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.
报道了一种通过有机腈酰胺离子与腈亚胺偶极的选择性,形式,1,3-偶极环加成反应合成1,2,4-三唑-3-亚胺的简便方法。1,2,4-三唑-3-亚胺的水解产生相应的1,2,4-三唑-5-酮。调用DFT计算支持的逐步机制来解释反应的选择性。