Mg/PbBr₂ Bimetal Redox-Promoted Stannation of Propargyl, Allyl, Vinyl, and Aryl Halides

Tanaka, H.; Hai, A. K. M. A.; Ogawa, H.; Torii, S. Synlett 1993, 835.

Reductive coupling of propargyl bromides with tributylstannyl chloride was performed in a regioselective manner by the aid of magnesium metal and a catalytic amount of lead(II) bromide in THF, affording allenyltributylstannanes. In a similar manner, allyl-, vinyl-, and aryl-tributylstannanes were prepared from the corresponding halies.