Novel rhenium(I) catalysts for the isomerization of propargylic alcohols into α,β-unsaturated carbonyl compounds: an unprecedented recyclable catalytic system in ionic liquids.

Carbonyl rhenium(I) complexes are efficient catalysts for the regioselective isomerization of terminal propargylic alcohols into α,β-unsaturated aldehydes or ketones which can be used as an unprecedented recyclable catalytic system (up to 10 consecutive runs) in the ionic liquid [BMIM][PF(6)]. This journal is © The Royal Society of Chemistry 2011