3-Pyridinemethanol → 3-(2-Propynyloxymethyl)pyridine

Beteiligte Stoffe

Reaktionsschritte

While maintaining the reaction mixture at 5°-10° C., 3-pyridylcarbinol (50.0 g., 0.45 mol) was slowly added to a mixture of sodium hydride (24.0 g of a 50% suspension in mineral oil, 0.5 mol) in 250 ml dry N,N-dimethylformamide. Propargyl chloride (37.0 g, 0.5 mole) was then slowly added to this mixture at 15° C. Following the addition, the reaction mixture was warmed to 35° and maintained for 15 mins at this temperature. The reaction was then cooled to 15°-20°, carefully quenched by dropwise addition of water and extracted with ether. The combined ether extracts were dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure to give 45 g crude product. Distillation gave 30.0 g of 3-(2-propynyloxymethyl)pyridine. Yield 44% theory; b.p. 95° C. (0.9 mm).

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