Preparation of onium salts of a reduced anthracenone crown ether macrocycle: a reactivity series involving pyridine, phosphine, thiophene, nitrile and primary amide nucleophiles
作者:Kadarkaraisamy Mariappan、Gerald Caple、Prem N. Basa、Andrew G. Sykes
DOI:10.1002/poc.2902
日期:2012.8
ammonium, phosphonium, thiophene, and amide adducts via a carbocation intermediate. X‐ray crystallography confirms the structures of the products, including those when two competing nucleophiles are present. A reactivity series that mirrors the nucleophilicity index, where reactivity decreases in the order thiophene > pyridine > primary amides > alkyl nitriles >> aromatic nitriles (unreactive), results
无机酸与含有仲醇的环状大分子反应,通过碳正离子中间体产生铵,phospho,噻吩和酰胺加合物。X射线晶体学证实了产物的结构,包括当存在两个相互竞争的亲核试剂时的结构。得到反映亲核性指数的反应系列,其中反应性依次降低为噻吩>吡啶>伯酰胺>烷基腈>>芳香腈(无反应性)。将金属离子加到溶解在乙腈中的铵加合物上,可通过Ritter酰胺合成反应生成仲酰胺。版权所有©2012 John Wiley&Sons,Ltd.