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Usage Statistics Cite this paper as: Dolzhenko, A.; Bera, H.; Keung Chui, W. Synthesis of N-(3(5)-Aryl-1,2,4-triazol-5(3)-yl)-N'-carbethoxythioureas and Their Tautomerism in DMSO Solution. In Proceedings of the 13th Int. Electron. Conf. Synth. Org. Chem., 1-30 November 2009; Sciforum Electronic Conferences Series, 2009, a027:1-6.
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13th Int. Electron. Conf. Synth. Org. Chem. 2009, a027:1-6
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Synthesis of N-(3(5)-Aryl-1,2,4-triazol-5(3)-yl)-N'-carbethoxythioureas and Their Tautomerism in DMSO Solution
Department of Pharmacy, Faculty of Science, National University of Singapore, 18 Science Drive 4, Singapore 117543, Singapore;
* Author to whom correspondence should be addressed.
(This article belongs to the section A. General Organic Synthesis)
Abstract: N-(3(5)-Aryl-1,2,4-triazol-5(3)-yl)-N'-carbethoxythioureas were prepared from ethoxycarbonyl isothiocyanate and 3(5)-amino-5(3)-aryl-1,2,4-triazoles. The annular prototropic tautomerism in the compounds was investigated by 1H NMR in DMSO solution. The tautomeric preferences depended on electronic properties of substituents on the phenyl ring and were well correlated with their Hammett constant values.
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