Dimethylformamide → 2-(3-Nitro-6-methoxy-2-pyridinylamino)-3,3-diphenylpropionic acid

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Reaction Conditions

Reaction Steps

2.50 g (10.4 mmol) of 2-amino-3,3-diphenylpropionic acid, 0.84 g (4.3 mmol) of 2-chloro-3-nitro-6-methoxypyridine and 0.55 g (5.2 mmol) of sodium carbonate were introduced into 18 ml of DMF and 18 ml of water, and the mixture was stirred at 80° C. for 5 hours. Ethyl acetate and water were then added, and the phases were separated. The aqueous phase was acidified with 6 normal hydrochloric acid and extracted three times with ethyl acetate. After drying with MgSO4 and concentration under reduced pressure, the crude product was recrystallized from isopropanol. 0.34 g (20.1%) of a yellow powder of melting point 172-180° C. was obtained.

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