反应详情

To DMF (10 mL) was added HATU (3.61 g, 9.50 mmol), 4-amino-3-nitrobenzoic acid (1.15 g, 6.32 mmol), triethylamine (1.32 mL, 958 mg, 9.47 mmol), and 4-tert-butylaniline (1.0 mL, 945 mg, 6.33 mmol). The mixture was stirred at ambient temperature for 18 h then was poured into ethyl acetate and extracted once with water and five times with brine. The organic phase was dried, filtered, and the solvent removed under reduced pressure. The residue was purified by chromatography using gradient of a 30-70% heptane/ethyl acetate to afford 4-amino-N-(4-tert-butylphenyl)-3-nitrobenzamide. MS (ESI) m/z 314.1 (M+H); retention time 1.50 min (Method 10), which was used directly in the next step.

1. extractionextracted once with water and five times with brine
2. customThe organic phase was dried
3. filtrationfiltered
4. customthe solvent removed under reduced pressure
5. customThe residue was purified by chromatography