Cyclopropanation of alkenes with ethyl diazoacetate catalysed by ruthenium porphyrin complexes

Abstract

Ruthenium porphyrin complexes are active catalysts for the cyclopropanation of styrene derivatives by ethyl diazoacetate with good to very good diastereoselectivity; moderate enantiomeric excesses (34%) are observed using a chiral porphyrin as catalyst.