P 4 VPy-CuO纳米颗粒作为新型固体催化剂,采用超声辐照法合成,并通过X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和傅立叶变换红外光谱(FT-IR)表征)光谱学。制备的催化剂用于绿色,简单,高效的双(吲哚基)甲烷和3,3'-(芳基亚甲基)双(4-羟基香豆素)的合成。该方法具有一些优点,例如反应时间短,环境友好的条件,易于后处理和优异的收率。该催化剂可以容易地分离和重复使用,而其活性没有任何明显的损失。
Facile and Straightforward Synthesis of Racemic Version of Substituted 3-[3-(2-Hydroxyphenyl)-3-oxo-1-arylpropyl]-4-hydroxycoumarins: Easy Access to a Series of Biorelevant Warfarin Analogues
The present communication deals with a straightforward, efficient, and green synthesis of a series of racemic version of 3-[3-(2-hydroxyphenyl)-3-oxo-1-arylpropyl]-4-hydroxycoumarins as biologically interesting warfarin analogues upon decarboxylative hydrolysis of bis-coumarin derivatives in aqueous potassium hydroxide solution. The salient features of this practical method are operational simplicity
A clean synthesis of bis(indolyl)methane and biscoumarin derivatives using P<sub>4</sub>VPy–CuO nanoparticles as a new, efficient and heterogeneous polymeric catalyst
the green, simple and highly efficient synthesis of bis(indolyl)methanes and 3,3′-(arylmethylene)bis(4-hydroxycoumarins). This methodology has some advantages such as short reaction times, environmentally friendly conditions, easy work-up, and excellent yields. This catalyst can be easily separated and re-used without any appreciable loss in its activity.
P 4 VPy-CuO纳米颗粒作为新型固体催化剂,采用超声辐照法合成,并通过X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和傅立叶变换红外光谱(FT-IR)表征)光谱学。制备的催化剂用于绿色,简单,高效的双(吲哚基)甲烷和3,3'-(芳基亚甲基)双(4-羟基香豆素)的合成。该方法具有一些优点,例如反应时间短,环境友好的条件,易于后处理和优异的收率。该催化剂可以容易地分离和重复使用,而其活性没有任何明显的损失。
Heterogeneous
<scp>
SO
<sub>3</sub>
H
</scp>
@
<scp>
Fe
<sub>3</sub>
O
<sub>4</sub>
</scp>
magnetic nanocatalyst as an efficient and reusable medium for the synthesis of 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives
作者:Xiaobo Wu、Wan‐Xi Peng
DOI:10.1002/jccs.202000087
日期:2020.11
This work aimed to synthesize a new heterogeneous catalyst (SO3H@Fe3O4 magnetic nanoparticles) and the study of its catalytic behavior in synthesizing 3,3′‐(arylmethylene)‐bis‐(4‐hydroxycoumarin), bis‐(indolyl)‐methane, and 1,8‐dioxo‐octahydroxanthene derivatives. The characterization of obtained material has been performed by means of Fourier‐transform infrared spectroscopy, thermogravimetric analysis
这项工作旨在合成一种新的非均相催化剂(SO 3 H @ Fe 3 O 4磁性纳米粒子),并研究其在合成3,3'-(芳基亚甲基)-双-(4-羟基香豆素),双-(吲哚基)-甲烷和1,8-二氧代-八氢氧杂蒽衍生物。通过傅立叶变换红外光谱,热重分析,X射线衍射,振动样品磁力计和透射电子显微镜对获得的材料进行表征。与以前的方法相比,这种新方法的主要特性是反应时间短,反应条件温和,通过永久磁场简单回收催化剂,具有出色的收率,并且催化剂可重复使用至少六次。
Sulfonated rice husk ash (RHA-SO3H) as a highly efficient and reusable catalyst for the synthesis of some bis-heterocyclic compounds
Sulfonated rice husk ash (RHA-SO3H), a newly reported solid acid catalyst, was efficiently used for the synthesis of 4,4′-(arylmethylene)-bis-(3-methyl-1-phenyl-1H-pyrazol-5-ols), 3,3′-(arylmethylene)-bis-(4-hydroxycoumarins) and bis(indolyl)methanes. The procedure gave the products in excellent yields within very short reaction times under mild and green conditions. Also this catalyst can be reused several times without appreciable loss of its catalytic activity.
Tetrabutylammonium bromide (TBAB): a neutral and efficient catalyst for the synthesis of biscoumarin and 3,4-dihydropyrano[c]chromene derivatives in water and solvent-free conditions
作者:Jitender M. Khurana、Sanjay Kumar
DOI:10.1016/j.tetlet.2009.04.125
日期:2009.7
A simple, efficient and ecofriendly procedure has been developed using tetrabutylammonium bromide as catalyst for the synthesis of biscoumarin and dihydropyrano[c]chromenederivatives in water and solvent-free neat conditions. The present methodology offers several advantages such as excellent yields, short reaction time and environmentally benign milder reaction conditions.
使用四丁基溴化铵作为催化剂,在水和无溶剂纯净条件下合成双香豆素和二氢吡喃并[ c ]色烯衍生物,已开发出一种简单,高效且环境友好的方法。本方法提供了许多优点,例如优异的产率,短的反应时间和对环境无害的温和的反应条件。