Journal
CHEMISTRY-AN ASIAN JOURNAL
Volume 13, Issue 8, Pages 913-917Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/asia.201800053
Keywords
annulation; arylation; caborane anion; copper; palladium
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Funding
- JSPS KAKENHI [17H06173]
- Asahi Glass Foundation
- Kobayashi International Scholarship Foundation
- NAGASE Science & Technology Development Foundation
- Sumitomo Foundation
- Tokyo Biochemical Research Foundation
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We have developed a one-pot annulation reaction of monocarba-closo-dodecaborate with cyclic diaryliodonium salts to afford biaryl-fused derivatives. Aryl functionalities are introduced at both the 1-carbon and unreactive ortho-boron vertices of the sigma-aromatic carborane cage without the need for pre-functionalization. DFT calculations revealed that the palladium-catalyzed C-B bond-formation step in this process proceeds through a concerted metalation-deprotonation (CMD)-type pathway for the B-H bond disconnection on the aromatic cage, though such bonds are generally regarded as hydridic.
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