A simple synthesis of unsymmetrical buta-1,3-diynes by cross-coupling
of terminal alkynes with 1-bromoalkynes in the presence of copper(I)
iodide and tris(o-tolyl)phosphine was
developed that gives good yields under simple and mild reaction
conditions. The scope and limitations of the cross-coupling reaction
were investigated.
alkynes - catalysis - cross-coupling - alkadiynes