摘要 一种构建吡喃并[3,2- c ]色烯衍生物的简单、高效和环保的方法,涉及3-羟基香豆素、各种苯甲醛和丙二腈的一锅多组分缩合,由氯化胆碱-尿素催化开发了硫脲深共熔溶剂(DES)。该方法具有反应时间短、条件温和、催化剂可回收和生物降解、操作简单、目标产物收率高等优点。所有合成化合物的结构均通过光谱数据确认。
Synthesis of a SO3H-bearing carbonaceous solid catalyst, PEG–SAC: application for the easy access to a diversified library of pyran derivatives
作者:Sanjay Paul、Sirshendu Ghosh、Pranabes Bhattacharyya、Asish R. Das
DOI:10.1039/c3ra42352b
日期:——
A SO3H-bearing carbonaceous solid catalyst (PEG–SAC) has been synthesized through sulfonation followed by a hydrothermal carbonization method from renewable resources like polyethylene glycol. The biodegradable catalyst was characterized by XRD, TEM, FT-IR and EDX. The surface area and pore diameter of the catalyst were determined from a nitrogen adsorption–desorption isotherm experiment. A highly
New Crown Ether-Based Ionic Liquids as a Green and Versatile Organocatalyst for Three-Component Synthesis of 1,5-Dihydropyrano[2,3- c]chromene Derivatives
3-c]chromene derivatives has been reported by three-component reaction of aromatic aldehydes, malononitrile, and 3-hydroxycoumarin in the presence of a series of novel crown ether-based ionic liquids (CE-based ILs) in H2O/EtOH (1:1), under the reflux conditions. The novel CE-based ILs have been synthesized by 18-crown-6 or dibenzo 18-crown-6 chelated with sodium benzenesulfinate derivatives and used as
One-pot synthesis of dihydropyrano[2,3-c]chromenes via a three component coupling of aromatic aldehydes, malononitrile, and 3-hydroxycoumarin catalyzed by nano-structured ZnO in water: a green protocol
作者:Sanjay Paul、Pranabes Bhattacharyya、Asish R. Das
DOI:10.1016/j.tetlet.2011.06.101
日期:2011.9
An efficient and green protocol for the synthesis of dihydropyrano[2,3-c]chromene derivatives by one-pot, three component coupling reaction of aromatic aldehyde, malononitrile, and 3-hydroxycoumarin has been developed using nano-structured ZnO as the catalyst. The formation of self-assembled organic nanofiber arising from low-molecular-weight molecules has also been performed. The optical properties of the nano-structured organic molecules were studied. (C) 2011 Elsevier Ltd. All rights reserved.
Patra, Amarendra; Mahapatra, Tanusri, Journal of the Indian Chemical Society, 2012, vol. 89, # 7, p. 925 - 932
作者:Patra, Amarendra、Mahapatra, Tanusri
DOI:——
日期:——
Rapid and Efficient One-Pot Multicomponent Synthesis of Pyrano[3,2-c]chromene Derivatives, Catalyzed by a Deep Eutectic Solvent
作者:S. Tasqeeruddin、Y. I. Asiri、S. Shaheen
DOI:10.1134/s1070428021080121
日期:2021.8
construction of pyrano[3,2-c]chromenederivatives, involving a one-pot multicomponent condensation of 3-hydroxycoumarin, various benzaldehydes, and malononitrile, catalyzed by a choline chloride–urea–thiourea deepeutecticsolvent (DES) was developed. The method offers several advantages, including short reaction times, mild conditions, a recyclable and biodegradable catalyst, a simple operating procedure
摘要 一种构建吡喃并[3,2- c ]色烯衍生物的简单、高效和环保的方法,涉及3-羟基香豆素、各种苯甲醛和丙二腈的一锅多组分缩合,由氯化胆碱-尿素催化开发了硫脲深共熔溶剂(DES)。该方法具有反应时间短、条件温和、催化剂可回收和生物降解、操作简单、目标产物收率高等优点。所有合成化合物的结构均通过光谱数据确认。