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1.
Hossein Reza Darabi Abbas Darestani Farahani Mohammad Hashemi Karouei Kioumars Aghapoor Rohoullah Firouzi Rainer Herges 《Supramolecular chemistry》2013,25(9):653-657
A new E,E-stilbenophane was synthesised and characterised. The crystal structure of this cyclophane shows that this molecule has a cup-shaped structure, which hosts a phenyl ring of neighbouring molecule as guest in its cavity with a π–π distance of about 3.7 Å. Moreover, the NMR spectra and theoretical analysis (gauge-independent atomic orbitals (GIAO) and quantum theory of atoms in molecules (QTAIM)) suggest that the silver recognition by E,E-stilbenophane host molecules is based on cation–π interactions in which the π-electrons of the double bonds play a major role. 相似文献
2.
Kioumars Aghapoor Hossein Reza Darabi Kourosh Tabar-Heydar 《Phosphorus, sulfur, and silicon and the related elements》2013,188(5):1183-1187
On the benzyl system, bearing various functional groups, have been carried out the Willgerodt-Kindler reaction to obtain thiobenzmorpholide ( 1 ). The reactions, under solvent-free conditions, were performed in both classical (reflux, room temperature) and nonclassical (microwave) conditions to attempt our elucidation of the reactions pathways. Unlike benzylamine and benzyl mercaptan, benzyl halides give poor result due to the type of amine. The experimental results suggest that the proposed reaction pathway involves the oxidation coupling of benzylic substrates, followed by a thiolation step and an attack of the amine on the thiolated product to give ( 1 ). 相似文献
3.
M. M. Heravi K. Aghapoor M. A. Nooshabadi M. M. Mojtahedi 《Monatshefte für Chemie / Chemical Monthly》1997,128(11):1143-1147
Summary Thiosemicarbazide reacted with 1,2-diaminobenzene to give 1,2-dihydro-3-thioxo-1,2,4-benzotriazine (1) in fairly good yield in a solvent free reaction under microwave irradiation.1 was condensed with prop-2ynyl bromide in the presence of sodium methoxide to afford the corresponding 3-(prop-2-ynylsulfanyl)-1,2,4-benzotriazine (5). Transformation of5 to 3-methylidene-2,3-dihydro-9H-thiazolo[2,3-c][1,2,4]benzotriazine (6) was performed in the presence of a palladium salt.
Regioselektive Anellierung von 3-(prop-2-inylsulfanyl)-1,2,4-benzotriazin zu Thiazolo[2,3-c][1,2,4]benzotriazin
Zusammenfassung Thiosemicarbazid reagierte mit 1,2-Diaminobenzol ohne Lösungsmittel und unter Bestrahlung mit Mikrowellen in guter Ausbeute zu 1,2-Dihydro-3-thioxo-1,2,4-benzotriazin (1), welches in Gegenwart von Natriummethoxid mit Prop-2-inylbromid zum entsprechenden 3-(Prop-2-inylsulfanyl)-1,2,4-benzotriazin (5) kondensiert wurde. Die Umsetzung von5 zu Methyliden-2,3-dihydro-9H-thiazolo[2,3-c] [1,2,4]benzotriazin (6) gelang unter Palladiumkatalyse.相似文献
4.
Hossein R. Darabi Kioumars Aghapoor Kourosh Tabar-Heidar 《Monatshefte für Chemie / Chemical Monthly》2004,135(1):79-81
Summary. Solvent-free irradiation of thiomorpholides with two kinds of methylating agents under microwave or ultrasonic conditions gave the corresponding thioesters in high yield. The method is simple and avoids prolonged heating with solvents. 相似文献
5.
Hossein Reza Darabi Kioumars Aghapoor Kourosh Tabar-Heydar Masoud Nooshabadi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(5):1189-1192
The effect of substrates on the Willgerodt-Kindler reaction was studied. The existence of acidic protons on these substrates accerelates the formation of thiomorpholide was found. 相似文献
6.
Enhanced Efficiency of Dye–sensitized Solar Cells Based on Bulk Synthesized TiO2 Nanorods Annealed at Different Temperatures 下载免费PDF全文
Hani Sayahi Masood Hamadanian Farshid Mohsenzadeh Kioumars Aghapoor Mohammad Ali Kiani 《中国化学会会志》2015,62(9):811-816
In this study, bulk TiO2 nanorods are synthesized by hydrothermal method in order to be used in the dye‐sensitized solar cells (DSSCs). These nanorods are annealed at different temperatures and deposited electrophoretically. The influence of post heat treatment has been thoroughly investigated on fabricated DSSCs using electrochemical impedance spectroscopy (EIS). The results have revealed that the diameter, size and density of the prepared bulk nanorods are function of annealing temperatures. Optimization of the prepared DSSCs has led to an improved efficiency (ca. 3.82%) under AM 1.5 simulated sunlight. 相似文献
7.
Majid M. Heravi Dariush Ajami Kioumars Aghapoor Mitra Ghassemzadeh 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1):151-156
Abstract A simple and selective oxidative deprotection of trimethylsilyl ethers to carbony1 compounds is described that occurs on PdCl2(PhCN)2-CrO3 and bis(trimethylsily1) chromate under solvent free conditions and is expedited by microwave irradiation. 相似文献
8.
Hossein Reza Darabi Ehsan Khatamifar Ali Sharifi Kioumars Aghapoor Khosrow Jadidi 《合成通讯》2017,47(5):428-434
The McMurry coupling of a bis-salisaldehyde 3a with methyl linker as the smallest member of its alkyl series is known to give the remarkably lower yield of the corresponding stilbenophanes. The half part of this molecule, unlike bigger analogues, is a good leaving group which affordsthreo isomer of 4H, 4′H–4,4′-bibenzo[d][1,3]dioxine 4 in high diastereoisomeric ratio (99>). A further study showed that the formation of this key by-product is the reason for formation of other by-products, namely, 5a,10b-dihydrobenzofuro[2,3-b]benzofuran 9 and 2-(2,3-dihydrobenzofuran-2-yl)phenol 10. Two reaction pathways for the formation of by-products have been proposed which are responsible for the unusual activity of dialdehyde 3a. 相似文献
9.
Mohsenzadeh Farshid Darabi Hossein Reza Alivand Mahsa Aghapoor Kioumars Balavar Yadollah 《Research on Chemical Intermediates》2020,46(12):5255-5262
Research on Chemical Intermediates - In this study, common naturally occurring organic acids, namely oxalic, malonic, succinic, tartaric and citric acid (as safe, inexpensive, and biodegradable... 相似文献
10.
Hossein Reza Darabi Leila Sobhani Saeed Rastgar Kioumars Aghapoor Saeed K. Amini Reza Zadmard 《Supramolecular chemistry》2019,31(1):45-51
We have demonstrated the synthesis and characterization of novel E- and Z-stilbenophanes via four reaction steps. X-ray structure analysis showed that the p-electrons of the double bonds and the oxygen atoms pointing towards the center of a cavity of Z-isomer. Both isomers recognize selectively Cu2+ ions over other competing metal ions as measured by UV-vis titration by the detection limit 10–12 µM. The 1:1 ratio complex formation was confirmed by HRMS analysis. Theoretical calculations based on GIAO and CMAD approaches and 1H NMR analysis confirmed the UV-vis data of Z-isomer. 相似文献