Abstract Borylative allyl–allyl coupling using allenes, bis (pinacolato) diboron, and allyl phosphates has been developed in the presence of a copper catalyst bearing an N- heterocyclic carbene ligand. The reaction affords boryl-substituted 1, 5-diene derivatives in good to high yields with high regioselectivity and Z selectivity.
[Allan, Graham; Carnell, Andrew J.; Hernandez, Maria Luisa Escudero; Pettman, Alan Journal of the Chemical Society, Perkin Transactions 1, 2000 , # 20 p. 3382 - 3388]