Reaktion #1585305

Reaktionsgleichung

8-bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene

5-chloro-1-(2,4-difluoro-phenyl)-1H-[1,2,4]triazole

9-bromo-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene

ethyl acetate

→

9-Bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulen

Ausbeute 62.0%

Lösungsmittel

cyclohexane

Reaktionsbedingungen

Vorschrift

9-Bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene was prepared similarly to 8-bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene from 5-chloro-1-(2,4-difluoro-phenyl)-1H-[1,2,4]triazole (1.33 g, 6.16 mmol) and 9-bromo-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene (1.36 g, 5.13 mmol), the crude product was subjected to flash chromatography (SiO2, gradient 0 to 35% ethyl acetate in cyclohexane) to give 9-Bromo-2-[2-(2,4-difluoro-phenyl)-2H-[1,2,4]triazol-3-yl]-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulen (1.42 g, 62%). LCMS RT=4.80 M+H+=444/446.

Quelle