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Neighboring group migration in enzyme-mediated halohydrin formation.
Biochemical and Biophysical Research Communications
|February 10, 1983
Summary
Enzymatic halogenation of allyl halides shows intramolecular halogen participation. Allylic halogen migration occurred during chlorination of allyl bromide but not bromination of allyl chloride.
Area of Science:
- Biochemistry
- Organic Chemistry
Background:
- Enzymatic halogenation reactions are crucial in organic synthesis.
- Allyl halides are reactive substrates with potential for intramolecular reactions.
Purpose of the Study:
- To investigate the influence of intramolecular allylic halogen participation during enzymatic halogenation of allyl halides.
- To compare enzymatic halogenation outcomes with known non-enzymatic reactions.
Main Methods:
- Enzymatic chlorination of allyl bromide.
- Enzymatic bromination of allyl chloride.
- Analysis of reaction products to determine halogen migration.
Main Results:
- Intramolecular participation of the allylic halogen was observed.
- Allylic halogen migration to the central carbon occurred during enzymatic chlorination of allyl bromide.
- No allylic halogen migration was observed during enzymatic bromination of allyl chloride.
Conclusions:
- Enzymatic halogenation of allyl halides is influenced by the substrate's allylic halogen.
- The observed intramolecular participation parallels neighboring group effects in non-enzymatic halogenation.
- Substrate-specific halogen migration occurs during enzymatic halogenation.