Platinum-Catalyzed Diboration of Alkynes by 1,8-Diaminonaphthalene-Protected Diboronic Acid (B(dan)).

The diboration of alkynes by 1,8-diaminonaphthalene-protected diboronic acid (B(dan)) proceeded smoothly in the presence of a platinum catalyst, and 1,2-diborylalkenes were isolated in up to 94% yield. The use of an appropriate solvent and ligand was critical for the progress of the reaction. The derivatization of 1,2-diborylalkenes was briefly examined.