Dimethylformamide → 2-Phenoxy-alpha-methoxyiminobenzyl cyanide

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To 2-phenoxybenzaldoxime (1.07 g, 0.005 mole) was added dried ether (10 ml), and chlorine (0.46 g, 0.0065 mole) was introduced into the mixture below -10° C. followed by stirring at 0° C. for 5 hours. After the completion of the reaction, the reaction mixture was concentrated under reduced pressure, and then, dried methylene chloride (10 ml) and tetraethylammonium cyanide (0.86 g, 0.0055 mole) were added to the resulting residue and the mixture was stirred overnight. After completion of the reaction, water (150 ml) was added to the reaction mixture, which was extracted with methylene chloride, dried over anhydrous magnesium sulfate and purified by silica gel chromatography (ethyl acetate/n-hexane) to obtain crude α-hydroxyimino-2-phenoxyphenylacetonitrile (0.51 g), to which were added dried dimethylformamide (4 ml) and potassium carbonate (0.36 g, 0.0026 mole). Dimethyl sulfate (0.30 g, 0.0024 mole) was further added to the mixture, which was stirred at room temperature for 2 hours. After completion of the reaction, ether (100 ml) was added to the reaction mixture, which was washed twice with water, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The crude product thus obtained was purified by silica gel chromatography (ethyl acetate/n-hexane) to obtain α-methoxyimino-2-phenoxyphenylacetonitrile (0.21 g, yield: 16.6%) as a colorless oil.

Herkunft & Nachweise