Abstract
Arylaminotetrazoles were efficiently synthesized from secondary arylcyanamides by application of ZnCl2/AlCl3/silica as a reusable heterogeneous Lewis acid catalyst. 5-Arylamino-1H-tetrazoles can be obtained from arylcyanamides carrying electron-withdrawing substituents on the aryl ring, while with electron-releasing groups 1-aryl-5-amino-1H-tetrazoles will be produced. The former isomer is also produced within longer reaction times (~20 h) even with electron-releasing groups.
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The authors gratefully acknowledge the financial support from the Bu-Ali Sina University, Hamedan 6517838683, Iran.
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Contains information about the catalyst characterization by powder X-ray diffraction (XRD) and FT-IR techniques as well as the NMR spectra of the synthesized aminotetrazoles.
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Habibi, D., Nasrollahzadeh, M. Synthesis of arylaminotetrazoles by ZnCl2/AlCl3/silica as an efficient heterogeneous catalyst. Monatsh Chem 143, 925–930 (2012). https://doi.org/10.1007/s00706-011-0670-8
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DOI: https://doi.org/10.1007/s00706-011-0670-8