I2-Catalyzed C–O Bond Formation and Dehydrogenation: Facile Synthesis of Oxazolines and Oxazoles Controlled by Bases
摘要:
A general method for the synthesis of oxazolines and oxazoles was developed through I-2-catalyzed C-O bond formation and dehydrogenation with the same oxidant, TBHP. By simply tuning reaction bases, either oxazolines or oxazoles were selectively produced from beta-acylamino ketones.
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
CuFe2O4 nanoparticles were prepared by co-precipitation method. After the characterization of nanoparticles by XRD, SEM, EDS and TEM, their catalyst activity was investigated in the synthesis of β-acetamido ketones. CuFe2O4 nanoparticles were introduced as a recyclable, inexpensive and nontoxic catalyst in a four-component reaction of aromatic aldehydes, enolizable aromatic ketones, acetyl chloride
LaFeO3 perovskite nanoparticles as high-performance reusable catalyst for convenient synthesis of β-amido ketones under mild conditions
作者:Hossein Naeimi、Soraya Rahmatinejad
DOI:10.1007/s11164-019-03816-1
日期:2019.7
sustainability, low catalyst loading, easy workup and purification of products, excellent yield, and catalyst reusability of at least four times without any remarkable change in catalytic activity. Graphical abstract Perovskite-type LaFeO3 nanoparticles were prepared by a citric acid-based sol–gel route and successfully used as a heterogeneous and reusable nanocatalyst for convenientsynthesis of β-amido ketones
Nano magnetite supported phthalocyanine complexes of Cu(II) and Fe(II) as new heterogeneous effective catalysts for synthesis of β-amido ketones
作者:Hossein Naeimi、Soraya Rahmatinejad
DOI:10.1080/00958972.2018.1542493
日期:2018.12.17
Abstract In this study, a novel, heterogeneous and reusable catalyst prepared by the coordinative anchoring of metal(II) phthalocyanine complexes (M: Fe, Cu) on the guanidine-functionalized magnetic nanoparticles was reported. The synthesized catalysts were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), vibrating sample magnetometer (VSM), thermal gravimetric analysis
An iodine-mediated oxidative dehydrogenation of β-acylamino ketones has been developed for the synthesis of β-ketoenamides in moderate to good yields. Only Z-isomers are accessed due to the intramolecular H-bonding interaction in the HI-elimination step.
已开发出一种碘介导的 β-酰氨基酮氧化脱氢,用于以中等至良好的产率合成 β-酮烯酰胺。由于 HI 消除步骤中的分子内 H 键相互作用,只能访问 Z 异构体。