反应详情

温度

60 °C

4.25 g of tert-butyl 1-oxa-6-azaspiro[2.5]octane-6-carboxylate was dissolved in 30 ml dimethylformamide, 5.38 g of sodium imidazole was added thereto, and the mixture was stirred at 60° C. for 3 hr and 40 min. After cooling, ethyl acetate was added to the reaction solution, and it was washed with water for 3 times and then with brine, dried over anhydrous magnesium sulfate, and filtered. The filtrate was evaporated and subjected to silica gel column chromatography to give 4.93 g of tert-butyl 4-hydroxy-4-(1H-1-imidazolylmethyl)-1-piperidinecarboxylate.

1. temperatureAfter cooling
2. washwas washed with water for 3 times
3. dry with materialwith brine, dried over anhydrous magnesium sulfate
4. filtrationfiltered
5. customThe filtrate was evaporated