Radical annulations with nitriles: Novel cascade reactions of cyano-substituted alkyl and sulfanyl radicals with isonitriles
作者:Carlo Maurizio Camaggi、Rino Leardini、Daniele Nanni、Giuseppe Zanardi
DOI:10.1016/s0040-4020(98)00230-0
日期:1998.5
New radical annulation reactions are described involving addition of cyano-substituted alkyl and sulfanyl radicals to aromatic isonitriles. The tandem cyclisation of the resulting imidoyl radicals onto the cyano group affords cyclopenta- and thienoquinoxalines, respectively. The intervention of the isonitriles in the aromatisation process of the cyclohexadienyl radicals is discussed, as well as the
描述了新的自由基环化反应,该反应涉及将
氰基取代的烷基和
硫烷基基团加成到芳族异腈中。将所得的亚
氨酰基自由基串联环合到
氰基上,分别得到环戊达和
噻吩并
喹喔啉。讨论了异腈在环
己二烯基的芳构化过程中的干预,以及通过将亚
氨基加到腈部分而获得的
亚胺基的环化的区域
化学。半经验
AM1计算的结果也支持了芳香环上只有6元闭环的假说。