Iron-catalyzed C–N bond formation via oxidative Csp3–H bond functionalization adjacent to nitrogen in amides and anilines: Synthesis of N-alkyl and N-benzyl azoles
作者:G. Saidulu、R. Arun Kumar、K. Rajender Reddy
DOI:10.1016/j.tetlet.2015.05.048
日期:2015.7
Iron catalyzed oxidative protocol was developed to couple azoles with amides to generate N-alkylazole derivatives in moderate to excellent yields using tertiarybutyl hydroperoxide as an oxidant under mild reaction conditions. Furthermore, this protocol explored to couple azoles with N-alkylanilines, unexpectedly N-benzyl azoles were obtained as major products under these oxidative conditions.
particle size ranging from 10.9 to 26.5 nm embedded in turbostratic graphitic carbon matrix have been prepared by pyrolysis at 900 °C under inert atmosphere of chitosan powders containing Fe2+ and Co2+ ions in various proportions. The resulting Fe/Co NP@C samples have been evaluated as heterogeneous catalysts for the oxidative C−N coupling of amides and aromatic N−H compounds. It was observed that sequential
Iron-Catalyzed N-Alkylation of Azoles via Cleavage of an sp<sup>3</sup> C–H Bond Adjacent to a Nitrogen Atom
作者:Qinqin Xia、Wanzhi Chen
DOI:10.1021/jo301568e
日期:2012.10.19
Iron-catalyzed direct C-N bond formation between azoles and amides is described. The oxidative coupling reactions of sp(3) C-H bonds adjacent to a nitrogen atom in amides and sulfonamides with the N-H bond in azoles proceeded smoothly in the presence of FeCl2 and di-tert-butyl peroxide (DTBP).
A Metal-Free Cross-Dehydrogenative Coupling Reaction of Amides to Access N-Alkylazoles
作者:Shengmei Guo、Hu Cai、Zheng Zhu、Yufeng Wang、Mingmeng Yang、Ling Huang、Jiuhan Gong
DOI:10.1055/s-0036-1588307
日期:——
An iodine-catalyzed cross-dehydrogenativecouplingreaction of N-alkyl amides and azoles is reported. The catalytic system provides an efficient method for introducing amides onto azoles, especially onto benzotriazoles.