HCID 178488256、化合物 → HCID 178526501、化合物
反応式
C[O:2][C:3]1[CH:8]=[C:7]([C:9]2[NH:13][N:12]=[N:11][N:10]=2)[CH:6]=[C:5]([N+:14]([O-:16])=[O:15])[C:4]=1[OH:17]>Br>[N+:14]([C:5]1[CH:6]=[C:7]([C:9]2[NH:13][N:12]=[N:11][N:10]=2)[CH:8]=[C:3]([OH:2])[C:4]=1[OH:17])([O-:16])=[O:15]参加物
3
実験手順
4.0 g of 2-methoxy-6-nitro-4-(1H-tetrazol-5-yl)phenol are treated with 40 ml of constant-boiling hydrobromic acid, whereupon the mixture is stirred at 140° for 8 hours under a nitrogen atmosphere. After cooling, the mixture is poured on to ice. The separated precipitate is filtered under suction and recrystallized from ether. There is obtained 3-nitro-5-(1H-tetrazol-5-yl)-pyrocatechol in the form of orange crystals of m.p. >240° (dec.).
後処理
- temperatureAfter cooling
- additionthe mixture is poured on to ice
- filtrationThe separated precipitate is filtered under suction
- customrecrystallized from ether
出典と根拠
- ORDレコード
- ord-42795be49eb140038e959df5919e02bb
- 出典データセット
- uspto-grants-1997_05
- 特許番号
- US05633371
反応ノート
読み込み中…