Chemistry of Acylals, Part IV: BF3-Catalyzed Formation of Substituted α,α′-Bis(arylmethylidene)cycloalkanones from Acylals and 1-Cycloalkenyl Trimethylsilyl Ethers - Sydnes, Leiv K; Pedersen, Gry S; Holmelid, Bjarte; Sandberg, Marcel (Synthesis, 2007)