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Aghahosseini, Hamideh,Ramazani, Ali,Ś,lepokura, Katarzyna,Lis, Tadeusz,Joo, Sang Woo Informa UK (TaylorFrancis) 2017 Phosphorus, sulfur, and silicon and the related el Vol.192 No.6
<P>An efficient synthesis of a new 2-chlorobenzyl ammonium salt of phosphonic acid from the reaction of diethyl phosphite with 2-chlorobenzyl amine is described at moderate temperature in catalyst- and solvent-free conditions. The structure of this phosphonic acid salt was confirmed by FT-IR, H-1, C-13, and P-31 NMR spectroscopy, and single crystal X-ray structure analysis.</P>
Ramazani, Ali,Ahmadi, Yavar,Fattahi, Nadia,Ahankar, Hamideh,Pakzad, Mousa,Aghahosseini, Hamideh,Rezaei, Aram,Fardood, Saeid Taghavi,Joo, Sang Woo Informa UK (TaylorFrancis) 2016 Phosphorus, sulfur, and silicon and the related el Vol.191 No.7
<P>The 1:1 imine intermediate generated by the addition of a primary amine to cyclohexanone trapped by N-isocyaniminotriphenylphosphorane (NICITPP) in the presence of aromatic carboxylic acids and the corresponding iminophosphorane intermediate was formed. Disubstituted 1,3,4-oxadiazole derivatives are formed via intramolecular aza-Wittig reaction of the iminophosphorane intermediate. The reactions were completed in neutral conditions at room temperature (18-26 degrees C). The disubstituted 1,3,4-oxadiazole derivatives were produced in excellent yields. [GRAPHICS]</P>
Roghayeh Tarasi,Ali Ramazani,Massomeh Ghorbanloo,Mehdi Khoobi,Hamideh Aghahosseini,주상우,Abbas Shafiee 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.4
The manganese-containing mesoporous nanomaterial (MCM-41@PEIMn) was synthesized and used as a catalyst for the oxidation of cyclohexene, ethyl benzene, and toluene. The mesoporous MCM-41 was prepared via hydrothermal method and then polyethylenimine as a reactive surface modifier was grafted on its surface in the presence of ([3-(2,3-epoxypropoxy)propyl] trimethoxysilane) as a grafting agent. Manganese(ii) acetate was loaded onto the prepared MCM-41@PEI. The MCM-41, MCM-41@PEI, and MCM-41@PEI.Mn were characterized and elucidated by Fourier transform infrared, powder X-ray diffraction, thermogravimetric, N2 adsorption–desorption, energy-dispersive X-ray spectroscopy, scanning electron microscopy, and transmission electron microscopy techniques. The catalytic activity and selectivity of the MCM-41@PEI.Mn in the oxidation of cyclohexene, ethyl benzene, and toluene with 30% aqueous H2O2 as an oxidant were studied. Furthermore, the influences of various parameters such as temperature, oxidant amount, catalyst reusability, and kinds of solvents have been studied. The results showed that the manganese-containing mesoporous nanomaterial was easily separated from the reaction mixture and reused at least five times without noticeable loss of activity.