Imidazole → 4-Methyl-4-trimethylsilyloxy-7-oxa-1octyne

Beteiligte Stoffe

Reaktionsschritte

To a solution of 13 g. (0.091 moles) of 4-hydroxy-4-methyl-7-oxa-1-octyne and 16 g. (0.235 moles) of imidazole in 80 ml. of dry dimethylformamide is added dropwise, at 5° C. under nitrogen with stirring, 12.5 ml. (0.115 moles) of trimethylchlorosilane. After an additional 15 minutes at 5° C. the solution is stirred at ambient temperature for 18 hours then added to 450 ml. of hexane. The resulting solution is washed with ice-cold water, ice-cold saturated sodium chloride solution, dried with anhydrous magnesium sulfate and taken to dryness in vacuo. Distillation of the residual oil furnishes 16.8 g. (86%) of product; b.p. 87°-88° C. (7 mm.).

Herkunft & Nachweise