Реакция #12014
ord-90af6704e9c3417f9f4a191d574bb4d4
Уравнение реакции
Реактанты
Растворители
Условия реакции
Обработка
- 1Температураwas heated
- 2Температураto reflux for 2 h
- 3workup.ADDITIONwas added
- 4ТемператураThe mixture was heated
- 5Температураto reflux for 16 h
- 6Температураthen cooled to room temperature
- 7Другоеthe phases were separated
- 8ЭкстракцияThe aqueous phase was extracted three times with ethyl acetate
- 9Промывкаthe combined organic layers were washed with 1M aqueous sodium hydroxide solution and brine
- 10Сушкаdried over magnesium sulfate
- 11Фильтрацияfiltered
- 12Другоеevaporated
- 13ДругоеThe residue was purified by chromatography on silica gel (0.032–0.063 mm) with n-hexane as eluant
Методика
A suspension of 150.0 mg (1.23 mmol) 9-borabicyclo[3.3.1]nonane and 47 μl (0.62 mmol) propargyl bromide in 1 ml tetrahydrofuran was heated to reflux for 2 h. The mixture was cooled to room temperature then 0.61 ml (1.83 mmol) of a degassed 3M sodium hydroxide solution was added and after 1 h a mixture of 0.20 g (0.54 mmol) (4R,9aR)-6-bromo-4-methyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester (Example 5, intermediate b) and 19.0 mg tetrakis(triphenylphosphine)palladium in 1 ml tetrahydrofuran was added. The mixture was heated to reflux for 16 h then cooled to room temperature and poured into water and ethyl acetate; the phases were separated. The aqueous phase was extracted three times with ethyl acetate and the combined organic layers were washed with 1M aqueous sodium hydroxide solution and brine, dried over magnesium sulfate, filtered and evaporated. The residue was purified by chromatography on silica gel (0.032–0.063 mm) with n-hexane as eluant to afford the desired product as a colorless oil (35.2%).