In contrast to the ene behavior of allenes in Pauson-Khand reactions and other cyclization reactions, 1,6-allenynes undergo unprecedented carbocyclization followed by regioselective addition of organoboronic acids in the presence of Pd(OAc)2 and tri-t-butyl phosphine under mild reaction conditions. © 2005 Elsevier Ltd. All rights reserved.
Gupta, A. K., Rhim, C. Y., & Oh, C. H. (2005). Unprecedented carbocyclization of 1,6-allenynes on addition of organoboronic acids under Pd-catalysis. Tetrahedron Letters, 46(13), 2247–2250. https://doi.org/10.1016/j.tetlet.2005.02.020