Electrosynthesis of Trisubstituted 2-Oxazolines via Dehydrogenative Cyclization of β-Amino Arylketones
摘要:
An electrochemically intramolecular functionalization of C-(sp(3))-H bonds with masked oxygen nucleophiles was developed. With IU as the catalyst and electrolyte, diverse trisubstituted 2-oxazolines were constructed in good to excellent yields. This newly developed electrochemical dehydrogenalive approach features external oxidant-free and additive-free conditions.
VB1–Al2O3-catalyzed one-pot condensation of aromatic ketone, aromatic aldehyde, and amide
作者:Min Lei、Lei Ma、Lihong Hu
DOI:10.1016/j.tetlet.2010.07.008
日期:2010.9
A novel and green approach for the efficient synthesis of β-amido ketones using VB1–Al2O3 as a heterogeneous catalyst for the first time from an aldehyde, enolizable ketones, and an amide in EtOH is described. The present methodology has several advantages from the economical and environmental points of view, such as simple procedure, low catalyst loading, high atom economy, and good yields.
描述了一种新颖且绿色的方法,首次使用VB 1 -Al 2 O 3作为多相催化剂从乙醛,可烯化的酮和酰胺在EtOH中有效合成β-酰胺基酮。从经济和环境的观点来看,本方法具有若干优点,例如操作简单,催化剂用量低,原子经济性高和产率高。
One-pot preparation of β-amido ketones/esters in a three-component condensation reaction using magnesium hydrogensulfate as an effective and reusable catalyst
three-component condensation of an aryl aldehyde, an enolizable ketone or β-keto ester, acetyl chloride, and acetonitrile or benzonitrile in the presence of magnesium hydrogensulfate as an active, recoverable, and reusable green catalyst is described for the synthesis of β-amido ketones/esters at room temperature. The key features of this methodology are simplicity, mild reaction conditions, and high
Facile and diastereoselective synthesis of β-acetamido ketones and keto esters via direct Mannich-type reaction
作者:Hui Mao、Jieping Wan、Yuanjiang Pan
DOI:10.1016/j.tet.2008.11.071
日期:2009.1
A Mannich-type three-component reaction involving aldehydes, acetamide, and enolizable ketones or β-keto esters for the preparation of β-acetamido carbonyl compounds in the presence of TMSCl is described. This newly developed protocol is operationally convenient, widely applicable, and highly diastereoselective.
ZrOCl2·8H2O: an efficient Lewis acid catalyst for the one-pot multicomponent synthesis of β-acetamido ketones
作者:Rina Ghosh、Swarupananda Maiti、Arijit Chakraborty、Santu Chakraborty、Alok K. Mukherjee
DOI:10.1016/j.tet.2006.02.037
日期:2006.4
Aromatic aldehydes were reacted in one-pot with enolisable ketones, acetonitrile and acetyl chloride at ambient temperature in the presence of ZrOCl2·8H2O to furnish the corresponding β-acetamidoketones in very good to excellent yields. X-ray crystallographic analysis of one anti-β-acetamido ketone exhibited a two-dimensional supramolecular framework by a combination of N–H⋯O, C–H⋯O and C–H⋯π (arene)
CuSO<sub>4</sub> · 5H<sub>2</sub>O: A Novel, Green, Reusable, and Environmentally Friendly Catalyst for the One-Pot, Four-Component Synthesis of<font>β</font>-Acetamido Carbonyl Compounds
作者:Farahnaz K. Behbahani、Neda Doragi、Majid M. Heravi
DOI:10.1080/00397911.2010.529354
日期:2012.3.1
Abstract Multicomponent reactions for the synthesis of β-acetamido carbonyl compounds have been gained considerable attention in organic synthesis. In this articles, aromatic aldehydes have been employed in a one-pot reaction with enolizable ketones, acetonitrile, benzonitrile, and acetyl chloride in the presence of copper(II) sulfate petahydrate at ambient temperature to afford the corresponding β-acetamido
摘要 β-乙酰氨基羰基化合物的多组分反应在有机合成中受到了广泛关注。在这篇文章中,在环境温度下,在五水硫酸铜 (II) 存在下,芳香醛与可烯醇化的酮、乙腈、苄腈和乙酰氯进行一锅反应,得到相应的 β-乙酰氨基酮。产量。报告了新化合物。使用现成的五水硫酸铜 (II) 作为可重复使用和可回收的催化剂,使该过程变得非常简单、方便且环保。图形概要