2567-59-1Relevant articles and documents
Benzotriazole xanthate derivative lubricant additive and preparation method thereof
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Paragraph 0044; 0045, (2018/04/01)
The invention discloses a benzotriazole xanthate derivative lubricant additive. According to the invention, the benzotriazole xanthate derivative lubricant additive is prepared according to the following steps: performing amidation on alkylamine and chloroacetyl chloride under the effect of alkali, thereby acquiring alkyl chloroacetamide; performing nucleophilic substitution reaction on benzotriazole, chloropropanol and carbon disulfide, thereby acquiring benzotriazole propyl xanthic sodium or potassium; performing nucleophilic substitution reaction on alkyl chloroacetamide and benzotriazole propyl xanthic sodium or potassium, thereby acquiring a compound with a general formula I. According to the invention, the preparation method is simple, the technical condition is mild, the raw materials are easily acquired, the compounding cost is low and the compounding yield is high. The benzotriazole xanthate derivative can be independently used as an extreme pressure wear-resistant anticorrosion additive of lubricating oil, also can be used together with the other lubricant additives, is capable of obviously promoting the carrying capacity of the base oil, greatly improving the wear-resistant antifriction performance of the base oil and effectively promoting the corrosion resistance of the base oil and is a biodegradable multifunctional lubricant additive.
Synthesis of berberine bromide analogs containing tertiary amides of acetic acid in the 9-O-position
Nechepurenko,Komarova,Vasil'ev,Salakhutdinov
, p. 1047 - 1053 (2013/04/23)
9-O-Acetamide analogs of berberine bromide were prepared in 20-87% yields via reaction of the isoquinoline alkaloid berberrubine with tertiary amides of bromoacetic acid. Aminolysis did not occur during reaction of methyl-2-(9-demethoxyberberine bromide-9-yl)hydroxyacetate with secondary amines. The corresponding acid or its ethyl ester was isolated.
"Crowned" Fe4S4 Clusters as Electrochemical Metal Ion Sensors
Gebbink, Robertus J. M. Klein,Klink, Stephen I.,Feiters, Martinus C.,Nolte, Roeland J. M.
, p. 253 - 264 (2007/10/03)
A series of Fe4S4 cluster compounds I, III, and V, in which the cuboidal cluster core is appended with four crown ether thiolate ligands, and II and IV, bearing thiolate ligands without crown ether parts, has been synthesized and characterized. The spectroscopic and electrochemical properties of these compounds are determined by the electronic nature of the thiolate ligands. Only in the case of III, where a very short α-thioacetyl linker was used to connect the crown ether ligands to the cluster core, was a restricted conformational freedom of the ligand observed. A detailed electrochemical study of the influence of alkali and earth alkali metal ions (Li+, Na+, K+, Mg2+, and Ba2+) on the reversible 2-/3- reduction of the cluster compounds was performed. In the case of the crown ether appended clusters I,III, and V, the addition of these metal ions resulted in an anodic shift, i.e. in positive direction, of the reduction potential (modulation effect) and to larger current responses (promotion effect). The magnitude of the modulation effects is determined by the binding affinity of the metal ions in the crown ether ligands, and by the distance between bound metal ions and the redox active cluster core. Variation of the linker between the cluster core and the metal ion binding site resulted in cluster compounds with almost inverse selectivities for e.g. K+ and Ba2+ in the case of I and III. For the large effects found for compound I a lariat binding mode is proposed.