[(arene)Rh(cod)]+ complexes as catalysts for [5+2] cycloaddition reactions

Abstract

Within a few minutes at room temperature, intramolecular [5+2] cycloaddition reactions of vinylcyclopropanes and tethered alkenes or alkynes reach completion when arene-ligated rhodium(I) complexes are used as catalysts (see scheme). In particular, naphthalene complex 1 was found to be an exceptionally effective and, in cases where comparisons have been made, preferred catalyst.