反应详情

A three neck 300 ml flask fitted with a reflux condenser, thermometer and dropping funnel was charged with 18.52 grams (0.15 moles) of commercially available 2-ethoxy benzylcyanide in 50 ml of dimethyl sulfoxide (DMSO). To the reaction was added 17.6 grams (0.165 moles, 1.1 ec.) of 1-chloropentane. While stirring at room temperature, 13.2 grams (0.165 moles) of 50% NaOH in 20 ml of DMSO was added over 20 minutes. A slight exotherm occurred and the reaction mixture was stirred at room temperature for 2 hours after which gas-liquid chromatoqraphy (GLC) indicated the reaction was 92% complete. The reaction was stirred for an additional 3 hours, then water was added followed by 200 ml of ether. After washing with acid and brine, the solvent was concentrated and gave an oil which was distilled under vacuum (160°-165° C. at 0.5 mm) and gave 15.82 grams (47.7% yield) of product.

1. customA three neck 300 ml flask fitted with a reflux condenser
2. stirringthe reaction mixture was stirred at room temperature for 2 hours after which gas-liquid chromatoqraphy (GLC)
3. stirringThe reaction was stirred for an additional 3 hours
4. washAfter washing with acid and brine
5. concentrationthe solvent was concentrated
6. customgave an oil which
7. distillationwas distilled under vacuum (160°-165° C. at 0.5 mm)