ChemInform Abstract: An Unexpected Double Diels—Alder Reaction of (E)‐2‐Bromo‐4‐aryl‐1, 3‐pentadiene Involving [1, 5]‐Hydrogen Migration and HBr Elimination: Synthesis of Bicyclo[2.2.2]octene Derivatives. Issue 48 (December 2015) - Huang, Pingping; Liu, Lingyan; Chang, Weixing; Li, Jing