Recent Progress in B—H Bond Functionalization of nido-Carboranes
nido-Carboranes are versatile building blocks in medicine,materials science,and organometallic/coordination chemistry.Recently,direct B—H activation and functionalization of nido-carboranes have received much attention.Achieving regioselectivity in polyhedral cage B—H activation among ten chemically similar B—H vertices is a long-standing challenge in carborane chemistry.In this context,the activation of exo-cage B—H vertices on the open C2B3 pentagonal plane of nido-carboranes has been extensively studied.However,few direct activation reactions of B—H vertices that are located on the closed polyhedral sphere in nido-carborane have been reported.The recent progress on the regioselective B—H bond function-alization reaction of nido-carboranes is summarized.This topic is categorized into open plane exo-B—H activation and poly-hedral sphere B—H activation.
carboranesB—H bond activationregioselectivityfunctionalizationdirecting group
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