Abstract
Abstract This highlight review describes the recent development of an electrophile-triggered 1,2-metallate rearrangement of organoboronic ester ate-complex, which proceeds through 1,2-difunctionalization of carbon–carbon σ- and π-bonds, using strain energy as a driving force. Coupling reactions of small ring carbocyclic boronic esters, such as cyclopropyl-, bicyclo[1.1.0]butyl-, and cyclopropenyl-boronic ester, are summarized along with the proposed reaction mechanisms and representative examples.
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