Abstract
Reaction of tricarbonyl(1–5-η-4-methoxy-1-methylcyclohexadienylium)iron hexafluorophosphate (1) with enolate anions of derivatives of methyl 2-oxocyclohexanecarboxylate and methyl 1-oxotetralin-2-carboxylate occurs with very high regioselectivity for the methylated dienylium terminus. The structure and stereochemistry of one of the products (18) was determined by X-ray crystallography and found to be in agreement with that derived from spectroscopic data.
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