The one-pot reaction of sterically hindered hydrazones with tellurium dichloride or tellurium tetrahalide in the presence of triethylamine in benzene afforded Δ3-1,3,4-telluradiazolines 1, a novel heterocycle, via 1,3-dipolar cycloaddition of telluroketones and diazo compounds, both generated in situ. The molecular structure of 1a was established by X-ray crystallographic analysis. The photolysis of
Synthesis of Δ<sup>3</sup>-1,3,4-Telluradiazolines, a Novel Tellurium-Containing Heterocycle
作者:Renji Okazaki、Mao Minoura、Takayuki Kawashima
DOI:10.1246/cl.1993.1047
日期:1993.6
Reaction of sterically hindered hydrazones with tellurium dichloride in the presence of triethylamine in benzene afforded Δ3-1,3,4-telluradiazolines, a novel heterocycle, probably via 1,3-dipolar cycloaddition of telluroketones with diazo compounds, both generated in situ.