Ethyl bromopyruvate → Ethyl 6-(4-(tert-butoxycarbonyl)piperazin-1-yl)quinoxaline-2-carboxylate
反応式
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:19]=[CH:18][C:17]([NH2:20])=[C:16]([NH2:21])[CH:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Br[CH2:23][C:24](=O)[C:25]([O:27][CH2:28][CH3:29])=[O:26]>CN1C(=O)CCC1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:15]=[C:16]3[C:17](=[CH:18][CH:19]=2)[N:20]=[C:24]([C:25]([O:27][CH2:28][CH3:29])=[O:26])[CH:23]=[N:21]3)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]参加物
4
実験手順
A mixture of tert-butyl-4-(3,4-diaminophenyl)piperazine-1-carboxylate (8 g, 27.6 mmol), Ethyl bromopyruvate (8 g, 41.4 mmol), and NMP (40 ml) was stirred at r.t. overnight. The solution was extracted by EA and purified by gel chromatography (PE:EA=3:1) to afford ethyl 6-(4-(tert-butoxycarbonyl)piperazin-1-yl)quinoxaline-2-carboxylate (2 g, yield: 20%) as a yellow solid.