230-17-1Relevant articles and documents
Consequent Construction of C-C and C-N Bonds via Palladium-Catalyzed Dual C-H Activation: Synthesis of Benzo[ c]cinnoline Derivatives
Li, Hongsheng,Zhao, Junhao,Yi, Songjian,Hu, Kongzhen,Feng, Pengju
, p. 880 - 889 (2021)
A highly efficient palladium-catalyzed cascade annulation of pyrazolones and aryl iodides to access various benzo[c]cinnoline derivatives has been achieved at 80 °C. A pyridine-type ligand could improve the reaction efficiency under current reaction conditions, giving a higher product yield up to 94%. This novel approach provided a one-pot dual C-H activation strategy with good functional group tolerance, such as halogen, methoxy, nitro, ester, phenol, and so forth. The product could readily convert into cinnoline derivatives.
Well-defined styryl and biphenyl calcium complexes from dilithio compounds and calcium iodide: Synthesis, structure and reactivity toward nitrous oxide
Wei, Baosheng,Zhang, Wen-Xiong,Xi, Zhenfeng
, p. 12540 - 12545 (2018)
Efficient synthesis and structure elucidation of carbon-calcium σ-bonded compounds are of remarkable interest and importance in organometallic chemistry of the heavier s-block metals. In this paper, we report that styryl and biphenyl calcium complexes wit
Dewar,M.J.S.,Poesche,W.H.
, p. 2201 - 2203 (1963)
Stable Organic Neutral Diradical via Reversible Coordination
Lu, Zhenpin,Quanz, Henrik,Burghaus, Olaf,Hofmann, Jonas,Logemann, Christian,Beeck, Sebastian,Schreiner, Peter R.,Wegner, Hermann A.
, p. 18488 - 18491 (2017)
We report the formation of a stable neutral diboron diradical simply by coordination of an aromatic dinitrogen compound to an ortho-phenyldiborane. This process is reversible upon addition of pyridine. The diradical species is stable above 200 °C. Computations are consistent with an open-shell triplet diradical with a very small open-shell singlet-triplet energy gap that is indicative of the electronic disjointness of the two radical sites. This opens a new way of generating stable radicals with fascinating electronic properties useful for a large variety of applications.
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Szmant,H.H.,Chow,Y.L.
, p. 2887 - 2889 (1971)
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Chemoselective electrochemical reduction of nitroarenes with gaseous ammonia
Chang, Liu,Li, Jin,Wu, Na,Cheng, Xu
supporting information, p. 2468 - 2472 (2021/04/02)
Valuable aromatic nitrogen compounds can be synthesized by reduction of nitroarenes. Herein, we report electrochemical reduction of nitroarenes by a protocol that uses inert graphite felt as electrodes and ammonia as a reductant. Depending on the cell voltage and the solvent, the protocol can be used to obtain aromatic azoxy, azo, and hydrazo compounds, as well as aniline derivatives with high chemoselectivities. The protocol can be readily scaled up to >10 g with no decrease in yield, demonstrating its potential synthetic utility. A stepwise cathodic reduction pathway was proposed to account for the generations of products in turn.
Cu-Catalyzed tandem: N -arylation of phthalhydrazides with cyclic iodoniums to yield dihydrobenzo [c] cinnolines
Kong, Xiangfei,Li, Shiqing,Lv, Hongxu,Xie, Rongrong,Ye, Xiuqing
, p. 4824 - 4830 (2020/07/13)
Dihydrocinnolines have significant pharmacological properties. Herein, we investigate a Cu-catalyzed tandem N-arylation reaction of phthalhydrazides with cyclic iodonium salts to construct dihydrobenzo[c]cinnoline derivatives. Various iodonium salts, such as symmetrical, unsymmetrical, aryl-aryl, and aryl-heteroaryl ones, could react with phthalhydrazides smoothly and give the title products in moderate to high yields. Moreover, the -NH2 group, which has been diarylated by cyclic iodonium salts to form carbazoles in previous reports, is also well tolerated in this work. This journal is