Abstract
A squarate-based synthesis of ferrocenyl quinones is described. Thermolysis of ferrocenyl-substituted cyclobutenones, prepared from ferrocenyl cyclobutenediones and alkenyllithiums, affords hydroquinones, which furnish, upon oxidation, ferrocenyl quinones. Ferrocenyl cyclobutenediones have been prepared from known cyclobutenediones by nucleophilic addition of ferrocenyllithium followed by hydrolysis, Pd/Cu-cocatalyzed cross-coupling with (tri-n-butylstannyl)ferrocene or Friedel-Crafts alkylation with ferrocene.
| Original language | English |
|---|---|
| Pages (from-to) | 2237-2241 |
| Number of pages | 5 |
| Journal | Tetrahedron Letters |
| Volume | 44 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 3 Mar 2003 |
| Externally published | Yes |
Keywords
- Cyclobutenediones
- Cyclobutenols
- Cyclobutenones
- Electrocyclization
- Ferrocenes
- Ferrocenyl quinones
- Hydroquinones
- Oxidation