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Palladium supported on diaminoglyoxime‐functionalized Fe3O4 nanoparticles as a magnetically separable nanocatalyst in Heck coupling reaction 下载免费PDF全文
A hybrid material of palladium supported on diaminoglyoxime‐functionalized Fe3O4 was used as an effective and recyclable catalyst in Mizoroki–Heck coupling reactions. The catalyst was very effective for the Mizoroki–Heck reaction of aryl halides with styrene and conversion was in most cases excellent. The yields of the products were in the range 75–98%. The catalyst showed good stability and could be recovered and reused for six reaction cycles without significant leaching and loss its catalytic activity. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
965.
A straightforward acylaltion of pyridine derivatives has been developed using K2S2O8 as the oxidant and water as a green solvent. The corresponding 2-acylpyridines were synthesized with high chemo- and regioselectivity in good to high yields. This efficient and practical method could serve as a new tool for the convenient synthesis of 2-benzoylpyridines of interest for future pharmaceutical and chemical applications. 相似文献
966.
Karami Malihe Hasaninejad Alireza Mahdavi Hossein Iraji Aida Mojtabavi Somayeh Faramarzi Mohammad Ali Mahdavi Mohammad 《Molecular diversity》2022,26(5):2393-2405
Molecular Diversity - A green and efficient one-pot multi-component protocol was developed for the synthesis of some novel dihydrochromeno[4,3-b]pyrrol-3-yl derivatives through the reaction of... 相似文献
967.
Zare Abdolkarim Kohzadian Alireza Filian Hossein Nezhad Mariam Sadat Ghoreishi Karami Amirali 《Research on Chemical Intermediates》2022,48(4):1631-1644
Research on Chemical Intermediates - In this research, highly efficient protocols for the production of pyrido[2,3-d:6,5-d′]dipyrimidine and bis(pyrazolyl)methane derivatives using an acid... 相似文献
968.
Phosphated tungstate as a new, reusable and efficient solid phosphoric acid catalyst was synthesized and used to promote the reaction of diaminoglyoxime with various aromatic aldehydes. The prepared phosphated tungstate was characterized using various techniques including X‐ray diffraction, scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier transform infrared spectroscopy and thermal analysis. A wide variety of heterocyclic nitrones were obtained under mild reaction conditions and in high yields by using the prepared catalyst. 相似文献
969.
Liam M. Joyce Dr. Melanie A. Drew Dr. Andrew J. Tague Dr. Thanaphat Thaima Dr. Ali Gouranourimi Dr. Alireza Ariafard Prof. Dr. Stephen G. Pyne Prof. Dr. Christopher J. T. Hyland 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(12):e202104022
Thermally induced cycloisomerization reactions of 1,6-allenynes gives α-methylene-γ-lactams via intramolecular Alder-ene reactions. The mechanism is supported by computational and deuterium labelling studies. This thermal, non-radical method enables the discovery of a hitherto unknown route that proceeds via a divergent mechanism distinct from the previous [2+2] cycloisomerization manifold. 相似文献
970.
Ghodsi Mohammadi Ziarani Parisa Gholamzadeh Alireza Badiei Vaezeh Fathi Vavsari 《Research on Chemical Intermediates》2018,44(1):277-288
Pyruvic acid contains three different reactive positions: –COOH, ketone carbonyl and methyl groups. Correspondingly, pyruvic acid was applied as starting material in the modified Niementowski reaction and Aldol condensation using SBA-Pr-SO3H as an efficient nanocatalyst. Aldol condensation of pyruvic acid and oxindole provided a new oxindol-based carboxylic acid which was subsequently used in the Ugi four-component reaction. Moreover, through the modified Niementowski reaction of pyruvic acid, new derivatives of quiazoline were produced in the presence of SBA-Pr-SO3H. The obtained products are important due to their potentially biological active skeletons. 相似文献