Palladium-Catalyzed Carbonylation Reaction of Aryl Bromides with 2-Hydroxyacetophenones to Form Flavones
作者:Xiao-Feng Wu、Helfried Neumann、Matthias Beller
DOI:10.1002/chem.201202141
日期:2012.10.1
Flavone of the month: A general and efficient method for the palladium‐catalyzed carbonylativesynthesis of flavones has been developed (see scheme). Starting fromarylbromides and 2‐hydroxyacetophenones, the corresponding flavones have been isolated in good yields.
Identification and structure activity relationship of novel flavone derivatives that inhibit the production of nitric oxide and PGE 2 in LPS-induced RAW 264.7 cells
作者:Ji-Young An、Hwi-Ho Lee、Ji-Sun Shin、Hyung-Seok Yoo、Jong Seon Park、Seung Hwan Son、Sang Won Kim、Jihyun Yu、Jun Lee、Kyung-Tae Lee、Nam-Jung Kim
DOI:10.1016/j.bmcl.2017.03.057
日期:2017.6
In an effort to identify novel anti-inflammatory compounds, a series of flavone derivatives were synthesized and biologically evaluated for their inhibitory effects on the production of nitric oxide (NO) and prostaglandinE2 (PGE2), representative pro-inflammatory mediators, in LPS-induced RAW 264.7 cells. Their structure-activity relationship was also investigated. In particular, we found that compound
One-Pot Allan-Robinson/Friedländer Route to Chromen-/Quinolin-4-ones through the Domino Acetylative Cyclisation of 2-Hydroxy-/2-Aminobenzaldehydes
作者:Vijai K. Rai、Fooleswar Verma、Ganeshwar P. Sahu、Manorama Singh、Ankita Rai
DOI:10.1002/ejoc.201701435
日期:2018.1.31
A domino reaction between 2‐hydroxy‐/2‐aminobenzaldehydes and α‐haloketones gives chromen‐4‐ones and quinolin‐4‐ones in good to excellent yields. This method represents a new extension of the Allan–Robinson and Friedländer reactions, and uses N‐heterocyclic‐carbene catalysis. This approach has the advantages of operational simplicity, ambient reaction conditions, and no by‐product formation.
Transcription factor modulating compounds and methods of use thereof
申请人:Alekshun N. Michael
公开号:US20060160799A1
公开(公告)日:2006-07-20
Substituted benzoimidazole compounds useful as anti-infectives that decrease resistance, virulence, or growth of microbes are provided. Methods of making and using substituted benzoimidazole compounds, as well as pharmaceutical preparations thereof, in, e.g., reducing antibiotic resistance and inhibiting biofilms.
Ionic liquid mediated Cu-catalyzed cascade oxa-Michael-oxidation: efficient synthesis of flavones under mild reaction conditions
作者:Zhiyun Du、Huifen Ng、Kun Zhang、Huaqiang Zeng、Jian Wang
DOI:10.1039/c1ob06209c
日期:——
Flavonoids are a class of natural products, found in a wide range of vascular plants and dietary components. Their low toxicity and extensive biological activities, including anti-cancer and anti-bacterial, have made them attractive candidates to serve as therapeutic agents for many diseases. Herein, we disclose a highly efficient synthetic method of CuI-catalyzed cascade oxa-Michael-oxidation, using chalcones as substrates, mediated by the ionic liquid [bmim][NTf2] at a low temperature. This efficient synthetic method has demonstrated high synthetic utility and can afford flavones in good to high yields (up to 98%).