Synthesis of Natural and Biologically Active Quinoxaline Analogs
作者:Yu. A. Azev、O. S. Koptyaeva、A. N. Tsmokalyuk、T. A. Pospelova、N. A. Gerasimova、N. P. Evstigneeva、N. V. Zil’berberg、N. V. Kungurov、O. N. Chupakhin
DOI:10.1007/s10600-019-02728-1
日期:2019.5
Reactions of quinoxalines and quinoxalin-2-ones with C-nucleophiles under acid-catalysis conditions gave products from nucleophilic substitution of hydrogen. Substitution of F atoms in the aromatic core of quinoxalines was studied. Antibacterial and fungistatic activity of the synthesized compounds was studied.
喹喔啉和喹喔啉-2-酮与 C-亲核试剂在酸催化条件下反应得到氢的亲核取代产物。研究了喹喔啉芳香核中 F 原子的取代。研究了合成化合物的抗菌和抑菌活性。
<scp>One‐pot</scp>
homo‐ and
<scp>cross‐coupling</scp>
of diazanaphthalenes via
<scp>C‐H</scp>
substitution: Synthesis of Bis‐ and
<scp>Tris‐diazanaphthalenes</scp>
作者:Sefa Ucar、Arif Dastan
DOI:10.1002/jhet.4111
日期:2020.11
The transition metal‐free coupling reactions of unactivated diazanaphthalenes were studied using only lithium tetramethylpiperidine (LiTMP) reagent. Symmetrical and nonsymmetrical bis‐diazanaphthalenes were synthesized in moderate to high yield by homo‐ and cross‐coupling of related monomers. In addition, the single‐step synthesis of diquinoxalino [2,3‐a: 2', 3'c] phenazine and 2,2': 3', 2″ ‐ terquinoxaline
Electrochemical Arylation of Electron‐Deficient Arenes through Reductive Activation
作者:Pan Wang、Zhenlin Yang、Ziwei Wang、Chenyang Xu、Lei Huang、Shengchun Wang、Heng Zhang、Aiwen Lei
DOI:10.1002/anie.201909600
日期:2019.10.28
An electrochemical method has been developed to achieve arylation of electron-deficientarenes through reductive activation. Various electron-deficientarenes and aryldiazonium tetrafluoroborates are amenable to this transformation within the conditions of an undivided cell, providing the desired products in up to 92 % yield. Instead of preparing diazonium reagents, these reactions can begin from anilines
Highly Enantioselective Direct Synthesis of Endocyclic Vicinal Diamines through Chiral Ru(diamine)-Catalyzed Hydrogenation of 2,2′-Bisquinoline Derivatives
作者:Wenpeng Ma、Jianwei Zhang、Cong Xu、Fei Chen、Yan-Mei He、Qing-Hua Fan
DOI:10.1002/anie.201608181
日期:2016.10.4
An asymmetrichydrogenation of 2,2′‐bisquinoline and bisquinoxaline derivatives, catalyzed by chiral cationic ruthenium diamine complexes, was developed. A broad range of chiral endocyclic vicinal diamines were obtained in high yields with excellent diastereo‐ and enantioselectivity (up to 93:7 dl/meso and >99 % ee). These chiral diamines could be easily transformed into a new class of chiral N‐heterocyclic