Understanding the Scope of Feist-Bénary Furan Synthesis: Chemoselectivity and Diastereoselectivity of the Reaction Between α-Halo Ketones and β-Dicarbonyl Compounds
作者:Yi Peng、Juan Luo、Qiang Feng、Qiang Tang
DOI:10.1002/ejoc.201600975
日期:2016.10
application of a Paal–Knorr synthesis. In this manuscript, we investigate the chemoselectivity and diastereoselectivity of furansynthesisfrom α-halo ketones and β-dicarbonyl compounds, by carrying out the separation and characterization of the intermediates involved in the reaction. Additionally, a one-pot Feist–Benaryfuransynthesisfrom α-halo ketones and β-dicarbonyl compounds without any base or solvent
Ionic liquid promoted interrupted Feist–Benary reaction with high diastereoselectivity
作者:Brindaban C. Ranu、Laksmikanta Adak、Subhash Banerjee
DOI:10.1016/j.tetlet.2008.05.083
日期:2008.7
A basic ionic liquid, 1-butyl-3-methylimidazolium hydroxide promotes the interrupted Feist-Eenary reaction at room temperature under organic solvent-ftee conditions to produce a variety of substituted hydFOxydihydrofurans. The hydroxydihydrofurans are converted to furans (Feist-Benary products) using the ionic liquid, 1-methyl-3-pentylimidazolium bromide at 70-75 degrees C. The reactions are very clean, high yielding and highly stereoselective. (c) 2008 Elsevier Ltd. All rights reserved.
An efficient synthesis of tetrahydroindoles with different substituents in position I is described. Microwave-assisted aminolysis of 4-oxo-4,5,6,7-tetrahydrobenzofuran With different primary amines gives the corresponding tetrahydroindoles in few minutes. All attempts to use microwave dielectric heating to reduce the time required for preparation of 4-oxo-4,5,6,7-tetrahydrobenzofuran, starting from 1,3-cyclohexandione were on the other hand unsuccessful, demonstrating that in some cases, long time conventional heating may be superior to microwaves. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis of furan and dihydrofuran derivatives via Feist–Benary reaction in the presence of ammonium acetate in aqueous ethanol
An efficient synthesis of dihydrofurans and furans by a reaction between 1,3-dicarbonyl compounds and ethyl bromopyruvate, ethyl 2-chloroacetoacetate, or 3-chloroacetylacetone in the presence of ammonium acetate in aqueous ethanol is described. When the reaction was performed with a phenacyl bromide, O-alkylation of 1,3-dicarbonyl compounds occurred without cyclization.