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。