The procedure consists of a sequence of some reactions including an arylation/decarboxylation cascade and proceeds well in aqueous media to afford biologically interesting flavones and 3-arylcoumarins. This method exhibited excellent selectivity and functional group tolerance under mild conditions. The reaction also showed perfect efficacy for the preparation of styryl coumarins.
使用K 2 S 2 O 8,实现了色农酮与芳基硼酸的高度区域选择性和无过渡金属的一锅芳基化反应。该程序由一系列反应组成,包括芳基化/脱羧级联,并在水性介质中进行得很好,从而提供了生物学上令人感兴趣的黄酮和3-芳基香豆素。该方法在温和条件下显示出极好的选择性和官能团耐受性。该反应还显示出制备苯乙烯基香豆素的完美功效。
Synthesis of Flavones through NaI‐Mediated Electrochemical Cyclization of Chalcones
In this work, we demonstrated a novel electrochemical oxidative cyclization for synthesis of flavone from 2’-hydroxychalcone using an inexpensive using low toxic NaI as mediator/electrolyte without external additives in EtOH/water solvent. The key features of this reaction include its broad substrate scope, scalability, ability to operate with benign solvent at room temperature, and no requirement
在这项工作中,我们展示了一种新型电化学氧化环化方法,用于从 2'-羟基查耳酮合成黄酮,使用廉价的低毒 NaI 作为介体/电解质,无需外部添加剂,在乙醇/水溶剂中。该反应的主要特点包括底物范围广泛、可扩展性、能够在室温下使用良性溶剂进行操作,并且不需要强氧化剂和外部添加剂。
A novel one pot route to flavones under dual catalysis, an organo- and a Lewis acid catalyst
作者:Gourhari Maiti、Rajiv Karmakar、Rudraksha N. Bhattacharya、Utpal Kayal
DOI:10.1016/j.tetlet.2011.08.078
日期:2011.10
Substituted phenylacetylenes react with various o-hydroxy aromatic aldehydes under dual catalysis of piperidine and FeCl3 in refluxing toluene to yield flavones in good to excellent yield. Atmospheric oxygen acts as stoichiometric oxidant in the process. Some of these compounds had been recently reported to show fair insecticidal activity against Spodoptera frugiperda. (C) 2011 Elsevier Ltd. All rights reserved.
MAZUMDAR, A. K. D.;SAHA, G. C.;SINHA, T. K.;BANERJI, K. D., J. INDIAN CHEM. SOC., 1985, 61, N 11, 996-997
作者:MAZUMDAR, A. K. D.、SAHA, G. C.、SINHA, T. K.、BANERJI, K. D.
DOI:——
日期:——
Mazumdar, A. K. D.; Saha, G. C.; Sinha, T. K., Journal of the Indian Chemical Society, 1984, vol. 61, # 11-12, p. 996 - 997
作者:Mazumdar, A. K. D.、Saha, G. C.、Sinha, T. K.、Banerji, K. D.