反应详情

温度

120 °C

A stirred mixture of 1.0 g (0.0032 mole) of 1-(2,4-dichloro-5-hydroxyphenyl)-4-difluoromethyl -4,5-dihydro-3-methyl-1,2,4-triazol-5(1H)-one, 0.66 g (0.0048 mole) of potassium carbonate, and 0.76 g (0.0048 mole) of 4-chloronitrobenzene in 20 ml of N,N-dimethylformamide was heated at 120° C. for approximately 18 hours. The reaction mixture was cooled and was poured into ice-water. This aqueous mixture was neutralized with hydrochloric acid and then was extracted with ethyl acetate. The organic phase was washed with water and then was dried over anhydrous magnesium sulfate. This mixture was filtered, and the filtrate was evaporated under reduced pressure leaving an orange oil. The orange oil was purified by column chromatography on silica gel, eluting with methylene chloride to yield 1.2 g of 1-[2,4-dichloro-5-(4-nitrophenoxy)phenyl]-4-difluoromethyl-4,5-dihydro-3-methyl-1,2,4-triazol-5(1H)-one as a solid, m.p. 99°-101° C., compound 92 of Table 1.

1. temperatureThe reaction mixture was cooled
2. extractionwas extracted with ethyl acetate
3. washThe organic phase was washed with water
4. dry with materialwas dried over anhydrous magnesium sulfate
5. filtrationThis mixture was filtered
6. customthe filtrate was evaporated under reduced pressure
7. customleaving an orange oil
8. customThe orange oil was purified by column chromatography on silica gel
9. washeluting with methylene chloride