Synthesis of Internal gem-Diborylalkanes by Copper-Catalyzed Double Hydroboration of Conjugated Internal Alkynes

Background: Geminal diboryl reagents have attracted considerable attention due to their unique reactivities. Double hydroboration of alkynes is a convenient and useful method for the synthesis of diborylalkanes. However, the double hydroboration is applied mainly to terminal alkynes. Keywords: Copper, catalysis, hydroboration, alkyne, diboryl compound, conjugated carbonyl compound.