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DOI: 10.1055/s-2003-38674
Radical-Mediated Annulation Reactions
Publication History
Publication Date:
16 April 2003 (online)
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Abstract
Radical annulation sequences have proven to be versatile and expedient routes towards highly complex cyclic frameworks. The radical annulation reaction allows for the formation of multiple carbon-carbon bonds in a single operation with regio- and stereocontrol. This review covers annulation reactions that have been carried out by four different pathways.
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1 Introduction
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2 Atom or Group Transfer Annulations
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3 Reductive Annulations
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3.1 Energy Diagram for Annulation Reaction
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3.2 Hybrid Radical-Ionic Annulation Sequence
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4 Fragmentation-Terminated Annulations
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4.1 Three-Component [2+2+2] Annulation
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5 Oxidative Radical Annulations
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5.1 Manganese(III) as an Oxidant
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5.2 Oxidative Radical Additions to Heteroaromatics
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6 Conclusions
Key words
annulation - atom transfer - fragmentation - Lewis acid - radical reaction
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