Abstract
The transition-metal-catalyzed [2+2+2] cycloaddition
of alkynes is a useful and atom-economical method for the synthesis of
substituted benzenes. This comprehensive review covers the [2+2+2]-cycloaddition
reactions catalyzed by rhodium complexes. Applications of the rhodium-catalyzed [2+2+2]
cycloaddition
in the synthesis of functional organic compounds are also described.
1 Introduction
2 [2+2+2]-Cycloaddition
Reactions Catalyzed by Neutral Rhodium Complexes
2.1 Intermolecular Reactions
2.2 Intramolecular Reactions
3 [2+2+2]-Cycloaddition
Reactions Catalyzed by Cationic Rhodium Complexes
3.1 Intermolecular Reactions
3.2 Intramolecular Reactions
4 Synthetic Applications
4.1 Synthesis of Cyclophanes
4.2 Synthesis of Biaryls
4.3 Synthesis of Organophosphorus Compounds
4.4 Synthesis of Helicene-Like Molecules
4.5 Synthesis of Complex Biologically Active Compounds
4.6 Synthesis of Organic Materials
5 Summary and Outlook
Key words
alkynes - benzenes - catalysis - cycloaddition - rhodium
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