Acid-catalyzed reaction of 4-methyl-1,2,4-triazoline-3,5-dione (MeTAD) with substituted benzenes
作者:Gary W. Breton
DOI:10.1016/j.tetlet.2010.12.024
日期:2011.2
The reaction of 4-methyl-1,2,4-triazoline-3,5-dione (MeTAD) with substituted benzenes under the influence of trifluoroacetic acid catalysis was investigated. Generally, good-to-high yields of 1-arylurazoles resulting from aromatic substitution were obtained. Successful reaction required moderately electron-rich aromatics with proper substitution patterns. The reaction was tolerant of functionality
Intermediacy of a Persistent Urazole Radical and an Electrophilic Diazenium Species in the Acid-Catalyzed Reaction of MeTAD with Anisole
作者:Gary W. Breton、Alice H. Suroviec
DOI:10.1021/acs.joc.5b02520
日期:2016.1.4
capable of further reaction with the initially formed monosubstituted urazole to afford a persistent urazole radical. The identity of this radical has been established by UV–vis spectroscopy, the nature of its self-dimerization reaction, and via independent generation. Electrochemical oxidation of this radical was carried out, and the resulting diazenium ion was demonstrated to be reactive with added