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Synthesis of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates using nanocrystalline ZnZr4(PO4)6 ceramics as an efficient catalyst | ||
Iranian Journal of Catalysis | ||
مقاله 2، دوره 6، شماره 4، آذر 2016، صفحه 319-324 اصل مقاله (1.09 M) | ||
نوع مقاله: Articles | ||
نویسندگان | ||
Javad Safaei-Ghomi* 1؛ Mehrnoosh Asgari-Kheirabadi1؛ Hossein Shahbazi-Alvi1؛ Abolfazl Ziarati2 | ||
1Department of Organic Chemistry, Faculty of Chemistry, University of Kashan, Kashan, P.O. Box 87317-51167, I. R. Iran. | ||
2School of Chemistry, College of Science, University of Tehran, Tehran 14155-6455, Iran. | ||
چکیده | ||
Nanocrystalline ZnZr4(PO4)6 ceramics as an efficient catalyst have been used for the preparation of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates by the four component reaction of dimethylacetylenedicarboxylate, hydrazinehydrate, malononitrile and aromatic aldehydes in water at room temperature. In this research Nano-ZnZr4(PO4)6 coordinate with the active groups(particular C=O, C≡N and active H) thus increasing the activity of the groups. Also this nanoscale heterogeneous catalysts present higher surface areas which are mainly responsible for their catalytic activity. These surface atoms behave as the centers where the chemical reactions could be catalytically activated. The key advantages of this process are high yields, shorter reaction times, reusability of catalyst, easy work-up, milder reaction conditions and environmentally benign. | ||
کلیدواژهها | ||
Nano-ZnZr4(PO4)6؛ Catalytic activity؛ Pyrano[2؛ 3-c]pyrazole؛ One-pot؛ Multicomponent reaction | ||
مراجع | ||
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