Cyclotetrasilane, octaethyl- → HCID 22918068, compound

Temperature

0 °C

In an argon atmosphere, to a tetrahydrofuran solution (1 ml) of 52 mg (0.15 mmol) of octaethylcyclotetrasilane was added 0.58 ml (0.15 mmol) of a tetrahydrofuran solution (0.27M) of phenyldimethylsilyllithium, and stirred at 0° C. for 15 minutes. Then, tetrahydrofuran was distilled out under vacuum, and hexane (1 ml) was added to give a hexane solution (Solution 1). A dichloromethane solution (1 ml) of 68 mg (0.05 mmol) of hexadecasilane (9) obtained in Example 9 was treated with 7.5 mg (0.05 mmol) of trifluoromethanesulfonic acid at room temperature for 30 minutes to give 1-(trifluoromethanesulfonyloxy)hexadecasilane. Then, dichloromethane was distilled out under vacuum, and hexane (1 ml) was added to give a hexane solution (solution 2). The Solution 1 was added to the Solution 2 at -78° C. and stirred for 15 minutes. Methanol (0.1 ml) and triethylamine (0.1 ml) were added, then saturated aqueous sodium bicarbonate solution (2 ml) was added, stirred, the hexane layer was separated, and dried with magnesium sulfate. The resulting crude product was purified by a silica gel column chromatography (hexane) to give 137 mg (39% yield) of eicosasilane (10) as a colorless crystal.

1. distillationThen, tetrahydrofuran was distilled out under vacuum, and hexane (1 ml)
2. additionwas added

ORD record

ord-3d06712dfcd84245b4ac2b152a6c94e7

Source dataset

uspto-grants-1997_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05663271