1‐Butyl‐3‐methylimidazolium Tetrafluoroborate ([Bmim]BF4) Ionic Liquid: A Novel and Recyclable Reaction Medium for the Synthesis of vic‐Diamines

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.     

Montmorillonite KSF‐Catalyzed One‐Pot,Three‐Component,Aza‐Diels–Alder Reactions of Methylenecyclopropanes with Arenecarbaldehydes and Arylamines

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.     

Preparation of Benzothiophenes and Benzoselenophenes from Arylamines and Alkynes via Radical Cascade Reactions

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.

     

一种芳胺低聚物抗氧剂的抗氧化性能

选用加压差示扫描量热法和烘箱氧化法考察了一种芳胺低聚物抗氧剂在基础油(酯)中、锂基润滑脂中的抗氧化效果,用氧化安定性和腐蚀性试验考察了该抗氧剂在AS5780航空涡轮发动机油中的性能。结果表明,芳胺低聚物抗氧剂在基础油(酯)中具有突出的抗氧化效果;在润滑脂和航空涡轮发动机油中,都具有优异的高温抗氧化性能。     

Quantum chemical calculation study on terphenyl arylamines hole transport materials

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.