609-71-2Relevant articles and documents
Synthesis, characterization and electrochemical investigations of mixed-ligand copper(II)-organic supramolecular frameworks
Singh, Sandeep K.,Srivastava, Ashish Kumar,Srivastava, Krishna,Banerjee, Rahul,Prasad, Jagdish
, p. 549 - 557 (2017)
Two mixed-ligand copper(II)-organic coordination compounds with 5,5′-dimethyl-2,2′-bipyridine (5,5′-Me2bpy) as a primary ligand while aliphatic malonate (Hmal) and aromatic 2-hydroxynicotinate (2-OHNA) as secondary ligands, were synthesized. These complexes are formulated as: [Cu(Hmal)(5,5′-Me2bpy)(H2O)](ClO4) 1 and [Cu2(2-OHNA)2(5,5′-Me2bpy)2(NO3)](NO3) 2. These two complexes were structurally characterized by single crystal X-ray diffraction analysis. Characterization was further supported by powder X-ray diffraction analysis, elemental analyses, FT-IR, FAB-MASS and TGA, DSC studies. Cyclic voltammetric and UV-visible spectral studies of these two complexes have also been done. The electrochemical studies of complex 1 in DMSO and DMF have shown that this complex undergoes quasi-reversible diffusion-controlled one-electron transfer reaction without any chemical complication while complex 2 in DMSO undergoes quasi-reversible diffusion-controlled one electron transfer reaction, following EC mechanism. The electrochemical behaviour of complex 2 in DMF is complicated probably due to presence of more than one species in solution phase.
Preparation method of 2-chloronicotinic acid
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Paragraph 0023-0028, (2021/06/26)
The invention relates to a preparation method of 2-chloronicotinic acid. 2-chloronicotinic acid as a product is obtained by two steps of reactions of carboxylation and chlorination of 2-hydroxypyridine in an organic solvent at a certain temperature. The method provided by the invention has the advantages of more raw material sources, obvious cost advantage, safer and more convenient preparation method, high total yield and less three wastes, especially can avoid the use of phosphine oxychloride or triphosgene, and is beneficial to industrialization.
Halogen–metal exchange on bromoheterocyclics with substituents containing an acidic proton via formation of a magnesium intermediate
Tian, Qingqiang,Shang, Suqin,Wang, Huajun,Shi, Guoqiang,Li, Zhiyao,Yuan, Jianyong
supporting information, (2017/12/05)
A selective and practical bromine–metal exchange on bromoheterocyclics bearing substituents with an acidic proton under non-cryogenic conditions was developed by a simple modification of an existing protocol. Our protocol of using a combination of i-PrMgCl and n-BuLi has not only solved the problem of intermolecular quenching that often occurred when using alkyl lithium alone as the reagent for halogen–lithium exchange, but also offered a highly selective method for performing bromo–metal exchange on dibrominated arene compounds through chelation effect.