The Reaction of Cyanogen Bromide with Dilithium Ethynylbis[trialkylborates]. A Novel Synthesis of Di-, Tri-, and Tetrasubstituted Ethenes Using Organoboranes
with readily prepared cobalt or titanium nanoparticles, under mild reaction conditions, led to the obtention of different reductive dimerization products depending on the nature of the transition metal used. Cobalt nanoparticles (CoNPs) allowed the selective transformation of the starting carbonylcompounds into vicinal diols, whereas the reaction promoted by titanium nanoparticles (TiNPs) led to the