New approach to the introduction of functionalised angular substituents via tricarbonyldieneiron complex intermediates

Abstract

The reaction of tricarbonyl(4-methoxy-1-methylcyclohexadienyl)iron hexafluorophosphate (1), or tricarbonyl(2–8a-η-3-methoxyhexahydronaphthyl)iron tetrafluoroborate (5) with cyanide anion results in addition of the nucleophile to the more electron-deficient terminus of the dienyl system, forming quaternary centres and angularly substituted compounds (2) and (6), respectively.