Water → HCID 22402945、化合物
反応式
[CH3:1][N:2]1[C:6]2[CH:7]=[C:8]([C:15]([O:17]C)=[O:16])[C:9]([C:11]([O:13]C)=[O:12])=[CH:10][C:5]=2[N:4]=[C:3]1[CH3:19].[OH-].[K+].O>CO>[CH3:1][N:2]1[C:6]2[CH:7]=[C:8]([C:15]([OH:17])=[O:16])[C:9]([C:11]([OH:13])=[O:12])=[CH:10][C:5]=2[N:4]=[C:3]1[CH3:19]参加物
5
実験手順
A mixture of dimethyl 1,2-dimethyl-5,6-benzimidazoledicarboxylate (2.80 g, 10.7 mmol), potassium hydroxide (1.49 g, 26.7 mmol), water and methanol is stirred at room temperature for 16 hours and then concentrated in vacuo. The resultant residue is taken up in a minimal amount of water, cooled, acidified to pH 3 with hydrochloric acid and filtered to give the title product as pink crystals (2.28 g, 91.2%), mp 308°-312° C.
後処理
- concentrationconcentrated in vacuo
- temperaturecooled
- filtrationfiltered
出典と根拠
- ORDレコード
- ord-16c28acc53154fd4b712eda39e4ff9a7
- 出典データセット
- uspto-grants-1992_04
- 特許番号
- US05108485
反応ノート
読み込み中…