反应详情

温度

0 °C

6.3 g of 55% NaH are added, at 0° C., under an argon atmosphere, to 20 g of 5-nitroindole in solution in 200 ml of dimethylformamide. After stirring for 15 minutes at 0° C., 27.1 g of tetrahydropyranyl chloride are added to the reaction mixture. After stirring for 24 hours at room temperature, the reaction mixture is poured onto 1200 ml of ice-cold water and extracted with ethyl acetate. The combined organic phases are dried over sodium sulphate and evaporated to dryness. The residue is purified by chromatography on a column of silica gel eluted with a 4/1 (v/v) cyclohexane/ethyl acetate mixture, to provide 19 g of 5-nitro-1-tetrahydropyran-2-ylindole. 1H NMR (DMSO): 1.34-2.12 (m, 6H), 3.67-4.48 (m, 2H), 5.70 (dd, J=2.0, 10.2, 1H), 6.75 (d, J=3.4, 1H), 7.72-7.76 (m, 2H), 8.02 (dd, J=2.2, 9.2, 1H), 8.54 (d, J=2.2, 1H).

1. stirringAfter stirring for 24 hours at room temperature
2. extractionextracted with ethyl acetate
3. dry with materialThe combined organic phases are dried over sodium sulphate
4. customevaporated to dryness
5. customThe residue is purified by chromatography on a column of silica gel
6. washeluted with a 4/1 (v/v) cyclohexane/ethyl acetate mixture