Microwave-assisted synthesis and antimicrobial activities of flavonoid derivatives
作者:Sherif B. Abdel Ghani、Louise Weaver、Zidan H. Zidan、Hussein M. Ali、C. William Keevil、Richard C.D. Brown
DOI:10.1016/j.bmcl.2007.11.081
日期:2008.1
Eleven flavonoid derivatives were synthesised using a modified Baker-Venkataraman rearrangement, and subsequent microwave-assisted closure of the heterocyclic ring. All of the synthetic compounds displayed antifungal activity against Aspergillus niger and Fusarium oxysporium, and two of the synthetic flavonoid analogues exhibited significant activity against methicillin-resistant Staphylococcus aureus
A visible-light-induced photocatalytic strategy for the synthesis of flavonoids has been developed through the deoxygenative/cyclization reaction of salicylic acid derivatives with aryl acetylene using diphenyl sulfide as an O-transfer reagent. Based on the controlled experiments, the mechanism of visible-light-induced free radical coupling cyclization was proposed. The protocol obtained 51 flavonoids
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。