Palladium-Catalyzed Asymmetric Conjugate Addition of Arylboronic Acids to Heterocyclic Acceptors
作者:Jeffrey C. Holder、Alexander N. Marziale、Michele Gatti、Bin Mao、Brian M. Stoltz
DOI:10.1002/chem.201203643
日期:2013.1.2
Flava Flavanone: Asymmetricconjugateadditions to chromones and 4‐quinolones are reported utilizing a single catalyst system formed in situ from Pd(OCOCF3)2 and (S)‐tBuPyOX. Notably, these reactions are performed in wet solvent under ambient atmosphere, and employ readily available arylboronicacids as the nucleophile, thus providing ready access to these asymmetric heterocycles (see scheme).
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。
An efficient synthesis of flavanones and their docking studies with aldose reductase
作者:D. D. Kondhare、G. Gyananath、Yasinalli Tamboli、Santosh S. Kumbhar、Prafulla B. Choudhari、Manish S. Bhatia、P. K. Zubaidha
DOI:10.1007/s00044-017-1813-1
日期:2017.5
supported by the docking studies. Among the tested derivatives, 2, 3, 4-methoxy derivative 19 (IC50 5.88 ± 0.03 µM) exhibited the highest inhibitory activity whereas 2-methoxy derivative 12 showed the lowest, and the remaining compounds exhibited moderate activity with IC50 in the range of 6.09–7.89 µM. The spatial configuration of the most active derivative 19 was compared with pharmacophore requirements
flavanones, which included polycyclic aromatic and heterocyclic rings, were readily synthesized via oxa-Michael addition from the corresponding hydroxychalcones with a catalytic amount of aqueous cesium fluoride solution under mild conditions. This method could be applied to the scalable synthesis of eriodictyol as a known potent inhibitor of the SARS-CoV-2 spike protein.
Guanidino-Graphene Catalysed Synthesis of Flavones via Aldol-Michael-Oxidation
作者:Sweta Mishra、Smriti Arora、Ritika Nagpal、Shive Murat Singh Chauhan
DOI:10.1166/jnn.2017.12644
日期:2017.4.1
Guanidino-graphene has been synthesized by the reaction of bromoamine with reduced graphene oxide and characterized by FT-IR, Raman, TGA, powder XRD, TEM, SEM, and zeta potential. It is a cheap, heterogeneous and environmentally benign solid base catalyst used for cascade Aldol-Michael-oxidation in the synthesis of chalcone, flavonoids.