120759-66-2Relevant academic research and scientific papers
CO2 as a C1 Source: B(C6F5)3-Catalyzed Cyclization of o-Phenylene-diamines To Construct Benzimidazoles in the Presence of Hydrosilane
Zhang, Zhenbei,Sun, Qiangsheng,Xia, Chungu,Sun, Wei
supporting information, p. 6316 - 6319 (2016/12/23)
The catalytic construction of benzimidazoles using CO2 as a carbon source represents a facile and sustainable approach to obtaining these valuable compounds. Herein, we describe the B(C6F5)3-catalyzed synthesis of benzimidazoles via cyclization of o-phenylenediamines with CO2 and PhSiH3. This metal-free catalytic route achieves the desired products in high yield under convenient reaction conditions and is applicable to a broad substrate scope. A plausible mechanism for the reaction involving a frustrated Lewis pair pathway is proposed based on spectroscopic characterization (e.g., 13C NMR) of the reaction intermediates.
THIONATION OF IMIDAZOPYRIDINES
Yutilov, Yu.M.,Svertilova, I.A.
, p. 653 - 658 (2007/10/02)
Direct thionation of imidazopyridines and imidazopyridines results in the formation of their 2-thioxo derivatives, usually in high yield.The thione structure of the imidazopyridines obtained has been confirmed from their IR spectra in the solid state and in solution.The general nature of the thionation of imidazole, benzimidazole, imidazopyridine, imidazopyridine, and purine has been noted as one of the distinctive chemical properties of compounds in this series of nitrogen heterocycles.
