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
[EN] FLAVONE COMPOUNDS FOR THE TREATMENT AND PROPHYLAXIS OF HEPATITIS B VIRUS DISEASE<br/>[FR] COMPOSÉS DE FLAVONE POUR LE TRAITEMENT ET LA PRÉVENTION D'UNE MALADIE CAUSÉE PAR LE VIRUS DE L'HÉPATITE B
申请人:HOFFMANN LA ROCHE
公开号:WO2020053249A1
公开(公告)日:2020-03-19
The present invention provides flavone derivatives having the general formula (I) which are useful for the treatment of Hepatitis B Virus infection (HBV). The compounds act as cccDNA (covalently closed circular DMA) inhibitors.
Sodium Selenite-dimethylsulfoxide: A Highly Efficient Reagent for Dehydrogenation
作者:Mandeep Lamba、Jagdish Kumar Makrandi
DOI:10.3184/030823408x313591
日期:2008.4
Sodium selenite in dimethylsulfoxide is a highlyefficientreagent for dehydrogenation reactions and can be used under both thermal as well as microwave irradiation conditions. Using this reagent benzoins have been dehydrogenated to benzils, flavanones to flavones and 2′-hydroxy chalcones have been converted into flavones by cyclodehydrogenation.
Solution Phase Synthesis of a Combinatorial Library of Chalcones and Flavones as Potent Cathepsin V Inhibitors
作者:Joel Alvim、Richele P. Severino、Emerson F. Marques、Ariane M. Martinelli、Paulo C. Vieira、João B. Fernandes、M. Fatima das G. F. da Silva、Arlene G. Corrêa
DOI:10.1021/cc100076k
日期:2010.9.13
Cathepsin V is a papain-likecysteineprotease. It is involved in the control of human T cells (responsible for cell immunity), and presents the largest elastolytic activity among the proteolytic enzymes. Therefore, cathepsin V is a potential molecular target for the treatment of atherosclerosis. In the present work, natural flavonoids were screened against cathepsin V, and two flavones were identified
Regioselective synthesis of flavone derivatives via DMAP-catalyzed cyclization of o-alkynoylphenols
作者:Masahito Yoshida、Yuta Fujino、Koya Saito、Takayuki Doi
DOI:10.1016/j.tet.2011.09.063
日期:2011.12
A catalytic amount of DMAP promoted cyclization of o-alkynoylphenols via a 6-endo cyclization mode leading to flavone derivatives in high yields without forming 5-exo cyclizedauronederivatives. Utilizing this method, methoxy substituted flavone and alkyl substituted γ-benzopyranone derivatives were synthesized.