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Synfacts 2015; 11(2): 0153
DOI: 10.1055/s-0034-1379825
DOI: 10.1055/s-0034-1379825
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
Asymmetric Alkylation via Photoredox Pathway Using a Chiral Iridium Complex
Weitere Informationen
Publikationsverlauf
Publikationsdatum:
19. Januar 2015 (online)
Key words
photoredox catalysis - enantioselective alkylation - 2-acyl imidazoles - visible light - iridiumSignificance
The authors demonstrate a unique example of asymmetric redox catalysis achieved by visible light. Two catalytic cycles are connected by the key intermediate, an iridium(III) enolate complex, which is an active photosensitizer generated in situ.
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Comment
This process provides very mild conditions and excellent yields and enantioselectivities. The reaction proceeds via a photoredox mechanism, supported by X-ray, radical trapping, luminescence quenching, and interval experiment analyses.
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