New magnetic nanocomposites of ZrO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>–Fe<sub>3</sub>O<sub>4</sub>as green solid acid catalysts in organic reactions
作者:Anqi Wang、Xiang Liu、Zhongxing Su、Huanwang Jing
DOI:10.1039/c3cy00572k
日期:——
A series of magnetic solid acid nano-catalysts were designed and prepared through a facile co-precipitate approach. The original nanocomposites ZrO2âAl2O3âFe3O4 were characterized by means of ICP-AES, BET, XRD, TEM, HRTEM, VSM, FT-IR, NH3-TPD and TG. Their catalytic behaviours were investigated via esterification, the synthesis of bis-indolylmethanes, Hantzsch reaction, Biginelli reaction and Pechmann reaction. In all of these organic reactions, the corresponding products were obtained in moderate to excellent yields. The optimal catalyst was ZAF-16/16, which retained catalytic activity after several recycles.
acid as a heterogeneous eco friendly catalyst for the synthesis of 1,4 dihydropyridines undersolventfreeconditions via Hantzsch three component reaction of an aldehyde, ethyl acetoacetate and ammonium acetate at 100 °C for 2–5 h. In silico studies were performed on twenty two possible 1,4 dihydropyridines (DHPs) analogues against K+ channel receptor (KcsA). In order to validate in silico studies
Solid state photochemistry of 1,4-dihydropyridines
作者:Hamid R. Memarian、Arsalan Mirjafari
DOI:10.1016/j.bmcl.2005.05.026
日期:2005.7
Photochemical behavior of some 1,4-dihydropyridines has been investigated in the solidstate. Whereas upon irradiation of 1,4-dihydropyridines in solution phase, their photo-oxidation and formation of pyridine derivatives have been observed, irradiation of these compounds in the solidstate decreases their light sensitivity. In many cases photo-oxidation has been observed only in very low yields.
Efficient Oxidation of Hantzsch 1,4-Dihydropyridines with Nicotinium Dichromate
作者:M. M. Sadeghi、I. Mohammadpoor-Baltork、H. R. Memarian、S. Sobhani
DOI:10.1080/00397910008087204
日期:2000.4.1
A convenient method for the oxidation of various 4-substituted Hantzsch 1,4-dihydropyridines with nicotinium dichromate (NDC) in refluxing acetonitrile is reported. The yields obtained are excellent.
Mohammadpoor-Baltork, Iraj; Sadeghi, Majid M. M.; Memarian, Hamid Reza, Journal of Chemical Research, 2000, vol. 2000, # 1, p. 40 - 41
作者:Mohammadpoor-Baltork, Iraj、Sadeghi, Majid M. M.、Memarian, Hamid Reza、Pairow, Raihaneh