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Abbas Teimouri,Ali Reza Najafi Chermahini,M. Narimani 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.5
A simple highly versatile and efficient method has been developed for the three-component coupling of aldehydes, amines and alkynes to prepare propargylamines, in the presence of a catalytic amount of BiCl3. The advantages of methods are high yield, mild reaction conditions, no environmental pollution and easy work up procedure.
Bahareh Reisi,Ali Reza Najafi Chermahini,Daily Rodríguez-Padrón,Mario J. Muñoz-Batista,Rafael Luque 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
Bimetallic Pd-Ni catalysts were prepared via impregnation method, with effects of Pd/Ni ratio (wt%) ontheir catalytic performance for the oxidation of cyclohexane with molecular oxygen being investigated. Synthesized catalysts were characterized by a series of techniques including XRD, Nitrogen adsorption–desorption, H2-TPR, XPS, ICP-AES, TEM, SEM, and EDX. Compared to monometallic Pd, the additionof Ni to Pd was found to be effective in enhancing the selective oxidation of cyclohexane. Parameters suchas the temperature of the reaction, reaction times, catalyst amount, initial oxygen pressure and differentsolvents were investigated. Optimum conditions to improve cyclohexane conversion and selectivitytowards KA-oil (a mixture of cyclohexanone and cyclohexanol) over 4.0%Pd-4.0%Ni/KIT-6 catalystincluded 140 C, 1.0 MPa O2 and acetonitrile as solvent. Under these reaction conditions, 10.87 % conversionand 95.45 % selectivity for KA-oil were observed after 8 h of reaction. Reusability studies of theselected catalyst revealed an outstanding stability along four reaction cycles.
Dabbagh, Hossein A.,Najafi Chermahini, Ali Reza,Modarresi-Alam, Ali Reza Korean Chemical Society 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
The conformational, configurtational behavior and the structure of N-2-(1,4-Dioxane)-N'-(4-methylbenzenesulfonyl)-O-(4-methylphenoxy) isourea 1 has been studied using DFT method. Calculations predict the imidoyl amino group of the dioxane ring prefers axial conformation and that the tosyl and tolyl groups about the C=N bond retain E configuration. The anomeric effect controls the population of dioxane ring conformers, and anomers. Intramolecular hydrogen bonds contribute to the stability of E isomers. The computational analysis of 1 complements the X-ray findings.
Hossein A. Dabbagh,Ali Reza Najafi Chermahini,Ali Reza Modarresi-Alam 대한화학회 2005 Bulletin of the Korean Chemical Society Vol.26 No.8
The conformational, configurtational behavior and the structure of N-2-(1,4-Dioxane)-N'-(4-methylbenzenesulfonyl)-O-(4-methylphenoxy) isourea 1 has been studied using DFT method. Calculations predict the imidoyl amino group of the dioxane ring prefers axial conformation and that the tosyl and tolyl groups about the C=N bond retain E configuration. The anomeric effect controls the population of dioxane ring conformers, and anomers. Intramolecular hydrogen bonds contribute to the stability of E isomers. The computational analysis of 1 complements the X-ray findings.