1,4-Dioxane → HCID 69331504、化合物

反応式

[NH2:1][C:2]1[C:3]([C:25]#[N:26])=[N:4][C:5]([C:15]2[CH:20]=[CH:19][C:18](=[O:21])[N:17]([CH:22]([CH3:24])[CH3:23])[N:16]=2)=[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[Br:14])[N:7]=1.[O:27]1CCOCC1>Br.CC(O)=O>[NH2:1][C:2]1[C:3]([C:25]([NH2:26])=[O:27])=[N:4][C:5]([C:15]2[CH:20]=[CH:19][C:18](=[O:21])[N:17]([CH:22]([CH3:24])[CH3:23])[N:16]=2)=[C:6]([C:8]2[CH:13]=[CH:12][CH:11]=[CH:10][C:9]=2[Br:14])[N:7]=1

参加物

反応条件

温度: 22.5 °C

実験手順

A mixture of 3-amino-5-(2-bromophenyl)-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-2-pyrazinecarbonitrile (59 mg) in 25% hydrogen bromide in AcOH (0.36 ml) was stirred at 20-25° C. for 5 hours. Dioxane (3 ml) was added to the mixture to give a precipitate. The precipitate was collected by filtration and suspended in sat. aq. NaHCO3 to give a solid. The solid was collected by filtration and dried under reduced pressure to give 3-amino-5-(2-bromophenyl)-6-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-2-pyrazinecarboxamide (17 mg).