5 g of potassium tert.-butylate in 80 ml of dimethylformamide was added at -60° C. over 90 minutes to a solution of 5 g of 3-hydroxy-cyclopentyl-acetaldehyde, 15 g of triphenyl methyl phosphonium bromide and 100 ml of dimethylformamide and the resulting suspension was stirred at -60° C. for 2 hours after which the temperature was allowed to rise to 20° C. The mixture was poured into 2N hydrochloric acid solution and the mixture was extracted with isopropyl ether. The organic phase was dried and evaporated to dryness under reduced pressure. The residue was chromatographed over silica gel and was eluted with a 7-3 cyclohexane-ethyl acetate mixture to obtain 1.7 g of 3-(2-propenyl)-cyclopentanol.

1. customto rise to 20° C
2. extractionthe mixture was extracted with isopropyl ether
3. customThe organic phase was dried
4. customevaporated to dryness under reduced pressure
5. customThe residue was chromatographed over silica gel
6. washwas eluted with a 7-3 cyclohexane-ethyl acetate mixture