Реакция #1583841

Уравнение реакции

cesium carbonate

3-(3-chlorophenyl)-1H-pyrazole

salicylaldoxime

5-bromo-2-chlorotoluene

→

title compound

Выход 21.7%

1-(3-methyl-4-chlorophenyl)-3-(3-chlorophenyl)-1H-pyrazole

Выход 21.7%

Растворители

N,N-dimethylformamide

Условия реакции

Обработка

1. 1
   Другоеprepared
2. 2
   Температураto cool to room temperature
3. 3
   ФильтрацияThe resulting suspension was filtered
4. 4
   Концентрированиеthe filtrate was concentrated
5. 5
   ДругоеThe resulting residue was purified by medium pressure liquid chromatography (2 to 10% gradient of ethyl acetate in hexanes as eluant)

Методика

A mixture of 3-(3-chlorophenyl)-1H-pyrazole (5.3 g, 29.8 mmol) (prepared according to the method given in European Patent Publication EP 538156), salicylaldoxime (0.58 g, 4.25 mmol), 5-bromo-2-chlorotoluene (2.8 g, 21.3 mmol), copper oxide (0.15 g, 1.06 mmol) and cesium carbonate (11.8 g, 36.2 mmol) in 20 mL of N,N-dimethylformamide was heated at 140° C. overnight and then allowed to cool to room temperature. The resulting suspension was filtered and the filtrate was concentrated under reduce pressure. The resulting residue was purified by medium pressure liquid chromatography (2 to 10% gradient of ethyl acetate in hexanes as eluant) to give the title compound as a white solid (1.4 g).

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