反应详情

To a solution of 1.55 g (4.0 mmol) of 1,1,4,4,7,7,10,10-octamethyl-1,2,3,4,7,8,9,10-octahydrodibenzo(b,h)-fluorene in 50 ml of THF, 2.6 ml (−4.2 mmol) of a hexane solution of n-butyllithium was dropwise added in a nitrogen atmosphere with ice cooling, followed by stirring at room temperature for one night. To the resulting red solution, a solution of 0.97 g (6.0 mmol) of 3-tert-butyl-6,6-dimethylfulvene in 25 ml of THF was further dropwise added in a nitrogen atmosphere with ice cooling, followed by stirring at room temperature for one night. Then, 60 ml of water was added. The organic phase extracted with ether and separated was dried over magnesium sulfate and then filtered. From the filtrate, the solvent was removed under reduced pressure to obtain a solid. The solid was purified by column chromatography (silica gel, developing solvent: hexane) to obtain 0.95 g of a light yellow solid (yield: 43%). The analyzed values are given below.

1. stirringby stirring at room temperature for one night
2. extractionThe organic phase extracted with ether
3. customseparated
4. dry with materialwas dried over magnesium sulfate
5. filtrationfiltered
6. customFrom the filtrate, the solvent was removed under reduced pressure
7. customto obtain a solid
8. customThe solid was purified by column chromatography (silica gel, developing solvent: hexane)