3217-00-3Relevant articles and documents
Homo and heterodinuclear complexes derived from unsymmetrical macrocyclic ligands with two coordination sites: Removal of a pendant arm and migration of copper ion upon cyclization
Golchoubian, Hamid,Fateh, Davood Sadeghi,Bruno, Giuseppe,Rudbari, Hadi Amiri
, p. 1970 - 1991 (2012)
The dinucleating macrocyclic ligands (L2a)2- and (L2b)2- were prepared by [1:1] cyclic condensation of N,N′-dipropionitrile-N,N′-ethylene-di(5-methyl-3-formyl-2- hydroxybenzylamine or N,N′-dipropionitrile-N,N′-ethylene-di(5-bromo- 3-formyl-2-hydroxybenzylamine with 1,3-diaminopropane. The ligands include dissimilar N(amine)2O2 and N(imine)2O 2 coordination sites sharing two phenolic oxygen atoms and containing two propionitrile pendant arms on the amine nitrogen atoms. A series of mono- and dinuclear complexes were synthesized and characterized on the basis of elemental analysis, molar conductance measurement, X-ray crystallography, IR, NMR, and UV-Vis spectroscopies as well as cyclic voltammetric measurements. During the cyclization copper(II) migrates from the N(amine)2O 2 to the N(imine)2O2 coordination site and one of the propionitrile pendant arms is removed. The heterodinuclear complexes [ZnL2Cu(OAc)]+ were prepared by a transmetallation reaction. The characterization results showed that the two metal ions are bridged by two phenolic oxygen atoms and an acetate group, providing distorted five-coordinate geometries for both metals.
Propanil emulsifiable concentrate herbicide and preparation method thereof
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Paragraph 0037; 0068; 0075; 0078; 0085; 0088; 0095, (2021/10/27)
The invention discloses a propanil emulsifiable concentrate herbicide, belongs to the technical field of herbicides, and comprises the following raw materials in percentage by weight: 1 - 35% parts of propanil. Ether 1 - 20%, isophorone 1 - 20%, crowndaisy chrysanthemum extract 4 - 15%, potassium nitrate 2 - 10%, emulsifier 3 - 5%, dispersant 1 - 3%, defoaming agent 1 - 3%, ultraviolet absorber 3 - 6%, vegetable oil 10 - 20% and the balance are carrier. The invention further discloses a preparation method of the herbicide. In the herbicide formula, the ultraviolet absorbent is added in the herbicide formula, so that the compound herbicide has the effects of oxidation resistance, aging resistance, ultraviolet aging resistance, effective component visible light decomposition, and persistent drug effect.
METHOD FOR PREPARING N,N'-BIS(2-CYANOETHYL)-1,2-ETHYLENEDIAMINE BY USING CATION EXCHANGE RESIN AS CATALYST
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Paragraph 0032; 0033; 0035; 0036, (2017/06/23)
A method for preparing N,N′-bis(2-cyanoethyl)-1,2-ethylenediamine involves using strongly acidic cation exchange resin as a catalyst for synthesis, and is advantageous for not only eliminating the need of distillation for purification and thereby reducing reaction time, but also improving the yield of N,N′-bis(2-cyanoethyl)-1,2-ethylenediamine to 97.70-98.08%; and the method benefits simplified process and reduced costs and helps to save water significantly, thereby minimizing environmental pollution.
Probing Carbocatalytic Activity of Carbon Nanodots for the Synthesis of Biologically Active Dihydro/Spiro/Glyco Quinazolinones and Aza-Michael Adducts
Majumdar, Biju,Mandani, Sonam,Bhattacharya, Tamalika,Sarma, Daisy,Sarma, Tridib K.
, p. 2097 - 2106 (2017/02/26)
Herein, we report the fluorescent carbon dots as an effective and recyclable carbocatalyst for the generation of carbon-heteroatom bond leading to quinazolinone derivatives and aza-Michael adducts under mild reaction conditions. The results establish this nanoscale form of carbon as an alternative carbocatalyst for important acid catalyzed organic transformations. The mild surface acidity of carbon dots imparted by -COOH functionality could effectively catalyze the formation of synthetically challenging spiro/glycoquinazolinones under the present reaction conditions.