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Loss of Carboxy Group as CO2: Decarboxylation of β-Ketoacids

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Carboxylic acids, upon heating, undergo a decarboxylation reaction by releasing carbon dioxide gas. Monocarboxylic acids do not undergo decarboxylation easily. However, a silver salt of carboxylic acid reacts with bromine or iodine under high temperature to release carbon dioxide gas and forms halide with one less carbon. This reaction is called the Hunsdiecker reaction.

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Related Experiment Video

Updated: Jun 10, 2025

Light-driven Enzymatic Decarboxylation

Light-driven Enzymatic Decarboxylation

Published on: May 22, 2016

Electrochemical Decarboxylation Coupling Reactions.

Jiaxiu Liu¹, Haoran Li², Weisi Guo¹

¹State Key Laboratory Base of Eco-Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao, 266042, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|October 16, 2024

Summary

This summary is machine-generated.

Electrochemical decarboxylation offers a sustainable method for forming chemical bonds using carboxylic acids. This green chemistry approach avoids harsh reagents and is compatible with diverse functional groups.

Keywords:

Decarboxylation Electro-organic synthesis Electrochemistry Electrode materials Functional group transformation

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Area of Science:

Organic Chemistry
Green Chemistry
Electrochemistry

Background:

Carboxylic acids are stable, inexpensive, and readily available synthetic feedstocks.
They are recognized as environmentally friendly coupling agents in organic synthesis.
Electrochemical methods offer a sustainable alternative to traditional catalytic reactions.

Purpose of the Study:

To summarize recent advances in electrochemical decarboxylation reactions.
To highlight the advantages of electrochemical decarboxylative transformations.
To elucidate the utility of these methods in constructing chemical bonds.

Main Methods:

Electrochemical decarboxylation of carboxylic acids and their derivatives (e.g., NHPI).
Exploration of reactions for forming carbon-carbon and carbon-heterocarbon bonds.
Assessment of functional group tolerance under electrochemical conditions.

Main Results:

Electrochemical decarboxylation provides an effective route for C-C and C-heteroatom bond formation.
These reactions proceed without the need for oxidants or strong bases.
The method demonstrates broad functional group compatibility.

Conclusions:

Electrochemical decarboxylation is a sustainable and versatile strategy in organic synthesis.
It offers advantages over traditional transition metal and photochemistry-mediated reactions.
This technique facilitates efficient bond construction with minimal environmental impact.