Magnetic nanosphere [email protected] promoted synthesis of 5-substituted 1H-tetrazoles

Authors

• Bi Bi Fatemeh Mirjalili ¹
• Hadise Jorsarraie ²
• Hamidreza Akrami ³

1. Department of Chemistry, College of Science, Yazd University, Yazd, P.O. Box 89195-741, Iran
2. Department of Chemistry, College of Science, Yazd University, Yazd. P.O. Box 89195-741, Iran.
3. Young Researcher and Elite Club, Yazd Branch, Islamic Azad University, Yazd, Islamic Republic of Iran.

Abstract

Tetrazoles have many interesting futures and applications in drug and energy industries. 5-Substituted 1H-tetrazoles were synthesized via [2+3] cycloaddition reaction of aryl or alkyl nitriles with sodium azide in the presence of Fe₃O₄@SiO₂.SnCl₄ as catalyst in DMF under reflux conditions.  The catalyst was removed from reaction mixture by an external magnet and was reusable for many times without any appreciable loss of its activity. The Fe₃O₄@SiO₂.SnCl₄ promotes synthesis of tetrazole in shorter time than other reported catalysts. The obtained tetrazoles were identified by spectroscopic and physical data such as FT-IR, ¹HNMR and melting point. Easy workup and reusability of catalyst are some advantages of this protocol.

Keywords

• Sodium azide
• [email protected]
• 1H-tetrazoles
• Organonitrile compounds
• Magnetic catalyst. Lewis acid catalyst