1,4-Dihydroxy-2-naphthoic acid → 1-Hydroxy-4-(beta,gamma-dibromopropyloxy)-2-naphthoic acid
Reaktionsgleichung
[OH:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([OH:12])=[CH:4][C:3]=1[C:13]([OH:15])=[O:14].[Br:16][CH:17]([CH2:20][Br:21])[CH2:18]O>>[OH:1][C:2]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]([O:12][CH2:18][CH:17]([Br:16])[CH2:20][Br:21])=[CH:4][C:3]=1[C:13]([OH:15])=[O:14]Komponenten
3
Reaktionsbedingungen
- Temperatur
- 90 °C
Versuchsvorschrift
60 g (0.3 mol) of 1,4-dihydroxy-2-naphthoic acid was added to 150 ml of 2,3-dibromopropanol and, under heating at 90° C. with stirring, hydrogen chloride gas was bubbled in the mixture during a reaction period of 2 hours. The mixture was cooled to 10° to 20° C. and the crystals precipitated were collected by filteration to obtain 42.4 g (35% yield) of 1-hydroxy-4-(β,γ-dibromopropyloxy)-2-naphthoic acid.