反应详情

A solution of 3-chloro-5-chloromethyl-2-ethyl-pyridine (4.03 g, 21 mmol) in dimethylformamide (26 mL, 0.8 M) is cooled to 0° C. and treated with a solution of potassium cyanide (1.48 g, 22.7 mmol) in water (10 mL). After 4 h, the solution is diluted with 50% aq NaCl and extracted with ethyl acetate. The organic extracts are washed with sat'd aq lithium chloride and purified by MPLC (30-90% ethyl acetate in heptane) to give 5-chloro-6-ethyl-pyridin-3-yl-acetonitrile as a light brown oil (3.42 g, 90%): Rf 0.29 (30% ethyl acetate in n-heptane), 1H NMR (CDCl3, 300 MHz) δ 8.38 (br s, 1 H), 7.67 (br s, 1 H), 3.74 (s, 2 H), 2.97 (q, J=7.5 Hz, 2 H), 1.30 (t, J=7.5 Hz, 3 H) ESI-LCMS m/z calcd for C9H9ClN2: 180.0; found 181.0 (M+1)+.

1. extractionextracted with ethyl acetate
2. washThe organic extracts are washed with sat'd aq lithium chloride
3. custompurified by MPLC (30-90% ethyl acetate in heptane)