反应详情

A solution of 10.3 g of 3-[2-(4-pyridyl)-ethyl]-indole (prepared according to U.S. Pat. No. 3,300,506) in 400 ml n-butanol was heated, under nitrogen, at a temperature of approximately 90° C. Thereafter, 8 g of sodium were added portionwise while agitating magnetically and the temperature was raised to and maintained at about 110° C. until the sodium disappeared. Once the ambient temperature had been restored, the solution was poured into 400 ml water, the organic phase washed with water until it became neutral and then was dried over sodium sulfate and evaporated under vacuum. The evaporation residue was mixed with 25 ml absolute ethanol and purified by means of chromatography over silica gel, (eluant: ethanol-diethylamine=40-1). Following two processes of crystallization in methanol, 2.6 g of 3-[2-(1,2,5,6-tetrahydro-4-pyridyl)-ethyl]-indole were obtained, which melted at 155° C.

1. temperaturethe temperature was raised to and
2. customthe ambient temperature
3. washthe organic phase washed with water until it
4. dry with materialwas dried over sodium sulfate
5. customevaporated under vacuum
6. additionThe evaporation residue was mixed with 25 ml absolute ethanol
7. custompurified by means of chromatography over silica gel, (eluant: ethanol-diethylamine=40-1)
8. customtwo processes of crystallization in methanol