反应详情

Into a 50-mL round-bottom flask was placed tetrahydrofuran saturated with NH3 (gas) (20 mL), 4′-hydroxybiphenyl-4-carboxylic acid (1 g, 4.67 mmol, 1 equiv), HOBt (900 mg, 6.67 mmol, 1.4 equiv), EDCl (1.34 g, 7.0 mmol, 1.5 equiv). The resulting solution was stirred for 4 hrs at room temperature. The resulting mixture was concentrated under vacuum. The residue was dissolved in 50 mL of ethyl acetate, washed with 2×40 mL of H2O, 1×50 mL of brine, dried over anhydrous sodium sulfate and concentrated under vacuum. The reside was purified by column chromatography on silica gel (eluting with 1:1 ethyl acetate/petroleum ether) to give 500 mg (50%) of 4′-hydroxybiphenyl-4-carboxamide as a white solid.

1. customInto a 50-mL round-bottom flask was placed
2. concentrationThe resulting mixture was concentrated under vacuum
3. dissolutionThe residue was dissolved in 50 mL of ethyl acetate
4. washwashed with 2×40 mL of H2O, 1×50 mL of brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under vacuum
7. customThe reside was purified by column chromatography on silica gel (eluting with 1:1 ethyl acetate/petroleum ether)