[2+2] Cycloaddition reactions of cationic iron vinylidene complexes
β Scribed by Anthony G.M. Barrett; Michael A. Sturgess
- Book ID
- 104218002
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 161 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
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## Abstract Recent progress in the synthesis of benzene and 1,3βcyclohexadiene derivatives, and heterocyclic compounds such as pyridines, pyridones, pyrans, pyrimidine diones, etc, has been reviewed. The general mechanistic aspects of the [2+2+2] cycloaddition reaction are discussed. The asymmetric
1-chloroalkynes and 1-bromohexyne undergo cycloaddition reactions with ethoxyvinylketeneiron(0) complexes to form chloro and bromocatechols. With most substituents, the halogen is incorporated ortho to the phenolic hydroxyl group regioselectively. With chloroethyne, chlorohexyne, and methyl chloropr