heterogeneous catalyst for the synthesis of naphthopyrans by one-pot three-component reaction of naphthols, aldehydes, and malononitrile in EtOH/H2O (1:1) solvent medium. A comparative study of Ni–Al2O3 with neutral Al2O3 revealed that reactions with the former afforded better product yields, indicating higher catalytic efficacy. Ni–Al2O3 due to its lowcost, good activity, ease of handling, and easy recovery
摘要 Ni–Al 2 O 3是一种高效且可重复使用的非均相催化剂,用于在EtOH / H 2 O(1:1)溶剂介质中通过萘酚,醛和丙二腈的一锅三组分反应合成萘并吡喃。Ni-Al 2 O 3与中性Al 2 O 3的比较研究表明,与前者的反应提供了更高的产物收率,表明具有更高的催化效率。Ni-Al 2 O 3的价格低,活性好,易于处理,易于回收,产率高,纯化方法简单等特点使该方法具有很高的适用性。 图形概要
Synthesis of a novel poly(ethylene glycol) grafted triethylamine functionalized dicationic ionic liquid and its application in one-pot synthesis of 2-amino-2-chromene derivatives in water
作者:Yinglei Wang、Chun Yue、Xia Li、Jun Luo
DOI:10.1016/j.crci.2016.03.002
日期:2016.8
Abstract A novel poly(ethylene glycol) grafted triethylamine functionalizeddicationicionicliquid has been prepared and characterized. It was successfully used as an efficient catalyst for the three-component synthesis of 2-amino-2-chromene derivatives in water. The simple workup, mild reaction conditions, wide substrate flexibility, excellent yields, and environmental friendliness are notable advantages
DABCO‐Catalyzed Efficient Synthesis of Naphthopyran Derivatives via One‐Pot Three‐Component Condensation Reaction at Room Temperature
作者:Saeed Balalaie、Sorour Ramezanpour、Morteza Bararjanian、Jürgen H. Gross
DOI:10.1080/00397910701862865
日期:2008.3.1
(DABCO) has been used as a mild and efficient catalyst for synthesis of 2‐amino‐3‐cyano naphthopyran derivatives via a one‐potthree‐componentreaction of aromatic aldehydes, naphthols, and malononitrile at room temperature. The short reaction times, easy workup, good to excellent yields, and mild reaction conditions make this domino Knoevenagel–Michael reaction both practical and attractive.
Studies on the Synthesis of Substituted 2-amino-4<i>H</i>-benzo[<i>h</i>]chromene and 3-amino-1<i>H</i>-benzo[<i>f</i>]chromene Derivatives Using Base Supported Ionic Liquid Like-phase (SILLP) as an Efficient Green Catalyst
The synthesis of several substituted 2-amino-4H-benzo[h]chromene and 3-amino-1H-benzo[f]chromenederivatives was carried out using a one-pot three-component reaction of an arylaldehyde, malononitrile and a naphthol in H2O and in the presence of recyclable base supported ionicliquid like-phase as an efficient green catalyst.
Biocompatible Ionic Liquid Promote One-Pot Synthesis of 2-Amino-4H-Chromenes Under Ambient Conditions
作者:Anlian Zhu、Qixing Li、Wanlu Feng、Dongshuang Fan、Lingjun Li
DOI:10.1007/s10562-020-03332-7
日期:2021.3
The synthesis of 2-amino-4H-chromenes through one-pot multicomponent reactions has received great attention due to the high atom efficiency and the broad bioactivities of the products. Here, the catalytic performances of a series of functional ionic liquids towards this type of reaction were investigated and the results showed that the ionic liquid, choline acetate ([Choline][Ac]), could efficiently