Reactive Iron Carbonyl Reagents via Reaction of Metal Alkoxides with Fe(CO)<sub>5</sub> or Fe<sub>2</sub>(CO)<sub>9</sub>: Synthesis of Cyclobutenediones via Double Carbonylation of Alkynes
作者:Mallesh Beesu、Mariappan Periasamy
DOI:10.1021/jo102104a
日期:2011.1.21
Alkoxy bases such as t-BuOK react with Fe(CO)5 to give reactive iron carbonyl intermediates that in turn react with alkynes at 70 °C in THF to give 1,2-cyclobutenediones in 70−93% yields after CuCl2·2H2O oxidation. A novel 1,2-diacyloxyferrole derivative was isolated in the reaction of diphenylacetylene with Fe(CO)5/t-BuOK in the presence of acetyl chloride in contrast to the formation of a 1,4-diacyloxyferrole