反应详情

温度

0 °C

6 g of oxo-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-naphthalen-2-yl)-acetic acid ethyl ester and 2.6 g of butoxytrimethylsilane were dissolved in 200 ml of methylene chloride. The solution was cooled to 0° C., treated with 400 mg of trimethylsilyl triflate and stirred at 0° C. for 1.5 hours. After the dropwise addition of 2 g of triethylsilane, the reaction mixture was stirred at room temperature for 26 hours, then diluted with 500 ml of water, acidified with 2N hydrochloric acid and extracted with ether. The organic phase was washed with water, dried (Na2SO4) and the solvent evaporated. The oily residue was purified with flash chromatography (silica gel, eluent hexane/tert.butyl methyl ether 3%) and preparative HPLC (YMC CN 60 Å5-15 μm, hexane) to give 3.5 g of the title product as colorless oil.

1. stirringthe reaction mixture was stirred at room temperature for 26 hours
2. extractionextracted with ether
3. washThe organic phase was washed with water
4. dry with materialdried (Na2SO4)
5. customthe solvent evaporated
6. customThe oily residue was purified with flash chromatography (silica gel, eluent hexane/tert.butyl methyl ether 3%) and preparative HPLC (YMC CN 60 Å5-15 μm, hexane)