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Reaction of ferrocenylcarbene complexes of Cr, Mo and W with alkynes: Synthesis of ferrocenylcyclobutenones, ferrocenylfurans and ferrocenylketoesters

2001-07-09
Zora, Metin
ÜNSAL GÜNGÖR, Elif
Ferrocenylcarbene complexes of Cr, Mo and W react with alkynes to produce cyclobutenones, furans and/or ketoesters. The reaction is quite sensitive to the substituents of the alkyne, regardless of the identity of the metal. Cyclobutenones are formed only in the reactions of diphenylacetylene, a rare occurrence for metal carbene complexes. Ketoesters are secondary reaction products and result From oxidation of furan derivatives during the course of the reaction and/or silica-gel chromatography.