Direct one step preparation and 13C-NMR spectroscopic characterization of alpha-ferrocenyl carbocations derived from ferrocene and carbonyl compounds in trifluoroacetic acid medium1a
Reaction of aldehydes and ketones with ferrocene, in the presence of trifluoroacetic acid, afforded a series of stable long lived alpha-ferrocenylalkyl carbocations which were characterized by 13C-NMR spectroscopy. When this reaction was attempted using tetraphenylcyclopentadienone, quite unexpectedly the corresponding dihydro derivative 3 was isolated, in very good yield. Formation of this compound may require ferrocene acting as a reducing agent.
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| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Sociedade Brasileira de Química
1999
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000400010 |
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