Palladium-Catalyzed Coupling of<i>ortho</i>-Alkynylanilines with Terminal Alkynes Under Aerobic Conditions: Efficient Synthesis of 2,3-Disubstituted 3-Alkynylindoles
作者:Bo Yao、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201205596
日期:2012.12.3
Two nucleophiles, one triple bond: Under aerobic conditions, palladium‐catalyzed direct coupling of o‐alkynylanilines and terminal alkynes took place smoothly to afford the 2,3‐disubstituted 3‐alkynylindoles 3 in good to excellent yields. The intermediate A was characterized and a retro‐aminopalladation of B was observed for the first time.
两个亲核试剂,一个三键:在好氧条件下,钯催化的邻炔基苯胺和末端炔烃的直接偶联反应顺利进行,从而以良好的产率获得了2,3-二取代的3-炔基吲哚3。对中间体A进行了表征,并首次观察到了B的逆氨基pal 。