Essey access of various dihydropyranopyrazole derivatives promoted via Sno2 nano-thin films as efficient and reusable catalyst

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 425

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شناسه ملی سند علمی:

IICC20_068

تاریخ نمایه سازی: 2 تیر 1398

چکیده مقاله:

With increasing interest in green chemistry, the development of new eco-friendly methods such as one-pot multicomponent reactions (MCRs) with using recyclable heterogeneous catalysts has been raised. In this study, the catalytic activity of SnO2 based nano thin-films which prepared by spray pyrolysis technique on the inside of beakers has been reported for one-pot synthesis of dihydropyrano[2,3-c]pyrazoles. This catalyst is found to be efficient heterogeneous catalysts for the multicomponent reaction of 3-methyl-1-phenyl-2-pyrazolin-5-one/hydrazine monohydrate, ethyl acetoacetate with malononitrile and aryl aldehydes. The results confirm that SnO2 nano-thin films are a potential catalytic compound for synthesis relevant to pyrazole scaffolds in high yields. Catalyst being heterogeneous lead to reused several times without a significant decrease of catalytic activity, which is in agreement with the principles of green chemistry. SnO2 nano-thin films were developed as an efficient catalyst for the greener synthesis of dihydropyrano[2,3-c]pyrazoles in high yields without any troublous by-products, besides the ease of work-up and purification[1-3].

نویسندگان

Marzieh Cheraghipoor

Department of Chemistry, University of Sistan and Baluchestan, P.O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran

Malek Taher Maghsoodlou

Department of Chemistry, University of Sistan and Baluchestan, P.O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran

Davod Mohebbi-Kalhori

Department of Chemistry, University of Sistan and Baluchestan, P.O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran

Mohammad Reza Faghihi

Department of Chemistry, University of Sistan and Baluchestan, P.O. Box ۹۸۱۳۵-۶۷۴, Zahedan, Iran