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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1788618Generated: November 3, 2026

Diethylene Glycol → 1-Bromo-4-pentylbenzene

https://huagongshe.com/reaction/1788618

Reaction equation

Participants

RoleNameHCIDCharge
ReactantDiethylene GlycolHCID 8117—
ReactantPotassium HydroxideHCID 14797—
Reactant4'-BromovalerophenoneHCID 81717—
SolventWaterHCID 962—
Product1-Bromo-4-pentylbenzeneHCID 273559985.1%

Reaction Conditions

Temperature180 °C

Reaction Steps

95 g (0.39 mol) of 4-pentanoylbromobenzene, 300 ml of diethyleneglycol, 40 ml (0.80 mol) of 100% hydradine hydrate and 45 g (0.80 mol) of potassium hydroxide were heated at 130° C. for 1 hour and then at 180° C. with stirring for 3 hour. Water was added to the reaction solution and the organic layer was extracted with chloroform. After washing the extracted layer with water, the chloroform was removed by distillation. Then the residue was distilled under reduced pressure to yield 75.4 g of 4-pentylbromobenzene having at b.p. 87° to 90° C./2 mmHg.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04684220
Source datasetuspto-grants-1987_08
ORD IDord-5f3fca7fc7f642fd8856543eb8ea740b
Source noteuspto-grants-1987_08