反应详情

To a solution of 3-(4-nitrophenoxy)aniline (4.69 g, 20.4 mmol) and 3-(1-cyano-1-methylethyl)benzoic acid (3.98 g, 21.0 mmol) produced in Example A7(ii) in pyridine (100 mL) were added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (4.69 g, 24.5 mmol) and N,N-dimethylpyridine-4-amine (151 mg, 1.24 mmol), and the mixture was stirred at room temperature for 4 hr. To the reaction mixture was added methanol (50 mL) and the mixture was further stirred at the same temperature for 30 min. The solvent was evaporated under reduced pressure. The residue was diluted with ethyl acetate (200 mL), washed with dilute hydrochloric acid (150 mL×2) and saturated aqueous sodium hydrogencarbonate solution (150 mL), successively, and dried over anhydrous magnesium sulfate. The insoluble material was filtered off, and the filtrate was concentrated under reduced pressure to give the title compound (8.10 g, 99%) as a yellow amorphous substance. The obtained compound was used in the next reaction without a further purification.

1. stirringthe mixture was further stirred at the same temperature for 30 min
2. customThe solvent was evaporated under reduced pressure
3. additionThe residue was diluted with ethyl acetate (200 mL)
4. washwashed with dilute hydrochloric acid (150 mL×2) and saturated aqueous sodium hydrogencarbonate solution (150 mL)
5. dry with materialsuccessively, and dried over anhydrous magnesium sulfate
6. filtrationThe insoluble material was filtered off
7. concentrationthe filtrate was concentrated under reduced pressure