Ethyl bromoacetate → [(Quinolin-4-yl)oxy]acetic acid
反応式
[OH:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:19][C:20]([O:22]CC)=[O:21]>CC(C)=O>[N:5]1[C:6]2[C:11](=[CH:10][CH:9]=[CH:8][CH:7]=2)[C:2]([O:1][CH2:19][C:20]([OH:22])=[O:21])=[CH:3][CH:4]=1参加物
5
実験手順
The mixture of 4-hydroxyquinoline (290 mg, 2.0 mmol), potassium carbonate (910 mg, 6.6 mmol), ethyl bromoacetate (500 mg, 3.0 mmol) and acetone (25 ml) was refluxed for 8 h. After cooling, the mixture was filtered to remove potassium carbonate. The filtrate was concentrated under reduced pressure. To this residue, 10 ml of dioxane and 14 ml 5% sodium hydroxide solution was added. After the mixture was stirred at room temperature overnight, it was acidified with concentrated hydrochloric acid to pH 3, and then extracted three times with ethyl acetate (20 ml each). Water layer was placed in cold room, and solid came out. The crystals were filtered with suction and washed with water, and then dried to give 120 mg quinoline-4-oxyacetic acid as gray crystals, mp 274-276° C.