4-Aryl- and 4-Vinyl-2,2-Dialkyl-3-chromenes from Tertiary 3-(o-Bromophenyl)propynols via a Palladium-Catalyzed Hydroarylation/Hydrovinylation-Cyclization Sequence - Arcadi, Antonio; Cacchi, Sandro; Fabrizi, Giancarlo; Marinelli, Fabio; Verdecchia, Mirella (Synlett, 2006)