反应详情

温度

140 °C

A solution of 3-chloro-4-methylbenzonitrile (25.0 g, 0.165 mol) in methanol (250 mL) in a steel reaction vessel was treated with lithium carbonate (13.4 g, 0.182 mol) and PdCl2.dppf (6.75 g). The vessel was purged with nitrogen, sealed, and heated to 140° C. at 400 psi for 17 hours, filtered and concentrated. The concentrate was treated with ethyl acetate, washed with saturated NaHCO3, dried (MgSO4), filtered, and concentrated. The concentrate was purified by flash chromatography on silica gel with 95:5 to 85:15 hexanes/ethyl acetate to provide 14.4 g (50%) of the desired product. MS (DCI/NH3) m/z 193.0 (M+NH4)+; 1H NMR (CDCl3) δ 8.22 (d, 1H), 7.67 (dd, 1H), 7.37 (d, 1H), 3.93 (s, 3H), 2.68 (s, 3H).

1. customThe vessel was purged with nitrogen
2. customsealed
3. filtrationfiltered
4. concentrationconcentrated
5. additionThe concentrate was treated with ethyl acetate
6. washwashed with saturated NaHCO3
7. dry with materialdried (MgSO4)
8. filtrationfiltered
9. concentrationconcentrated
10. customThe concentrate was purified by flash chromatography on silica gel with 95:5 to 85:15 hexanes/ethyl acetate