A Convenient Synthesis of Aryl Ferrocenylethynyl Ketones and 2-Ferrocenyl-4H-chromen-4-ones via Palladium-Catalyzed Carbonylation Coupling - Ma, Wenbing; Li, Xiaolong; Yang, Jingmu; Liu, Zenglu; Chen, Baohua; Pan, Xinfu (Synthesis, 2006)