反应详情

A mixture of 4.90 grams (0.02 mole) of ethyl 3-[(4-bromo-2-methylphenyl)amino]-3oxopropanoate prepared in Example I (Compound No. 75), 358 grams (4.9 moles) of n-butylamine, 150 milliliters of ethanol and 5 drops of water was stirred at room temperature for about 16 hours. After this period, rotary evaporation gave a crude product as a white solid. The white solid was recrystallized from ethyl acetate-hexane to give 3.08 grams (0.009 mole) of N-butyl 3-[(4-bromo-2-methylphenyl)amino]-3- oxopropanamide having a melting point of 123° C.-125° C. Elemental analysis of the product indicated the following:

1. waitAfter this period
2. customrotary evaporation
3. customgave a crude product as a white solid
4. customThe white solid was recrystallized from ethyl acetate-hexane