反应详情

Following the general procedure for the preparation of acetylsilanes (see Example 1) tert-butyl(1-hydroxy-1-methylethyl)dimethylsilane was prepared from tert-butylchlorodimethylsilane (5.00 g, 33.2 mmol) and ethoxyvinyl lithium (prepared from ethyl vinyl ether (3.11 g, 43.1 mmol) and tert-butyl lithium (1.9 M in pentane, 22.7 ml, 43.1 mmol) in THF (50 ml)). The crude material was hydrolysed with acetone/1 N HCl (2:1, 60 ml), and purified by silica-gel chromatography (silica-gel 40-63 μm, hexane/EtOAc, 9:1) to afford 2.13 g (41% over 2 steps) of acetyl(tert-butyl)dimethylsilane, of which 1.44 g, (9.10 mmol) was reacted according to Example 1 with methyl lithium (1.6 M in Et2O, 28.4 ml, 45.4 mmol) to provide after purification by silica-gel flash chromatography (silica-gel 15-40 μm, hexane/EtOAc, 9:1) 590 mg (37%) of the odoriferous title compound.

1. custompurified by silica-gel chromatography (silica-gel 40-63 μm, hexane/EtOAc, 9:1)