Diastereoselective Oxidative Addition of Allyl Chloride to Planar-Chiral Cyclopentadienyl−Ruthenium Complexes

The reaction of planar-chiral cyclopentadienyl−ruthenium complexes with allyl chloride at room temperature resulted in the diastereoselective formation of π-allyl−ruthenium complexes, in which the chirality at the Ru center depended on the substituent at the 4-position of the cyclopentadienyl group. Epimerization at the Ru center of π-allyl complexes at 90 °C suggested that the diastereoselectivity was under kinetic control.