反应详情

A mixture of 600 mg of 1-(4-cyanobutyl)-3-methyl-2-(1-imidazolyl)indole, 173 mg of sodium azide, 142 mg of ammonium chloride and 5 mg of lithium chloride in 2 ml of dimethylformamide is heated at 120° overnight. After cooling the mixture is filtered and the filtrate diluted with ca. 25 ml of water. After the pH is adjusted to 10-11 with 3N NaOH, the solution is washed with ether to remove unreacted nitrile. The aqueous phase is adjusted to pH 5-6 with 2N HCl and extracted with ethylacetate. The extract is washed with water, dried over magnesium sulfate and concentrated in vacuo. The solid residue is slurried in petroleum ether and collected to give 1-[4-(5-tetrazolyl)-butyl]-3-methyl-2-(1-imidazolyl)indole.

1. temperatureis heated at 120° overnight
2. temperatureAfter cooling the mixture
3. filtrationis filtered
4. additionthe filtrate diluted with ca. 25 ml of water
5. washthe solution is washed with ether
6. customto remove unreacted nitrile
7. extractionextracted with ethylacetate
8. washThe extract is washed with water
9. dry with materialdried over magnesium sulfate
10. concentrationconcentrated in vacuo
11. customcollected