Synthesis, Stability, and Photoreactivity of Diazirinyl-Substituted<i>N-</i>Heterocycles Based on Indole, Benzimidazole, and Imidazole
作者:Björn Raimer、Thomas Wartmann、Peter G. Jones、Thomas Lindel
DOI:10.1002/ejoc.201402354
日期:2014.9
The synthesis, thermal stability, and photoreactivity of trifluoromethyl diazirines installed at the heterocyclic section of N-methylindole, N-methylbenzimidazole, and at N-methylimidazole were investigated. N-Tosyl-3-diazirinylindole and N-methyl-2-diazirinylbenzimidazole proved to be thermally stable, whereas the corresponding 2-diazirinylindole was not. The least stable was 2-diazirinylimidazole
研究了安装在 N-甲基吲哚、N-甲基苯并咪唑和 N-甲基咪唑杂环部分的三氟甲基二氮丙啶的合成、热稳定性和光反应性。N-Tosyl-3-diazirinylindole 和 N-methyl-2-diazirinylbenzimidazole 被证明是热稳定的,而相应的 2-diazirinylindole 则不是。最不稳定的是 2-二氮杂咪唑,它会快速分解。用乙醇淬灭表明形成了相应的卡宾。通过卡宾的放热缩氨酸开环使分解合理化。量子力学计算 [B3LYP/6-311G(2d,2p)] 预测所有卡宾的单线态基态。因此,Friedel-Crafts 烷基化产物在辐照(350 nm,