Synthesis of 1,2,4-Triazol-3-imines via Selective Stepwise Cycloaddition of Nitrile Imines with Organo-cyanamides
作者:Pallavi Sharma、Shreesha V. Bhat、M. R. Ranga Prabhath、Andrew Molino、Elisa Nauha、David J. D. Wilson、John E. Moses
DOI:10.1021/acs.orglett.8b01673
日期:2018.7.20
A convenient method for the synthesis of 1,2,4-triazol-3-imines through a selective, formal, 1,3-dipolar cycloaddition of organo-cyanamide ions with nitrile imine dipoles is reported. Hydrolysis of the 1,2,4-triazol-3-imines yields the corresponding 1,2,4-triazol-5-ones. A stepwise mechanism, supported by DFT calculations, is invoked to explain the reaction selectivity.
Microwave assisted one-pot tandem three-component synthesis of 2,4,5-triary1-2-4-dihydro-3H-1,2,4-triazol-3-one derivatives
作者:Bagher Mohammadi、Mehdi Adib
DOI:10.1016/j.cclet.2013.12.018
日期:2014.4
This work described a one-pot tandem three-component synthesis of 2,4,5-triaryl-2,4-dihydro-3H-1,2,4-triazol-3-ones using a simple reaction between phenylhydrazines, benzaldehydes and phenyl isocyanates under microwave irradiation and solvent-free conditions in good to excellent yields.
这项工作描述了使用苯肼,苯甲醛和苯甲醛之间的简单反应,一锅串联的三组分合成2,4,5-三芳基-2,4-二氢-3 H -1,2,4-三唑-3-酮。在微波辐射和无溶剂条件下,异氰酸苯酯的收率良好至优异。
Milcent, Rene; Nguyen, Thu-Huong, Journal of Heterocyclic Chemistry, 1986, vol. 23, # 3, p. 881 - 883
作者:Milcent, Rene、Nguyen, Thu-Huong
DOI:——
日期:——
NGUYEN, THU-HUONG;MILCENT, R.;BARBIER, G., J. HETEROCYCL. CHEM., 1985, 22, N 5, 1383-1388