# Darzens halogenation

> English word · Noun

## Definitions
1. The chemical synthesis of alkyl halides from alcohols via the treatment upon reflux of a large excess of thionyl chloride or bromide (SOX₂) in the presence of a small amount of a nitrogen base, such as a tertiary amine or pyridine or its corresponding hydrochloride or hydrobromide salt.

## Etymology
Discovered in 1911 by Auguste George Darzens.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/darzens-halogenation