When Organocatalysis Meets Transition-Metal Catalysis

In the past several years, applications of transition metal complexes in tuning the reactivity of organocatalyst-promoted transformations have attracted increasing attention in the synthetic community. Efforts in this direction have led to the discovery of unprecedented reactivities, which are not accessible through the use of either of these two catalytic systems separately. The concept continues to develop and offers huge potential. This microreview describes and summarizes recent progress in this field, focusing on discussion of the enhancement and diversification of reactivity patterns in organocatalysis through the deployment of transition metal complexes.