Diboronyl esters

In terms of atom-economy a very attractive strategy for accessing arylboronic acids is the direct boronylation of arenes through a transition metal promoted C-H functionalization. In addition to the catalyst, a suitable boron donor is required, and both diboronyl esters and dialkoxyboranes are very appropriate in this role. The concept of this type of direct borylation was first demonstrated on alkanes using photochemical... 

Synthesis of Boronic Acids and their Esters 35 1.3.1.3 Coupling of Aryl Halides with Diboronyl Reagents... 

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