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- Title
(3+3)‐Annulation of Carbonyl Ylides with Donor–Acceptor Cyclopropanes: Synergistic Dirhodium(II) and Lewis Acid Catalysis.
- Authors
Petzold, Martin; Jones, Peter G.; Werz, Daniel B.
- Abstract
The first (3+3)‐annulation process of donor–acceptor cyclopropanes using synergistic catalysis is reported. The Rh2(OAc)4‐catalyzed decomposition of diazo carbonyl compounds generated carbonyl ylides in situ. These 1,3‐dipoles were converted with donor–acceptor cyclopropanes, activated by Lewis acid catalysis, to afford multiply substituted pyran scaffolds in high yield and diastereoselectivity. Extensive optimization studies enabled access to 9‐oxabicyclo[3.3.1]nonan‐2‐one and 10‐oxabicyclo[4.3.1]decen‐2‐ol cores, exploiting solvent effects on intermediate reactivity.
- Subjects
CARBONYL ylides; CYCLOPROPANE; LEWIS acids; RING formation (Chemistry); THIONES
- Publication
Angewandte Chemie, 2019, Vol 131, Issue 19, p6291
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201814409