SYNTHESES OF NOVEL α,β-UNSATURATED CHROMIUM FISCHER CARBENE COMPLEXES USING β-BROMOSTYRENE

Abstract

Syntheses of α,β-unsaturated neutral Chromium Fischer carbene complexes bearing alkoxy groups as donor substituents have been explored. Treating β-bromostyrene with a base and chromium hexacarbonyl followed by alkylation with an alkyl iodide produced the alkoxystyryl carbene complexe 1 in modest yield. The results however did not show significant variation in the yield of 1 with the size of the side chain R. Owing to their resemblance to α,β-unsaturated carbonyl compounds, these compounds can provide very useful protocols for the synthesis of organic compounds.