ChemInform Abstract: Lewis‐Acid Catalyzed N‐Acyliminium Ion Cyclodimerization: Synthesis of Symmetrical 1, 4‐Dioxanes. Issue 26 (June 2015) - Ali, Bakhat; Zukerman‐Schpector, Julio; Ferreira, Fernando P.; Shamim, Anwar; Pimenta, Daniel C.; Stefani, Helio A.