An expedient stereoselective route to the ACE tricyclic core of manzamine A via a palladium-catalysed arylative allene spirocyclisation cascade

Alison Hawkins, Pavol Jakubec, Alan Ironmonger, Darren J. Dixon

Tetrahedron Letters, Volume 54, Issue 5, 30 January 2013, Pages 365–369

http://dx.doi.org/10.1016/j.tetlet.2012.10.111