Recent Advances in Ruthenium(II)-Catalyzed C-H Bond Activation and Alkyne Annulation Reactions

In the last few decades, the transition metal-catalyzed activation of inert C-H bonds has led to a fundamental change in the field of synthetic chemistry. Most of these C-H activation reactions deal with simple functionalizations or additions. However, recent years have witnessed an increase of the transition metal-catalyzed activation of C-H bond and annulation reactions. These annulation reactions are appealing to the organic chemist as they afford highly valuable cyclic compounds in a rapid and sustainable manner from readily available compounds. This review article attempts to highlight the recent advances in the ruthenium metal-catalyzed C-H bond activation and alkyne annulation reactions.