A Direct Synthesis of Alkenyl Alkylidene Bicyclo[3.1.0]hexane Derivatives via Ruthenium(II)-Catalysed Bicyclisation of Allenynes - Vovard-Le Bray, Chloé; Dérien, Sylvie; Dixneuf, Pierre H; Murakami, Masahiro (Synlett, 2008)