2987-53-3Relevant articles and documents
A rare cobalt(III) paramagnetic derivative incorporating 1-alkyl-2-[(o-thioalkyl)phenylazo]imidazole (SMeaaiNEt): EPR, redox and magnetic interpretation
Nandi, Soumendranath,Das, Kuheli,Datta, Amitabha,Roy, Suman,Garribba, Eugenio,Akitsu, Takashiro,Sinha, Chittaranjan
, p. 75 - 81 (2017)
The condensation of 1-alkyl-2-{(o-thioalkyl)phenylazo}imidazole (SMeaaiNEt), Co(ClO4)2, 6H2O and NaN3 in methanol affords a rare Co(III) paramagnetic complex [Co(SMeaaiNEt)(N3)3] (1). Single crystal X-ray diffraction study of complex 1 reveals that the Co(III) possesses a distorted octahedral environment. The EPR study interprets an unusual high-spin Co(III) species with configuration t2g4eg2 and S?=?2. The temperature dependent magnetic interpretation agrees with the existence of intermolecular antiferromagnetic coupling on the paramagnetic Co(III) center. A cyclic voltammetry study displays for complex 1 two quasi-reversible and one irreversible responses at the negative direction which may be assigned to different reduction systems. DFT computation using optimized geometry is governed to explain the electronic nature of cobalt derivative which is in accordance with the experimental evidence.
A Mild Heteroatom (O -, N -, and S -) Methylation Protocol Using Trimethyl Phosphate (TMP)-Ca(OH) 2Combination
Tang, Yu,Yu, Biao
, (2022/03/27)
A mild heteroatom methylation protocol using trimethyl phosphate (TMP)-Ca(OH)2combination has been developed, which proceeds in DMF, or water, or under neat conditions, at 80 °C or at room temperature. A series of O-, N-, and S-nucleophiles, including phenols, sulfonamides, N-heterocycles, such as 9H-carbazole, indole derivatives, and 1,8-naphthalimide, and aryl/alkyl thiols, are suitable substrates for this protocol. The high efficiency, operational simplicity, scalability, cost-efficiency, and environmentally friendly nature of this protocol make it an attractive alternative to the conventional base-promoted heteroatom methylation procedures.
Ionic Reactivity of 2-Isocyanoaryl Thioethers: Access to 2-Halo and 2-Aminobenzothia/Selenazoles
Bao, Lan,Dong, Jinhuan,Hu, Junlin,Jia, Mengying,Liu, Xiaoli,Sun, Shaoguang,Xu, Xianxiu
, (2022/02/23)
An ionic cascade insertion/cyclization reaction of thia-/selena-functionalized arylisocyanides has been successfully developed for the efficient and practical synthesis of 2-halobenzothiazole/benzoselenazole derivatives. This synthetic protocol, incorporating a halogen atom when forming the five-membered ring of benzothia/selenazoles, is different from the existing ones, where halogenation of the preformed benzothia/selenazole precursors happens. Additionally, a facile access to 2-aminobenzothiazoles is also achieved by the one-pot cascade reaction of 2-isocyanoaryl thioethers, iodine, and amines.
Preparation method of o-aminothiophenol
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Paragraph 0033; 0038; 0040; 0042; 0044; 0046; 0048; 0052, (2020/12/30)
The invention provides a preparation method of o-aminothiophenol. The preparation method comprises the following steps: putting o-chloronitrobenzene into sodium methyl mercaptide, and performing heating under the action of a catalyst to carry out a methyl vulcanization reaction so as to prepare o-nitrophenyl dimethyl sulfide; putting o-nitrophenyl thioether into a solvent, and carrying out hydrogenation reduction to prepare o-aminobenzene thioether; and demethylating the o-aminothiophenol under the action of hydrobromic acid to obtain the o-aminothiophenol. The preparation method of o-aminothiophenol has the advantages of high yield and high product purity.
