Coupling of ferrocenyl chromium carbene complex with cyclobutenediones

2002-08-15
Zora, Metin
YÜCEL, Baris
Bekir Peynircioglu, N.
The coupling of ferrocenyl chromium carbene complex with cyclobutenediones leads to ferrocenyl-substituted 5-alkylidenefuranones and 4-cyclopentene-1,3-diones, methyl ferrocenoate and acetylferrocene in varying amounts. The scope and limitations of these processes are investigated. In comparison with the phenyl analog, ferrocenyl chromium carbene complex has been found to be less reactive. This is also supported by PM3 calculations. The coupling of ferrocenyl chromium carbene complex with cyclobutenediones produces ferrocenyl-substituted 5-alkylidenefuranones and 4-cyclopentene-1,3-diones, methyl ferrocenoate and acetylferrocene in varying amounts. In comparison with the phenyl analog, as supported by PM3 calculations, ferrocenyl chromium carbene complex has been found to be less reactive