Decarboxylative Halogenation of Organic Compounds.

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Decarboxylative halogenation (halodecarboxylation) is a key method for synthesizing organic halides.
• This reaction involves the selective cleavage of a carbon-carbon bond in carboxylic acids, releasing carbon dioxide.

Purpose of the Study:

• To review and analyze major approaches for halodecarboxylation of various acid types.
• To discuss the preparation of organic iodides, bromides, chlorides, and fluorides.
• To critically evaluate reaction features, selectivity, scope, and limitations.

Main Methods:

• Discussion of historic and modern halodecarboxylation methods.
• Analysis of substrate scope for alkanoic, alkenoic, acetylenic, and (hetero)aromatic acids.
• Presentation of mechanistic details where available.

Main Results:

• Comprehensive overview of methods for synthesizing diverse organic halides.
• Critical analysis of advantages, drawbacks, and limitations of different approaches.
• Highlighting mechanistic pathways, their generality, and uniqueness.

Conclusions:

• Decarboxylative halogenation is a versatile synthetic tool for organic halides.
• The review provides insights into current methodologies and future research directions.
• Understanding mechanisms aids in optimizing selectivity and substrate scope.