Aziridines undergo ring opening smoothly with various arylamines in 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([bmim]BF4) or 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([bmim]PF6) ionic liquids under mild and neutral conditions to afford the corresponding vicinal‐diamines in excellent yields with high regioselectivity. The recovered activated ionic liquids are recycled for four to five runs with no loss of activity. 相似文献
A series of novel quinoline derivatives having a spirocyclopropyl ring can be synthesized by one‐pot, three‐component aza‐Diels–Alder reactions of arenecarbaldehydes, arylamines, and methylenecyclopropanes (MCPs) using a heterogeneous solid acid catalyst, montmorillonite KSF, under mild reaction conditions in good to excellent yields. 相似文献
An intermolecular radical cascade reaction between readily prepared o‐methylthio‐arylamines or o‐methylselanyl‐arylamines and alkynes for the preparation of valuable benzothiophenes or benzoselenophenes is reported. These transformations occur efficiently with complete regioselectivity and the products are obtained in moderate to good yields. The current protocol is successfully applied to the synthesis of the key intermediates of the drug raloxifene and an AT1 receptor antagonist.
The hole reorganization energy and excited states characteristics of N,N′‐bis(naphthalen‐1‐y)‐N,N′‐bis(phenyl)benzidine (NPB), phenyl arylamine, diphenyl arylamine (DP), and terphenyl arylamine (TP) are investigated using time‐dependent density functional theory. It is shown that the hole transport characteristics of the materials TP and DP are better than the commercially available materials NPB. The quantum chemical calculation method accesses a powerful tool by which the potential hole transport materials can be easy to screen out. 相似文献