期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 19, 页码 6943-6951出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja411942h
关键词
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资金
- MICINN
- Regional Government of Andalucia [P09-FQM-4571]
- Spanish MICINN [CTQ-2011.22455]
- University of Granada (CEI-BIOTIC)
- Factoria de Cristalizacion, CONSOLIDER INGENIO
We describe a new strategy to control the number of cyclization steps in bioinspired radical (poly)cyclizations involving epoxypolyenes containing keto units positioned along the polyene chain. This approach provides an unprecedentedly straightforward access to natural terpenoids with pendant unsaturated side chains. Additionally, in the case of bi- and tricyclizations, decalins with cis stereochemistry have been obtained as a consequence of the presence of the ketone. The preferential formation of cis-fused adducts was rationalized using DFT calculations. This result is completely unprecedented in biomimetic cyclizations and permits the access to natural terpenoids with this stereochemistry, as well as to non-natural analogues.
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