Abstract
In this review, a brief outline of synthetic methods toward cyclopropenes is provided. Main emphasis is placed on transformations of cyclopropenes proceeding with preservation of the ring, with a spotlight on recent developments in this area.
1 Introduction
2 Synthesis of Cyclopropenes: An Overview
3. Chemistry of Cyclopropenes
3.1 Formal Substitution Reactions
3.1.1 Cyclopropenes as Nucleophilic Species
3.1.2 Cyclopropenes as Electrophilic Species
3.1.3 Substitution via Cyclopropenylium Species
3.2 Additions across the Double Bond of Cyclopropene
3.2.1 Additions of H-H Moiety
3.2.2 Additions of H-C Moieties
3.2.3 Additions of H-M Moieties
3.2.4 Additions of C-M Moieties
3.2.5 Additions of M-M Moieties
3.3 Cycloadditions
3.3.1 [2+1] Cycloadditions
3.3.2 [3+2] Cycloadditions
3.3.3 [2+2+1] Cycloadditions
3.3.4 [4+2] Cycloadditions
4. Conclusions
Key words
cyclopropenes - hydrometalation - carbometalation - cycloaddition
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