38147-72-7Relevant academic research and scientific papers
Nickel-catalyzed oxidative C-H/N-H annulation of N-heteroaromatic compounds with alkynes
Obata, Atsushi,Sasagawa, Akane,Yamazaki, Ken,Ano, Yusuke,Chatani, Naoto
, p. 3242 - 3248 (2019/03/21)
The reaction of N-heteroaromatic compounds, such as 2-aryl-pyrrole, benzimidazole, imidazole, indole, and pyrazole derivatives, with alkynes in the presence of a catalytic amount of a nickel complex results in C-H/N-H oxidative annulation. The reaction shows a high functional group compatibility. While both Ni(0) and Ni(ii) complexes show a high catalytic activity, Ni(0) is proposed as a key catalytic species in the main catalytic cycle. In the case of the Ni(ii) system, the presence of a catalytic amount of a strong base, such as KOBut, is required for the reaction to proceed. In sharp contrast, a base is not required in the case of the Ni(0) system. The proposed mechanism is supported by DFT studies.
(Benz)Imidazole-Directed Cobalt(III)-Catalyzed C–H Activation of Arenes: A Facile Strategy to Access Polyheteroarenes by Oxidative Annulation
Dutta, Pratip Kumar,Sen, Subhabrata
, p. 5512 - 5519 (2018/10/24)
A facile cobalt(III) catalyzed C–H activation of arenes with substituted (benz)imidazoles as directing groups (DG) is reported. The strategy was utilized for the synthesis of polyheteroarenes when appropriate substrates were treated with diarylacetylenes as the coupling partner. The desired compounds were synthesized in moderate to excellent yield. A putative reaction mechanism is proposed. The final compounds revealed photoluminescence properties.
Metal complexes
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Page/Page column 100; 101, (2016/10/10)
The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.
Ruthenium catalyzed oxidative annulation with alkynes via cascade C-H/N-H bond functionalizations
Wang, Rui,Falck
supporting information, p. 33 - 36 (2014/04/03)
Ruthenium(II) complexes catalyzed tandem C-H/N-H bonds functionalizations of 2-phenyl imidazole and its derivatives with alkynes were realized. This transformations allowed for rapid synthesis of isoquinoline derivatives under open-flask condition. Publis
Fluorescent naphthyl- and anthrylazoles from the catalytic coupling of phenylazoles with internal alkynes through the cleavage of multiple C-H bonds
Umeda, Nobuyoshi,Tsurugi, Hayato,Satoh, Tetsuya,Miura, Masahiro
supporting information; experimental part, p. 4019 - 4022 (2009/02/08)
(Chemical Equation Presented) Bright light rings: The direct coupling of phenylazoles with an internal alkyne proceeds efficiently in the presence of a rhodium catalyst and a copper oxidant to selectively give either the 1-naphthyl- or 1-anthrylazole derivatives through the cleavage of multiple C-H bonds (see scheme; 1-naphthylazole derivative not shown). Some of the products exhibit intense fluorescence in the solid state.
