A novel approach to the formation of quaternary centres and the introduction of angular substituents by using tricarbonyldieneiron complexes
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 1
- No. 18,p. 2069-2074
- https://doi.org/10.1039/p19770002069
Abstract
Tricarbonyl-(4-methoxy-1-methylcyclohexadienylium)iron hexafluorophosphate (2) undergoes exclusive addition of carbanions derived from 1,3-dicarbonyl compounds at the methylated ring position. The directing effect of the methoxy-substituent in the cation of (2) has been applied successfully to the bicyclic analogues tricarbonyl-1,3–6-η-4-methoxybicyclo[4.4.0]deca-3,5-dienylium)iron hexafluorophosphate (8), and tricarbonyl-(1,3-6-η-4-methoxybicyclo[4.3.0]nona-3,5-dienylium)iron hexafluorophosphate (17), reactions of which with similar carbanions provide an efficient method of introduction of angular substituents.Keywords
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