l-Proline: An Efficient Organocatalyst for the Synthesis of 5-Substituted 1H-Tetrazoles via [3+2] Cycloaddition of Nitriles and Sodium Azide
作者:Vikas Telvekar、Saket Bhagat
DOI:10.1055/s-0036-1591534
日期:2018.4
A simple and efficient route for the synthesis of a series of 5-substituted 1H-tetrazoles using l -proline as a catalyst from structurally diverse organic nitriles and sodium azide is reported. The prominent features of this environmentally benign, cost effective, and high-yielding l -proline-catalyzed protocol includes simple experimental procedure, short reaction time, simple workup, and excellent
Solvent-free preparation of arylaminotetrazole derivatives using aluminum(III) hydrogensulfate as an effective catalyst
作者:Ferydoon Khamooshi、Ali Reza Modarresi-Alam
DOI:10.1016/j.cclet.2010.03.008
日期:2010.8
Abstract An efficient and simple method for the preparation of 5-arylamino-1H-tetrazole and 1-aryl-5-amino-1H-tetrazole derivatives is reported using aluminum(III) hydrogensulfate (Al(HSO4)3) as an effective heterogeneous catalyst from secondary arylcyanamides. Generally, when the substitution in arylcyanamide is strongly electron-withdrawing the position of equilibrium would shift toward the isomer
Eco-efficient one-pot tandem synthesis of 1-aryl-1H-tetrazol-5-amine by CAN via in situ generated 1-phenylthiourea and heterocumulene
作者:Dasharath D. Kondhare、Venkat V. Bhadke、Sushma S. Deshmukh、Mahesh G. Wakhradkar、Balaji B. Totawar
DOI:10.1016/j.jics.2021.100103
日期:2021.8
Synthesis of arylaminotetrazoles by ZnCl2/AlCl3/silica as an efficient heterogeneous catalyst
作者:Davood Habibi、Mahmoud Nasrollahzadeh
DOI:10.1007/s00706-011-0670-8
日期:2012.6
Arylaminotetrazoles were efficiently synthesized from secondary arylcyanamides by application of ZnCl2/AlCl3/silica as a reusable heterogeneous Lewis acid catalyst. 5-Arylamino-1-tetrazoles can be obtained from arylcyanamides carrying electron-withdrawing substituents on the aryl ring, while with electron-releasing groups 1-aryl-5-amino-1-tetrazoles will be produced. The former isomer is also produced within longer reaction times (similar to 20 h) even with electron-releasing groups.
Kinetics of the Isomerization of Substituted 5-Aminotetrazoles
作者:Ronald A. Henry、William G. Finnegan、Eugene Lieber