The present invention relates to compounds of the general formula (1) wherein the variables are defined as given in the description and claims. The invention further relates to uses of and to, processes and intermediates related to compounds of the general formula (I), wherein Q is wherein the substituents of I, Ia and Ib are as defined in description and claims.
Acid-Catalyzed Rearrangement of 3-Cyanoquinoxalin-2(1<i>H</i>)-ones When Exposed to 1,2-Diaminobenzenes: Synthesis of 2,2′-Bibenzimidazoles
作者:Vakhid A. Mamedov、Nataliya A. Zhukova、Milyausha S. Kadyrova、Victor V. Syakaev、Tat’yana N. Beschastnova、Daina N. Buzyurova、Il’dar Kh. Rizvanov、Shamil K. Latypov、Oleg G. Sinyashin
DOI:10.1021/acs.joc.9b01840
日期:2019.11.1
A novel and efficient protocol for the synthesis of diversely substituted 2,2'-bibenzimidazoles from the reaction of 3-cyanoquinoxalin-2(1H)-ones with 1,2-diaminobenzenes has been developed, which proceeds through sequential nucleophilic addition and electrophilic substitution followed by a Mamedov rearrangement. The synthetic utility of this strategy was illustrated by the concise, one-pot synthesis
Electrochemical Oxidative C−H Cyanation of Quinoxalin‐2(1
<i>H</i>
)‐ones with TMSCN
作者:Yanling Zhan、Yifan Li、Jinwen Tong、Ping Liu、Peipei Sun
DOI:10.1002/ejoc.202100348
日期:2021.4.22
Regioselective electrochemicalC−Hcyanation of quinoxalin‐2(1H)‐ones with a nucleophilic cyano source TMSCN was achieved using an undivided electrolytic cell. Transition metal‐ and organic hydroperoxides‐free conditions were the remarkable features of this protocol.