So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Kim, Youngsuk; Byeon, Jung Eun; Jeong, Gu Yoon; Kim, Seoung Su; Song, Hayoung; Lee, Eunsung researched the compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene( cas:141556-42-5 ).Electric Literature of C21H24N2.They published the article 《1,2-dicarbonyl radicals with exceptional physiological and chemical stability》 about this compound( cas:141556-42-5 ) in ChemRxiv. Keywords: dicarbonyl radical physiol stability. We’ll tell you more about this compound (cas:141556-42-5).
Organic radicals have been of great academic interest due to their unique reactivity and potential applicability; however, lack of stability and solubility continues to limit their application, especially in physiol. conditions. For example, known aminoxyl radicals have half-life of a few minutes in physiol. conditions due to biol. redox active reagents, while shielding using polymeric or supramol. protecting groups increases their half-life up to several hours. Here the authors designed and synthesized a new small mol. organic radical based on 1,2-dicarbonyl scaffold with exceptional stability. The presented radicals showed superior stability over present organic radicals towards physiol. conditions (half-life of ~3000 h) and even resistant towards chem. reducing, oxidizing, acidic, basic conditions, and high temperature, without addnl. protection.
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Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles