OSU-6, an MCM-41 type hexagonal mesoporous silica with mild Brönsted acid properties, has been used as an efficient, metal-free, heterogeneous catalyst for the click synthesis of 5-benzyl and 5-aryl-1H-tetrazoles from nitriles in DMF at 90 °C. This catalyst offers advantages including ease of operation, milder conditions, high yields, and reusability. Studies are presented that demonstrate the ...

The azotetrazole moiety represents a great platform for energetic materials, it offers planar and nitrogen-rich backbone, combined with high heat of formation, which easily can be functionalized tuned. Herein, we start from sodium 5-aminotetrazolate obtain two isomers by substitution reaction 2-chloroethanol. Azidoethyl nitratoethyl substituted azo- tetrazoles were finally synthesized oxidative...

5-Substituted-1H-tetrazoles were synthesized by the [3 + 2] cycloaddition of sodium azide with various nitriles in the presence of nickel zirconium phosphate (NiZrP) as an effective heterogeneous catalyst in dimethylsulfoxide at 120 °C. This method has the advantages of good to high yields, simple methodology and easy work-up. The catalyst can be recovered by centrifuging and reused with good y...