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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 733429Generated: October 27, 2026

Hydrogen Bromide → 1-Bromo-1-(3,4-dimethoxyphenyl)ethene

https://huagongshe.com/reaction/733429

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrogen BromideHCID 260—
Reactant4-Ethynyl-1,2-dimethoxybenzeneHCID 3616421—
Product1-Bromo-1-(3,4-dimethoxyphenyl)etheneHCID 1608536187%

Reaction Steps

According to the General Procedure D, HBr (33% in acetic acid, 1.11 ml, 0.50 g, 6.17 mmol) and 3,4-dimethoxyphenylacetylene (1.00 g, 6.17 mmol) are converted to give after workup and chromatography (SiO2, PE/EE 5:1, Rf=0.41) the title compound (1.30 g, 5.35 mmol, 87%) as a brown oil; C10H11BrO2 (243.10).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07589205B2
Source datasetuspto-grants-2009_09
ORD IDord-26102aedb54047c39585e130260fd5c7
Source noteuspto-grants-2009_09