Synthesis of Dihydropyrans via Pd-Catalyzed Cyclization of 2-Allyl-1,3-dicarbonyl Compounds and Vinylic Triflates or Halides - Cacchi, Sandro; Fabrizi, Giancarlo; Larock, Richard C; Pace, Paola; Reddy, Vasavi (Synlett, 1998)