反应详情

温度

67.5 °C

88 ml (176 mmol) of n-propylmagnesium chloride are added to a solution of 30 g (88 mmol) of 4-phenyl-1-(toluene-4-sulfonyl)piperidine-4-carbonitrile in 500 ml of toluene. The reaction mixture is stirred for 6 hours at 65-70° C. and then overnight at room temperature. The reaction is stopped by adding 100 ml of tetrahydrofuran, and is then hydrolysed with 1N hydrochloric acid solution and extracted with ethyl acetate. The organic phases are combined and dried over sodium sulfate. The solvents are evaporated off and the residue is then taken up in diethyl ether and filtered off. 1.38 g of starting material are recovered. The filtrate is concentrated to dryness and then chromatographed on silica gel (eluent: 80/20 heptane/ethyl acetate). 17.8 g of 1-[4-phenyl-1-(toluene-4-sulfonyl)piperidin-4-yl]-butan-1-one in the form of a white powder are obtained in a yield of 50%.

1. customovernight
2. customat room temperature
3. extractionhydrolysed with 1N hydrochloric acid solution and extracted with ethyl acetate
4. dry with materialdried over sodium sulfate
5. customThe solvents are evaporated off
6. filtrationfiltered off
7. custom1.38 g of starting material are recovered
8. concentrationThe filtrate is concentrated to dryness
9. customchromatographed on silica gel (eluent: 80/20 heptane/ethyl acetate)