反应详情

温度

120 °C

To a flask was added methyl 3-bromo-2-methylbenzoate (21 g, 91.7 mmol), potassium hexacyanoferrate (II) trihydrate (9.7 g, 22.9 mmol), Na2CO3 (9.7 g, 91.7 mmol) and Pd(OAc)2 (102 mg) in N,N-dimethylacetamide (100 mL). The flask's atmosphere was evacuated and replaced with nitrogen, and the reaction mixture heated at 120° C. for 10 hours. The reaction mixture was cooled to room temperature and diluted with ethyl acetate (150 mL). The resultant slurry was filtered and washed thoroughly with ethyl acetate (2×50 mL). The combined filtrate was washed with brine and water, dried over Na2SO4 and evaporated under reduced pressure. The residue obtained after the concentration was purified using flash chromatography (ethyl acetate-hexanes (1:9) as the eluent) to provide methyl 3-cyano-2-methylbenzoate (11.2 g, 70% yield). 1H NMR spectrum (in DMSO-d6): δ 8.03 (d, J=8.1 Hz, 1H); 7.98 (d, J=7.9 Hz, 1H); 7.49 (t, 1H); 3.84 (s, 3H); 2.65 (s, 3H).

1. customThe flask's atmosphere was evacuated
2. temperatureThe reaction mixture was cooled to room temperature
3. additiondiluted with ethyl acetate (150 mL)
4. filtrationThe resultant slurry was filtered
5. washwashed thoroughly with ethyl acetate (2×50 mL)
6. washThe combined filtrate was washed with brine and water
7. dry with materialdried over Na2SO4
8. customevaporated under reduced pressure
9. customThe residue obtained
10. concentrationafter the concentration
11. customwas purified