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1.
Shahrzad Abdolmohammadi 《Tetrahedron letters》2007,48(18):3299-3303
Diammonium hydrogen phosphate, (NH4)2HPO4(DAHP), efficiently catalyzes the one-pot, three-component reaction of an aromatic aldehyde, malononitrile and 4-hydroxycoumarin in aqueous media under mild conditions at room temperature, to afford the corresponding dihydropyrano[c]chromenes in high yields. (S)-Proline has also been used as another neutral catalyst for this reaction at reflux. 相似文献
2.
Mitra Ebrahimi Shahrzad Abdolmohammadi Reza Kia-Kojoori 《Journal of heterocyclic chemistry》2020,57(4):1875-1881
Ag2Cr2O7 nanoparticles were found to be an exceedingly effective catalyst for the mild and green synthesis of aminobenzochromenes. The reaction was performed under ultrasonic irradiation as an innocuous tool and in water as a green solvent at room temperature. This method encompasses several sustainable and economic benefits. 相似文献
3.
Yanxia Tang Hamid Reza Abdolmohammadi Abdul Jalil M Khalaf Ye Tian Tomasz Kapitaniak 《Pramana》2018,90(1):11
Polarisation of the particle spin can be an important problem for different plasmas. In this article, the contribution of the electron spin on the growth rate of the temperature anisotropy of electromagnetic instabilities has been investigated. Results show that polarisation of the electron spin will restrict the instability growth rate while instability can survive due to the spin-depolarised electrons even when the requested temperature anisotropy is vanished. Instability can reach the damping state exponentially due to the spin-polarised electrons while it can grow linearly due to the spin-depolarised (the semi-classical) electrons. 相似文献
4.
Shahrzad Abdolmohammadi Shahab Shariati Narges Elmi Fard Amir Samani 《Journal of heterocyclic chemistry》2020,57(7):2729-2737
In this work, a series of eight new spiro[3,4′]1,3-dihydro-2H-indol-2-one-2′-amino-4′,6′,7′,8′-tetrahydro-2′,5’(1’H,3’H)-quinazoline-diones were successfully synthesized through a three-component reaction of 1H-indole-2,3-diones (isatins), guanidine nitrate, and 1,3-cyclohexanediones, by use of Kit-6 mesoporous silica coated Fe3O4 nanoparticles (Fe3O4@SiO2@KIT-6) as a highly efficient magnetically separable nanocatalyst in aqueous media at 60°C. Several notable features of thiseco-friendly protocol are high yields of products, short reaction times, operational simplicity, and the use of easily available and recyclable catalyst. 相似文献
5.
Abdolmohammadi Shahrzad Hossaini Zinatossadat Poor Heravi Mohammad Reza 《Molecular diversity》2022,26(4):1983-1993
Molecular Diversity - A new series of azo chromene dyes were synthesized via a facile cyclocondensation reaction of (E)-1,2-diphenyl-1-diazene and 4-aminocoumarin with 1:2 molar ratio catalyzed by... 相似文献
6.
Zare Davijani Neda Kia-Kojoori Reza Abdolmohammadi Shahrzad Sadegh-Samiei Sepehr 《Molecular diversity》2022,26(4):2121-2134
Molecular Diversity - In this research, we synthesized the Fe3O4/CuO/ZnO@MWCNT magnetic nanocomposites using water extract of Petasites hybridus rhizome, and the high performance of synthesized... 相似文献
7.
Hamid Reza Abdolmohammadi Abdul Jalil M Khalaf Shirin Panahi Karthikeyan Rajagopal Viet-Thanh Pham Sajad Jafari 《Pramana》2018,90(6):70
Nowadays, designing chaotic systems with hidden attractor is one of the most interesting topics in nonlinear dynamics and chaos. In this paper, a new 4D chaotic system is proposed. This new chaotic system has no equilibria, and so it belongs to the category of systems with hidden attractors. Dynamical features of this system are investigated with the help of its state-space portraits, bifurcation diagram, Lyapunov exponents diagram, and basin of attraction. Also a hardware realisation of this system is proposed by using field programmable gate arrays (FPGA). In addition, an electronic circuit design for the chaotic system is introduced. 相似文献
8.
Diammonium hydrogen phosphate, (NH(4))(2)HPO(4), was used as a catalyst for one-pot, three-component condensation reactions consisting of aromatic aldehydes, malononitrile and barbituric/thiobarbituric acid in aqueous ethanol at room temperature. This method has the advantages of a simple operation, mild reaction conditions, high yields, by using a less toxic and low cost chemical as a catalyst. 相似文献
9.
Shahrzad Abdolmohammadi 《中国化学快报》2012,23(9):1003-1006
The one-pot three-component reaction of arylmethylidenepyruvic acids,1,3-cyclohexandiones and ammonium acetate provides an economical and efficient synthetic route to 5-oxo-4-aryl-l,4,5,6,7,8-hexahydro-2-quinolinecarboxylic acid 4 under solvent-free conditions using a catalytic amount of TiO2 nanoparticles(TiO2 NPs) as an effective heterogeneous catalyst. 相似文献
10.
In this work, we have explored the structural, electronic properties, 13C and 1H NMR parameters and first hyperpolarizability of Ru(NHC)2Cl2(CH‐p‐C6H4X) complexes (XH, F, Cl, Me, NH2, OH, CN, NO2, CHO, COOH) by mpw1pw91 quantum method. The X‐substituent effect on structural parameters, frontier orbital energies, spectroscopic (1H and 13C NMR, UV) of complex was carried out. The results indicate that the substituent has played a significant role on the structures and properties of complex. 1H and 13C NMR chemical shifts were calculated by using the gauge‐invariant atomic orbital (GIAO) method. Total and partial density of state (TDOS and PDOS) and also overlap population density of state (OPDOS) diagrams analysis were exhibited. In analyzing the bonding characteristics of this structure, Ru‐Ccarbene and Ru‐CNHC bonds were identified and characterized in details by Natural bond orbital (NBO) analysis. 相似文献