An expedient approach to synthesize fluorescent 3-substituted 4H-quinolizin-4-ones via (η<sup>4</sup>-vinylketene)-Fe(CO)<sub>3</sub> complexes
作者:Alfredo Rosas-Sánchez、Rubén A. Toscano、José G. López-Cortés、M. Carmen Ortega-Alfaro
DOI:10.1039/c4dt03021d
日期:——
From simple starting materials, an efficient methodology for the synthesis of 3-substituted 4H-quinolizin-4-ones using (η4-vinylketene)-Fe(CO)3 complexes as key intermediates was developed. Fluorescent properties and quantum yields were determined.
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
A simple and convenient method for the synthesis of cyclobutenediones from alkynes using new Fe(CO)5/NaH/MeI reagent system
作者:Mariappan Periasamy、Mallesh Beesu、D. Shyam Raj
DOI:10.1016/j.jorganchem.2008.05.033
日期:2008.8
Iron carbonyl complexes prepared in situ using the Fe(CO)5/NaH/MeI reagent combination and alkynes at 25 °C give the corresponding cyclobutenediones in 50–65% yields after CuCl2 · 2H2O oxidation.
在25°C下使用Fe(CO)5 / NaH / MeI试剂组合和炔烃原位制备的羰基铁络合物在CuCl 2 ·2H 2 O氧化后以50-65%的产率得到相应的环丁二烯。
Facile Addition of Dichloroketene to Acetylenes Mediated by Zinc and Ultrasound
作者:M. Sharon、A. Parker、Carmelo J. Rizzo
DOI:10.1080/00397919508011825
日期:1995.9
Abstract The addition of dichloroketene, generated from trichloroacetyl chloride, zinc dust and ultrasound, to terminal and internal acetylenes is reported. This procedure is a more convenient alternative to Zn-Cu couple.
Stereoselective γ-Olefination of Substituted Cyclobutenediones by Organocatalysis
作者:Mariappan Periasamy、Mallesh Beesu
DOI:10.1055/s-0031-1289879
日期:2011.12
Methods are described for the stereoselective synthesis of alkenyl-substituted cyclobutenediones from alkyl-substituted cyclobutenediones and aldehydes in 70-91% yields using pyrrolidine as catalyst under mild reaction conditions. cyclobutenediones - γ-olefination - organocatalysis