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
Extended Aromatic and Heteroaromatic Ring Systems in the Chalcone–Flavanone Molecular Switch Scaffold
作者:Brian M. Muller、Theodore J. Litberg、Reid A. Yocum、Chanté A. Pniewski、Marc J. Adler
DOI:10.1021/acs.joc.6b00986
日期:2016.7.1
substitutions alter the pH range in which rapid interconversion occurs. Herein, more impactful structural modifications were performed via alteration of the characteristic phenyl rings to alternative aromaticsystems. It was determined that the scaffold was still viable after these changes and that the range of accessible midpoint pH values was markedly increased. To further explore the switch’s scope, scaffolds
Iodine catalyzed one-pot synthesis of flavanone and tetrahydropyrimidine derivatives via Mannich type reaction
作者:Veerababurao Kavala、Chunchi Lin、Chun-Wei Kuo、Hulin Fang、Ching-Fa Yao
DOI:10.1016/j.tet.2011.11.022
日期:2012.1
A variety of functionalized flavanone derivatives and tetrahydropyrimidine derivatives were achieved under remarkably mild conditions. The combination of good to excellent yields, a simple work-up, and the high compatibility of functional groups makes this an attractive synthetic approach to access flavanone and tetrahydropyrimidine derivatives.
Synthesis and antiproliferative activity of 6-naphthylpterocarpans
作者:Ádám Szappanos、Attila Mándi、Katalin Gulácsi、Erika Lisztes、Balázs István Tóth、Tamás Bíró、Sándor Antus、Tibor Kurtán
DOI:10.1039/d0ob00110d
日期:——
The Heck-oxyarylation of 2H-chromenes afforded (6S*,6aR*,11aR*)-6-naphthylpterocarpans with potent antiproliferative activity. Absolute configurations and conformations of the separated enantiomers were determined by TDDFT-ECD calculations.