Verdazyl Radicals as Substrates for Organic Synthesis: The Synthesis and Characterization of [12]-, [13]-, and [21]-Paraheteraphanes
作者:Abbarna A. Cumaraswamy、Gordon K. Hamer、Michael K. Georges
DOI:10.1002/ejoc.201101754
日期:2012.3
para-aryl-substituted bis-verdazyl radical has been used to form a series of [n]-paraheteraphanes, which form exclusively by a [1+1] double cycloaddition reaction, with no evidence for the formation of the [2+2] quadruple cycloadduct products. 1H NMR spectroscopic studies show that rotation of the phenyl ring of these compounds is affected by the size and structure of the [n]-paraheteraphane cavity.
串联分子间-分子内 1,3-偶极环加成序列与衍生自对芳基取代的双戊二烯基的双偶氮甲碱亚胺已被用于形成一系列 [n]-对杂杂芳烃,其仅由1+1] 双环加成反应,没有形成 [2+2] 四环加成产物的证据。1 H NMR 光谱研究表明,这些化合物的苯环旋转受[n]-对杂杂环烷空腔的大小和结构的影响。