Synergistic Pd/Cu catalysis was used to achieve regio- and stereoselective borylation of allenylic carbonates, offering a straightforward strategy to produce 2-boryl 1,3-butadienes.
Iodobenzene and tetrakis(triphenylphosphine)palladium(0) [(C6H5)3P]4Pd catalyse a newsynthesis of 1,1-dialkylbuta-1,3-dienes, starting from 1,1-diethoxybut-2-ene and trialkylboranes, in the presence of Schlosser's superbase LIC-KOR.