ChemInform Abstract: Microwave‐Assisted Copper‐Powder‐Catalyzed Coupling and Cyclization of β‐Bromo‐α, β‐unsaturated Carboxylic Acids with 1, 3‐Diketones Leading to 2H‐Pyran‐2‐ones. Issue 24 (June 2015) - Ho, Son Long; Cho, Chan Sik; Sohn, Ho‐Sang