Zirconium and Titanium Mediated Hydroboration of Alkenes and Alkynes

The transition metal-catalyzed hydroboration of alkenes and alkynes is one of the most efficient way for the production of boronate esters.This type of reaction is 100% atom economic, the starting material is readily available, and the products are diverse.It is noticed that most of the known catalytic systems are based on late-transition-metals such as Rh, Ir, Pd, Pt, Co, Fe and Cu.The use of early-transition-metals of zirconium and titanium, on the other hand, is very scarce.In this short review, the development of application in zirconium and titanium mediated hydroboration of alkene and alkyne is summarized, and the research trends of this area are also discussed.