Hydrochloric Acid → Benzyl 2-cyano-2-(2-nitro-4-methylphenyl)ethanoate

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반응 단계

benzyl cyanoacetate (3.50 g; 20 mmol) is added to a suspension of potassium carbonate (6.08 g; 44 mmol) in 5 mL of DMF. The carbonate is washed with 2 mL of DMF. A solution of 3-nitro-4-chlorotoluene (3.41 g, 20 mmol) in 5 mL of DMF is added and the resulting reaction mixture is stirred at 70° C. for 24 hours. After cooling down to ambient temperature, it is treated with a 5N aqueous solution of HCl (12.5 mL). The mixture is divided between ether (100 mL) and water (50 mL) then the organic phase is re-extracted with ether. The ethereal phases are washed with water, dried over anhydrous MgSO4, filtered under vacuum and evaporated. The residue is purified by chromatography on silica gel (eluent: CH2Cl2/pentane, 1/1) in order to produce benzyl 2-cyano-2-(2-nitro-4-methylphenyl)ethanoate with a yield of 75%.

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