Water → 2-Ethoxy-5-dimethylsilylpyridine

Participants

Reaction Steps

A mixture of 18.2 g (0.09 mol) of 2-ethoxy-5-bromopyridine (can be obtained from 2,5-dibromopyridine and sodium methanolate in DMSO), 11.4 g (0.12 mol) of chlorodimethylsilane and 50 ml of anhydrous tetrahydrofuran (THF) is added dropwise to 2.4 g (0.10 mol) of magnesium turnings in 10 ml of anhydrous THF, a strongly exothermic reaction occurring. The reaction is completed by refluxing for two hours. The mixture is then poured into water and extracted repeatedly with n-hexane, The extracts are washed with water and saturated sodium chloride solution, dried and evaporated, and the residue is distilled. 7 g (43%) of 2-ethoxy-5-dimethylsilylpyridine are obtained as a colorless oil of boiling point 7=140°-150° C.

Provenance & Evidence