反应详情

In a 30 ml Schlenk flask purged with nitrogen, 0.66 g (1.34 mmol, 1 eq) of 2-(cyclopentadienyl)-2-(1,1,4,4,7,7,10,10-octamethyl-1,2,3,4,7,8,9,10-octahydrodibenzo(b,h)-fluorenyl)propane was placed at room temperature. Then, 10 ml of dehydrated THF was added, and the mixture was stirred by a magnetic stirrer to give a solution. The solution was cooled with an ice bath (light brown solution). To the solution, 0.88 ml (1.43 mmol, 1.07 eq) of n-BuLi (hexane solution) was dropwise added over a period of 1 to 2 minutes. The ice bath was removed, and the solution was stirred at room temperature for 66 hours (dark violet solution). After the solution was cooled with an ice bath, 0.8 ml (6.31 mmol, 4.71 eq) of chlorotrimethylsilane was dropwise added by a syringe (reddish brown solution). The ice bath was removed, and the solution was stirred at room temperature for 2.5 hours. The resulting light yellow solution was poured into 50 ml of a diluted hydrochloric acid solution to perform quen ching. After the soluble component was extracted with 30 ml of diethyl ether, the organic phase was washed with a saturated saline solution. The organic phase was dried over MgSO4, then the MgSO4 was filtered off, and from the filtrate the solvent was vacuum distilled off by a rotary evaporator to obtain a slightly yellow amorphous product. The amorphous product was purified by silica gel column chromatography (developing solvent: hexane) to obtain 0.71 g of a white solid (yield: 93%).

1. customwas placed at room temperature
2. customto give a solution
3. temperatureThe solution was cooled with an ice bath (light brown solution)
4. customThe ice bath was removed
5. stirringthe solution was stirred at room temperature for 66 hours (dark violet solution)
6. temperatureAfter the solution was cooled with an ice bath
7. customThe ice bath was removed
8. stirringthe solution was stirred at room temperature for 2.5 hours
9. additionThe resulting light yellow solution was poured into 50 ml of a diluted hydrochloric acid solution
10. extractionAfter the soluble component was extracted with 30 ml of diethyl ether
11. washthe organic phase was washed with a saturated saline solution
12. dry with materialThe organic phase was dried over MgSO4
13. filtrationthe MgSO4 was filtered off
14. distillationdistilled off by a rotary evaporator
15. customto obtain a slightly yellow amorphous product
16. customThe amorphous product was purified by silica gel column chromatography (developing solvent: hexane)