期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202117524
关键词
Deoxy-Breslow Intermediate; N-Heterocyclic Carbenes; Organocatalysis; Pyridinium Substrates; Umpolung
资金
- BBSRC (Doctoral Training Partnership, University of Manchester)
- AstraZeneca
This study demonstrates that pyridinium ions can undergo NHC addition and intramolecular C-C bond formation through a deoxy-Breslow intermediate, presenting a new pathway for catalytic reactions of non-aldehyde substrates.
Umpolung N-heterocyclic carbene (NHC) catalysis of non-aldehyde substrates offers new pathways for C-C bond formation, but has proven challenging to develop in terms of viable substrate classes. Here, we demonstrate that pyridinium ions can undergo NHC addition and subsequent intramolecular C-C bond formation through a deoxy-Breslow intermediate. The alkylation demonstrates, for the first time, that deoxy-Breslow intermediates are viable for catalytic umpolung of areniums.
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