乙炔二甲基丙炔酸盐,和乙基苯基丙超越在dipolarophilic活动相应的烯属羧酸酯VS。异喹啉鎓N-芳基酰亚胺,一类甲亚胺亚胺。所述cycloadducts含有Ñ ß -vinylphenylhydrazine系统并进入一个Fischer吲哚合成,其停止所述吲哚中的一个步骤短。炔属双极性亲和剂的环加合物所涉及的[3.3]-σ重排同样快于烯属双极性亲和剂,并且不需要酸催化。在某些情况下,最初的加合物无法通过1 H NMR观察到。产品11–17用苯丙酸乙酯获得的,为苯并环E和12-苯基的空间相互作用提供了漂亮的NMR模型。用强酸处理时,五环重排产物会碎裂。例如,11在甲醇HCl中提供4-(邻氨基苯基)-异喹啉和苯甲酰乙酸甲酯。
乙炔二甲基丙炔酸盐,和乙基苯基丙超越在dipolarophilic活动相应的烯属羧酸酯VS。异喹啉鎓N-芳基酰亚胺,一类甲亚胺亚胺。所述cycloadducts含有Ñ ß -vinylphenylhydrazine系统并进入一个Fischer吲哚合成,其停止所述吲哚中的一个步骤短。炔属双极性亲和剂的环加合物所涉及的[3.3]-σ重排同样快于烯属双极性亲和剂,并且不需要酸催化。在某些情况下,最初的加合物无法通过1 H NMR观察到。产品11–17用苯丙酸乙酯获得的,为苯并环E和12-苯基的空间相互作用提供了漂亮的NMR模型。用强酸处理时,五环重排产物会碎裂。例如,11在甲醇HCl中提供4-(邻氨基苯基)-异喹啉和苯甲酰乙酸甲酯。
Synthesis of cyclopenta-fused polycyclic aromatic hydrocarbons utilizing aryl-substituted anilines
作者:Yeojin Choi、Tanmay Chatterjee、Jun Kim、Jun Soo Kim、Eun Jin Cho
DOI:10.1039/c6ob01235c
日期:——
Cyclopenta-fused polycyclic aromatic hydrocarbons (CP-PAHs), potentially electronically and biologically highly active materials, were synthesized from readily available 2-aryl-substituted anilines. Reactions occur under extremely mild, room temperature conditions using tBuONO as the sole reagent. The use of a nitrite source generates a reactive diazonium intermediate in situ that then reacts with
enable the direct reductive transformation of a variety of secondary and tertiary aliphatic bromides. A series of experimental and theoretical results suggested that the D–A molecules promote direct C–Br bondcleavage triggered by the excitation of the complex between the catalyst and the aliphatic bromide and that the alkyl groups significantly contribute to the stabilization of the complex, which