摘要 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H -chromenes和2-amino-4-(pyrazol-在温和的条件下,在较短的反应时间内就可以以良好的产率(4-97%)制备4-yl)-4 H-苯甲基。所有产品均通过简单的结晶纯化。催化剂可以循环至少五次。 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H
Ascorbic acid: an efficient organocatalyst for environmentally benign synthesis of indole-substituted 4H‑chromenes
作者:Debjit Das
DOI:10.1007/s00706-021-02824-5
日期:2021.8
An expedient, straightforward, and efficient one-potthree-componentsynthesis of biologically relevant indole-substituted 4H-chromenes has been developed by the reaction of various indoles, malononitrile, and salicylaldehydes using a catalytic amount of ascorbic acid in aqueous ethanol at room temperature. The significant features of the developed protocol are the clean reaction profile, operational
An eco-friendly synthesis of 2-aminochromenes and indolyl chromenes catalyzed by InCl3 in aqueous media
作者:Gnanamani Shanthi、Paramasivan T. Perumal
DOI:10.1016/j.tetlet.2007.07.102
日期:2007.9
A simple and convenient method for the synthesis of new 2-aminochromenes and indolyl chromenes via an indium trichloride catalyzed, three-component reaction in aqueousmedia is described.
An Efficient and Ecofriendly Three-Component Reaction for the Rapid Synthesis of 2-Amino-4H-chromenes Catalyzed by a DABCO-Based Ionic Liquid
作者:Da-Zhen Xu、Cheng-Bin Li、Yu-Wei Li
DOI:10.1055/s-0037-1610123
日期:2018.9
catalyst could be recycled for at least five times. An efficient, economical, and green strategy for the construction of biologically relevant 2-amino-4H-chromene scaffolds via a tandem Knoevenagel–Pinner cyclization–Michael reaction has been successfully developed. In the presence of DABCO-based ionicliquids, two different 2-amino-4H-chromene derivatives, 2-amino-4-(indol-3-yl)-4H-chromenes and 2-amino
摘要 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H -chromenes和2-amino-4-(pyrazol-在温和的条件下,在较短的反应时间内就可以以良好的产率(4-97%)制备4-yl)-4 H-苯甲基。所有产品均通过简单的结晶纯化。催化剂可以循环至少五次。 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H
Experimental and theoretical studies on SPION@glutathione catalyzed synthesis of indolyl chromene, indolo xanthene, and pyrimido[4,5-<i>b</i>]quinoline
characterized by the following analytical techniques: TEM, scanning electron microscope, EDS, powder X-ray diffraction, vibrating sample magnetometry, FTIR, TGA, DTA. Its catalytic prowess in the synthesis of several indolyl chromenes, pyrrolyl chromenes, and indoloxanthenes were meticulously investigated. The synthetic protocol was found to be efficient, economical, and environment benign. Quantum
摘要 通过实验和计算研究了谷胱甘肽作为碳-氧环环化催化剂的潜力。谷胱甘肽分子被固定在超顺磁性氧化铁纳米颗粒上,以提高催化剂的效率并增强磁辅助可回收性。还利用超声波使纳米颗粒在水性介质中彻底分散,从而增强催化剂与反应物之间的接触。这种纳米有机催化剂是通过以下分析技术合成和表征的:TEM、扫描电子显微镜、EDS、粉末 X 射线衍射、振动样品磁强计、FTIR、TGA、DTA。仔细研究了其在几种吲哚基色烯、吡咯基色烯和吲哚茚的合成中的催化能力。该合成方案被发现高效、经济且环境友好。使用高斯程序即进行量子化学研究以研究催化剂对 C-O 环环化的影响。B3LYP。图形概要
Functionalized superparamagnetic Fe<sub>3</sub>O<sub>4</sub> as an efficient quasi-homogeneous catalyst for multi-component reactions
作者:U. Chinna Rajesh、Divya Divya、Diwan S. Rawat
DOI:10.1039/c4ra06803c
日期:——
Tetrabutylammonium valinate [NBu4][Val] ionic liquid functionalized Fe3O4 NPs (VSF) was used as an efficient “quasi-homogeneous” catalyst for multi-component synthesis of 1,4-dihydropyridines and 2-amino-4-(indol-3-yl)-4H-chromenes at room temperature.