A Convenient, Eco-friendly, and Efficient Method for Synthesis of 3,3'-Arylmethylene-bis-4-hydroxycoumarins "On-water"
作者:Arpita Das Gupta、Swati Samanta、Rina Mondal、Asok K. Mallik
DOI:10.5012/bkcs.2012.33.12.4239
日期:2012.12.20
various aldehydes (aromatic, heterocyclic, and α,β-unsaturated) 2 using different catalysts and media. Some of these methods require long reaction time, use of expensive catalysts and organic solvents and tedious work up. In four recent papers, the said condensation has been reported to be performed in water by employing molecular iodine, ruthenium(III) chloride hydrate or surfactants like TBAB or DDS
The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs): an efficient, green and recyclable nanocatalyst for the synthesis of biscoumarin derivatives under solvent-free conditions
The magnetic nanostructured natural hydroxyapatite (HAP/Fe3O4 NPs) as a novel magnetic nanocatalyst was synthesized and fully characterized. The excellent catalytic activity of HAP/Fe3O4 NPs was investigated in the synthesis of biscoumarin derivatives under mild, green and solvent-freeconditions. A series of aromatic (bearing different functional groups), heteroaromatic and aliphatic aldehydes have
摘要合成并充分表征了 磁性纳米结构天然羟基磷灰石(HAP / Fe 3 O 4 NPs)。HAP / Fe 3 O 4的优异催化活性在温和,绿色和无溶剂条件下合成双香豆素衍生物中研究了NP。一系列芳香族(具有不同的官能团),杂芳香族和脂肪族醛已被转化为双香豆素,具有良好的分离产率。本方法与绿色化学原理非常吻合的显着优点是:催化剂便宜,无毒,易于处理且可重复使用多达六次循环,纳米结构催化剂的磁分离,后处理简单,反应时间短,产品的高收率和使用无溶剂条件。 图形概要
Bis [hydrazinium (1+)] hexafluoridosilicate:(N2H5)2SiF6 novel hybrid crystal as an efficient, reusable and environmentally friendly heterogeneous catalyst for Knoevenagel condensation and synthesis of biscoumarin derivatives
作者:Fatima El hajri、Zakaria Benzekri、Sarra Sibous、Ali Ouasri、Said Boukhris、Amina Hassikou、Ali Rhandour、Abdelaziz Souizi
DOI:10.1016/j.molstruc.2021.129890
日期:2021.4
A simple, effective, green and non-toxic protocol was used for the Knoevenagelcondensation and the biscoumarin derivatives synthesis. It have demonstrated that the use of a new hybrid crystal as a heterogeneouscatalyst makes it possible to obtain several advantages such as: a short reaction time and exceptional catalytic activity. Furthermore, (N2H5)2SiF6 was examined for five successive cycles without
一种简单,有效,绿色且无毒的方案用于诺文雅格尔缩合反应和双香豆素衍生物的合成。已经证明,使用新的杂化晶体作为非均相催化剂能够获得一些优点,例如:反应时间短和优异的催化活性。此外,对(N 2 H 5)2 SiF 6进行了五个连续循环的检查,没有明显的催化活性损失。
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
Efficient synthesis of bis(indolyl)methanes, bispyrazoles and biscoumarins using 4-sulfophthalic acid
作者:Hoda Banari、Hamzeh Kiyani、Alireza Pourali
DOI:10.1007/s11164-016-2720-7
日期:2017.3
H2O has been effectively catalyzed the synthesis of a series of biologically relevant bis(indolyl)methanes by the electrophilic substitution of indole derivatives on aldehyde compounds and 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1 H -pyrazol-5-ol)s by condensing 5-methyl-2-phenyl-2,4-dihydro-3 H -pyrazol-3-one with various aldehydes under aqua conditions at roomtemperature. 3,3′-(Arylmethylene)-