Tricarbonylallyliron cations as intermediates in the Friedel–Crafts acylation of tricarbonylbutadieneiron
Abstract
The intermediates (RCO·CH2CH[graphic omitted]CH[graphic omitted]CH2)-Fe(CO)3+ AlCl4–(or PF6–) probably have the acyl oxygen co-ordinated to iron and lose protons stereoselectively to give syn- or anti-tricarbonyl-acylbutadiene-iron depending on the base used.