Nitric Acid → Ethyl 5-(4,5-dimethoxy-2-nitrobenzoyl)-2-(1-isopropoxycarbonyloxy-2-methylpropyl)-2H-1,2,3-triazole-4-carboxylate
反応式
[N+:1]([O-:4])(O)=[O:2].[CH3:5][O:6][C:7]1[CH:8]=[C:9]([CH:33]=[CH:34][C:35]=1[O:36][CH3:37])[C:10]([C:12]1[C:13]([C:28]([O:30][CH2:31][CH3:32])=[O:29])=[N:14][N:15]([CH:17]([O:21][C:22]([O:24][CH:25]([CH3:27])[CH3:26])=[O:23])[CH:18]([CH3:20])[CH3:19])[N:16]=1)=[O:11]>>[CH3:37][O:36][C:35]1[C:7]([O:6][CH3:5])=[CH:8][C:9]([C:10]([C:12]2[C:13]([C:28]([O:30][CH2:31][CH3:32])=[O:29])=[N:14][N:15]([CH:17]([O:21][C:22]([O:24][CH:25]([CH3:26])[CH3:27])=[O:23])[CH:18]([CH3:20])[CH3:19])[N:16]=2)=[O:11])=[C:33]([N+:1]([O-:4])=[O:2])[CH:34]=1参加物
3
実験手順
70% nitric acid (1 ml) was added to ethyl 5-(3,4-dimethoxybenzoyl)-2-(1-isopropoxycarbonyloxy-2-methylpropyl)-2H-1,2,3-triazole-4-carboxylate (86 mg, 0.19 mmol) as Intermediate 8 under ice cooling. The mixture was stirred at that temperature for 30 min. The reaction solution was poured into ice and then extracted with ethyl acetate. The organic layer was washed with a saturated aqueous sodium hydrogencarbonate solution and saturated brine solution in that order and dried over anhydrous magnesium sulfate. The solvent was evaporated to give the title compound as a single compound (49 mg, 52%). The Rf value of thin-layer chromatography on silica gel and 1H-NMR spectrum were the same as those of the title compound of Example 20 (a).
後処理
- additionThe reaction solution was poured into ice
- extractionextracted with ethyl acetate
- washThe organic layer was washed with a saturated aqueous sodium hydrogencarbonate solution and saturated brine solution in that order
- dry with materialdried over anhydrous magnesium sulfate
- customThe solvent was evaporated
出典と根拠
- ORDレコード
- ord-5e4ff036ebfd480e9842e45fc6be3724
- 出典データセット
- uspto-grants-2007_07
- 特許番号
- US07238812B2
反応ノート
読み込み中…