Ethanol → Ethyl 2-hydroxy-γ-oxobenzenebutanoate

反応式

[OH:1][C:2]1[CH:14]=[CH:13][CH:12]=[CH:11][C:3]=1[C:4]([CH2:6][CH2:7][C:8]([OH:10])=[O:9])=[O:5].S(=O)(=O)(O)O.C(Cl)(Cl)Cl.[CH2:24](O)[CH3:25]>>[OH:1][C:2]1[CH:14]=[CH:13][CH:12]=[CH:11][C:3]=1[C:4]([CH2:6][CH2:7][C:8]([O:10][CH2:24][CH3:25])=[O:9])=[O:5]

参加物

反応物 4

HCID 702Ethanol

HCID 1118Sulfuric Acid

HCID 6212Chloroform

HCID 30160863-(2-Hydroxybenzoyl)propionic acid

生成物 1

HCID 20352582Ethyl 2-hydroxy-γ-oxobenzenebutanoate

実験手順

A solution of 3-(o-hydroxybenzoyl)propionic acid (18.8 g.) in ethanol (120 ml.) was treated with concentrated sulphuric acid (1 ml.) and the mixture heated at reflux temperature for 12 hours. It was cooled, poured into ice-water (350 ml.) and the oily solid isolated with chloroform. It (18.6 g.) was purified by distillation at reduced pressure and had bp 112°-113°C at 0.1 mm; nD24.5 = 1.5301.