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.
Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions
Ynones are privileged buildingblocks in various organic syntheses of heterocyclicderivatives due to their multifunctional nature, and flavones are an important class of natural products with a wide range of biological activities. We describe the catalytic double decarboxylative alkynylation of arylpropiolic acids with α‐keto acids. With Ag(I)/persulfate as the catalysis system, the valuable ynones
Divergent synthesis of flavones and flavanones from 2′-hydroxydihydrochalcones <i>via</i> palladium(<scp>ii</scp>)-catalyzed oxidative cyclization
作者:Seung Hwan Son、Yang Yil Cho、Hyung-Seok Yoo、Soo Jin Lee、Young Min Kim、Hyu Jeong Jang、Dong Hwan Kim、Jeong-Won Shin、Nam-Jung Kim
DOI:10.1039/d1ra01672e
日期:——
Divergent and versatile synthetic routes to flavones and flavanones via efficient Pd(II) catalysis are disclosed. These Pd(II) catalyses expediently provide a variety of flavones and flavanones from 2′-hydroxydihydrochalcones as common intermediates, depending on oxidants and additives, via discriminate oxidative cyclization sequences involving dehydrogenation, respectively, in a highly atom-economic
公开了通过有效的 Pd( II ) 催化合成黄酮和黄烷酮的不同且通用的合成路线。根据氧化剂和添加剂,这些 Pd( II ) 催化剂分别以高度原子经济的方式通过涉及脱氢的区分氧化环化序列,方便地从 2'-羟基二氢查耳酮中提供各种黄酮和黄烷酮作为常见的中间体。
Water-mediated phosphorylative cyclodehydrogenation: An efficient preparation of flavones and flavanones
作者:Manorama Vimal、Uma Pathak、Anand Kumar Halve
DOI:10.1080/00397911.2019.1643484
日期:——
for the conversion of 2′-hydroxychalcones to flavanones and flavones has been developed. The reagent efficiently promoted one-pot conversion of 2′-hydroxychalcones to flavones through flavanones involving cyclization and oxidative dehydrogenation. By changing the stoichiometery of the reagents, the reaction can be tuned to generate either flavanone or flavone. The developed protocol was found to be applicable
Synthesis and Antiviral Activity of 2-aryl-4H-chromen-4-one Derivatives Against Chikungunya Virus
作者:Vishnu N. Badavath、Surender S. Jadav、Boris Pastorino、Xavier de Lamballerie、Barij N. Sinha、Venkatesan Jayaprakash
DOI:10.2174/1570180813666160711163349
日期:2016.10.31
A series of nineteen 2-aryl-4H-chromen-4-one derivatives 2a-2s were synthesized and
evaluated for their antiviral activity against Chikungunya virus (LR2006_OPY1) in Vero cell culture
by CPE reduction assay. Three compounds 2a, 2b and 2g, were found to be active at concentration of
(IC50) 0.44 M, 0.45 M and 2.02 M, respectively. Compounds having heterocyclic ring 2a and 2b
at the 2nd position of the chromenone were found to be potent inhibitor of ChikV. Cytotoxicity studies
were performed using Vero cell culture, compounds 2a and 2b exhibited SI of 100. Molecular
docking simulation has been carried out to understand the possible mechanism of action.