Three-component, One-pot Synthesis of Dihydropyrano[۳,۲-c]chromenes in Aqueous Medium in the Presence of Nano-silica Supported ۱,۵-Diazabicyclo(۴.۳.۰)non-۵-en

Publish Year: 1400
نوع سند: مقاله ژورنالی
زبان: English
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تاریخ نمایه سازی: 3 مهر 1402


In this research, a high efficient, simply and rapid method was applied for the synthesis of dihydropyrano[۳,۲-c]chromene derivatives by one-pot, three-component condensation of aldehydes, malononitrile and ۴-hydroxycoumarin in H۲O/ethanol (۱:۱ v/v) under reflux conditions. This reaction was run by using nano-silica supported ۱,۵-Diazabicyclo(۴.۳.۰)non-۵-en (DBN) which has been abbreviated as nano-SiO۲/DBN under aqueous condition. The nano-SiO۲/DBN catalyst was synthesized by reaction between silica chloride and DBN. The main advantages of this procedure are high yields, short reaction times and easy work-up. Furthermore, the catalyst could be reused for five times.


Bi Bi Fatemeh Mirjalili

Yazd University

Maryam Mehravar

Dept. Chemistry, Yazd University

Abdolhamid Bamoniri

Departent of Organic Chemistry, Faculty of Chemistry, University of Kashan

Elaheh Babaei

Department of chemistry, Yazd University