Quinoline → 2-Amino-4-hydroxybenzonitrile
反応式
[NH2:1][C:2]1[C:10]([C:11]#[N:12])=[CH:9][C:5](C(O)=O)=[C:4]([OH:13])[CH:3]=1.N1C2C(=CC=CC=2)C=CC=1>[OH-].[Na+]>[NH2:1][C:2]1[CH:3]=[C:4]([OH:13])[CH:5]=[CH:9][C:10]=1[C:11]#[N:12]参加物
4
反応条件
- 温度
- 160 °C
実験手順
4-Amino-5-cyano-2-hydroxybenzoic acid (2.1 g, 11.79 mmol) is added to a quinoline solution already heated to 160° C. (12 ml) and the reaction solution is stirred at 180° C. for a further hour. After cooling, it is diluted with about 50 ml of a 1N sodium hydroxide solution. The mixture is extracted with dichloromethane. Subsequently, the aqueous phase is adjusted to pH 6.5 with hydrochloric acid and extracted with ethyl acetate and methanol (as a solubilizer). The combined organic phases are dried over sodium sulphate. The desired product is obtained after concentrating the solvents in 76% yield (1.2 g).
後処理
- temperatureAfter cooling
- extractionThe mixture is extracted with dichloromethane
- extractionextracted with ethyl acetate and methanol (as a solubilizer)
- dry with materialThe combined organic phases are dried over sodium sulphate
出典と根拠
- ORDレコード
- ord-e578144a584348bbb5b70702975cc969
- 出典データセット
- uspto-grants-2011_01
- 特許番号
- US07863283B2
反応ノート
読み込み中…