反应详情

A mixture of 15.5 g (0.05 mole) of N-ethyl-3,6-carbazolediol diacetate, 18.4 g (0.1 mole) of 2-piperidinoethylchloride hydrochloride, 10.8 g (0.2 mole) of sodium methoxide and 400 ml of chlorobenzene is refluxed for 24 hours. Upon cooling, the reaction mixture is filtered, and the filtrate is washed with several portions of water, dried over anhydrous magnesium sulfate, diluted with ether and acidified with ethereal HCl. The resulting precipitate is collected and recrystallized from methanol-ethyl acetate to give N-ethyl-3,6-bis(2-piperidinoethoxy)carbazole dihydrochloride, M.P. 248°-250° C.

1. temperatureis refluxed for 24 hours
2. temperatureUpon cooling
3. filtrationthe reaction mixture is filtered
4. washthe filtrate is washed with several portions of water
5. dry with materialdried over anhydrous magnesium sulfate
6. additiondiluted with ether
7. customThe resulting precipitate is collected
8. customrecrystallized from methanol-ethyl acetate