作者:Yannick Borguet、Guillermo Zaragoza、Albert Demonceau、Lionel Delaude
DOI:10.1002/adsc.201100890
日期:2012.5.7
afforded a series of five new dihydrophenazines instead of the expected cyclohexadiene‐1,2‐diimines. The reaction most likely proceeds via a 1,6‐electrocyclic path and provides a convenient access to an important class of nitrogen heterocycles. Subsequent treatment of the mesityl derivative with chloromethyl pivalate and silver triflate led to the corresponding benzimidazolium salt.
在湿硅胶上用高碘酸钠氧化各种带有笨重芳族取代基的N,N'-二芳基苯-1,2-二胺,得到了一系列五个新的二氢吩嗪,而不是预期的环己二烯-1,2-二亚胺。该反应最有可能通过1,6-电动循环路径进行,并提供了便捷的途径来接近一类重要的氮杂环。随后用新戊酸氯甲酯和三氟甲磺酸银处理异氰酸酯衍生物,得到相应的苯并咪唑鎓盐。